1979 GMC P2500 Transmission Parts

Below you will find various in-demand GMC Transmission Parts, components and accessories for your 1979 P2500. Advance Auto Parts has popular P2500 parts like Transmission Seals, Transmission Mounts, Transmission Cooler and Parts and more. You’ll also find aftermarket and OEM Transmission Parts for other P2500 model years including 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989 and more. Select a category of 1979 GMC P2500 Transmission Parts below and start saving instantly.

Please Select your Vehicle to See Exact Fit Parts

Popular 1979 GMC P2500 Transmission Parts Categories

Gear Shift Levers

Transmission Torque Converters

OE Transmission Coolers

Transfer Shaft Bearing

Transmission Solenoids

Transmission Oil Cooler Lines

Transmission Shift Cables

Countershaft Bearings

Transmission Pan Gaskets

Transmission Oil Cooler Fittings

Automatic Transmission Line Connectors

Pinion Bearings

Transmission Mounts

Transmission Oil Pans

Transmission Master Repair Kits

Back Up and Neutral Safety Switches

Transmission Rebuild Kits

Transmission Oil Pan Gaskets

Transmission Dipsticks

Automatic Transmission Differential Bearings

Transmission Bushings

Automatic Transmission Output Shaft Seals

Automatic Transmission Oil Pump Seals

Transmission Modulator Valves

Pinion Seals

Automatic Transmission Dipstick Seals

Transmission Seals and O-rings

Manual Transmission Bearing and Seal Overhaul Kits

Torque Converter Seals

Extension Housing Seals

Automatic Transmission Case Vents

Shaft Seals

Manual Transmission Gasket Sets

Gear Shift Lever Bushing

Transmission Shift Kits

Transmission Bands

Automatic Transmission Selector Shaft Seals

Automatic Transmission Flexplate Mounting Bolts

Automatic Transmission Detent Cable Seals

Shift Shaft Seals

Automatic Transmission Oil Pump Gaskets

Automatic Transmission Fluid Filler Tube Seals

Automatic Transmission Oil Pump O-Rings

Automatic Transmission Speedometer Pinion Seals

Automatic Transmission Seals

Automatic Transmission Shifter Cable Brackets

Automatic Transmission Friction Discs

Automatic Transmission Kickdown Cables

Manual Transmission Seal Kit

Auto Trans Differential Bearing and Race Set

Essential Transmission Parts for 1979 GMC P2500s

from

$9.59

AT SEL SHAFT SEAL

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$12.99

National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.

Product Features:

Design type: spring loaded; multi-lip
Temperature range: -20 Deg. F to 300 Deg. F / -29 Deg. C to 49 Deg. C
Resistance to EP lubricants
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$33.99

Cable Bracket, GM APPLICATION: For TH400, 350, 250, 200, 700R4, 2004R transmissions.

Product Features:

Shifter Service Parts

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$11.99

This clutch pilot bushing is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:

Direct replacement – this clutch pilot bushing matches the fit and function of the factory part on specified years, makes and models
Ideal solution – this bushing is a reliable replacement for an original part that has failed due to fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

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$23.99

Flywheel and flex plate bolts play an important role in the performance and safety of race cars and street machines alike. That is why the fastener experts at ARP have developed special bolts that are far superior to OEM hardware. ARP offers two styles of flywheel/flex plate bolts: High Performance and Pro Series. They are both forged from aerospace alloy and heat treated prior to thread rolling and machining. Both feature an exclusive, flat, 12 point head design and larger than stock shank diameter for increased strength and improved flywheel register. The popular High Performance series is rated at 180,000 PSI, and the premium grade Pro Series, originally developed for NASCAR competition, has a 200,000 PSI rating. Complete with washers and nuts where applicable.

Product Features:

Forged From Aerospace Alloy And Heat Treated Prior To Thread Rolling And Machining
Feature An Exclusive, Flat, 12 Point Head Design And Larger Than Stock Shank Diameter
Flanged Nut
Increased Strength And Improved Flywheel Register
Chevy 90░ V6 & 305-502 With 1-pc Rear Seal
0.725″ Underhead Length
200,000 PSI

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$15.99

Driveworks wheel bearings are a direct replacement for original parts at a much more affordable cost. Each wheel bearing is engineered to meet or exceed OE specifications, and goes through intensive quality control inspections to ensure proper fitment. Manufactured using high-precision machinery and advanced heat treatment processes, these bearings are designed for maximum durability and extended periods of use under any driving condition. Specific to certain applications, Driveworks bearings have multi-lip seals built into the bearing for increased protection against invasive contaminants and premature wear.

Product Features:

Depending on the application, specified Driveworks wheel bearings have integrated encoder rings that automatically sync with the vehicle’s anti-lock braking system (ABS) upon successful installation
Engineered, manufactured, and tested to meet or exceed OE specifications
Integrated seal design improves contamination resistance for a longer bearing life
High performance grease is used to lubricate the inner raceway to ensure smooth operation, higher operating temperatures, and minimal noise
Manufactured from high quality steel to maximize durability under even the harshest driving conditions
Brand may vary by location

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$4.19

AT DETENT CABLE SEAL

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$385.99

The Master Racing overhaul kits are supplied with all of the gaskets, seals, bushings, and friction material required for a complete high performance or racing trans overhaul. Does not come with transbrake gaskets or components.

Product Features:

Complete High Perf. Or Racing Trans. Overhaul
Includes Only OEM Valvebody Gaskets
Instructions Not Included

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$48.49

Bracket and Lever Kit for TH-350, 400, 200, 700-R4, 4L60E and 200-4R transmissions.

Product Features:

Incl. Cable Bracket/Shift Lever/Spacers
Incl. Swivel/Cotter Pin
Natural Finish
Sold as a kit
Replacement part

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$9.59

AT EXT HOUSING SEAL

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$10.79

AT SPEED PINION SEAL

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$6.99

Design type: spring loaded; multi-lip
Temperature range: -20 Deg. F to 300 Deg. F / -29 Deg. C to 49 Deg. C
Resistance to EP lubricants
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$9.59

AT OIL PUMP ORING

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$25.99

Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.

Product Features:

PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION – Crowned raceways and rollers for even load distribution
OE-STYLE DESIGN – Engineered to meet OE specifications
COMPREHENSIVE COVERAGE – Industry-leading coverage for domestic and import applications
RIGOROUS TESTING – Comprehensive testing throughout design and development processes by National engineers for quality you can count on

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$11.99

Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust.

Product Features:

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Unsurpassed quality you can trust
Validated for fit, form and function
Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes

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$16.79

Our wheel seals are engineered using only the highest-quality materials to meet vehicle manufacturer specificatons. We work with suppliers to design seals that meet FAG’s quality standards. Seals are designed to protect wheel end components from contamination – such as dirt, dust, and moisture – and prevent the loss of grease over the life of the bearing. The specifications for wheel seals are very demanding, and the type required depends on the specific application, position and vehicle class.

Product Features:

High-precision and High-quality components used in all KITs
Coverage of classic and new high-tech solutions for the best system coverage

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$136.99

Add fluid capacity to your transmission. Extra fluid means more cooling, and more cooling means better efficiency and performance. Add life to your transmission with a B&M Deep Pan!

Product Features:

Additional Oil Capacity
More Cooling Ability
No Dipstick Modification
Some Include Fluid Pickup Extension
Built-In Drain Plugs
Chrome Plated Steel

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$25.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Transmission cooler reinstallation kit
Contains part numbers 248001, 226201, 240250 and 4 hose clamps
Provides all hardware for reinstallation of Imperial transmission coolers
Contains nylon mounting rods, foam pads, locking buttons, hose and fitting
Made of high grade nylon for easy installation
Removable buttons for cooler/fan relocation
Made for both transmission coolers and electric fan installation
Comes with Quick Connect coupler

from

$21.99

Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.

Product Features:

PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION – Crowned raceways and rollers for even load distribution
OE-STYLE DESIGN – Engineered to meet OE specifications
COMPREHENSIVE COVERAGE – Industry-leading coverage for domestic and import applications
RIGOROUS TESTING – Comprehensive testing throughout design and development processes by National engineers for quality you can count on

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$4.29

AT SOLENOID SEAL

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$6.39

AT DPSTK TUBE SEAL

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$549.99

Converter: Th350 24-2800 Stall

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$79.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial high-performance transmission cooler
Size: 3/4″ x 7-1/2″ x 15-7/8″
SAE 45-degree fittings for maximum reliability
Electrostatic powder-coated to prevent corrosion
Up to Class C motorhomes, towing up to 5,000 pounds
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction

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$99.99

These universal fit adjustable cables will work in 95 percent of all listed transmission applications, yet are less expensive than OE models. Use as straight replacement cable or ease the installation of transmission swaps.

Product Features:

Universal Fit Adjustable
Less Expensive Than OE Models
Ease Trans. Swap Installation

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$29.99

AUTO TRANS BAND

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$393.99

B&M Cast Aluminum Transmission Pans are constructed of thick A356.0-T6 cast aluminum. Designed to fit a wide range of cars and trucks with TH700-R4, 4L60, 4L60E & 4L65E transmissions, these deep pans significantly increase the fluid capacity and dissipate heat much faster to prolong the life of the transmission and related components. Additional features include an engraved B&M logo, drain port, a magnetic drain plug for catching ferrous metal particles, and complete hardware and installation instructions.

Product Features:

Additional Oil Capacity
More Cooling Ability
No Dipstick Modification
Some Include Fluid Pickup Extension
Built-In Drain Plugs
Cast Aluminum

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$12.99

Made of quality materials, this automatic transmission oil cooler line connector matches the fit and function of a damaged original equipment connector to restore leak-free performance between the transmission and the oil cooler.

Product Features:

Quality replacement – this transmission cooler connector matches the fit and function of the original equipment connector
Durable construction – this oil cooler line connector is made of quality materials for a precise fit and leak-free durability
Performance tested – this connector has been rigorously pressure tested to ensure reliable performance
Ideal shop supply – this connector is recommended to have on hand any time service is being performed on the transmission oil cooler line

Upgrade your 1979 GMC P2500 with Top-Quality Transmission Parts

When it comes to maintaining or upgrading your 1979 GMC P2500, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your GMC or enhancing its overall performance, Transmission Parts are key to keeping your P2500 functioning at its best. At Advance Auto Parts, we offer a wide selection of 121 Transmission Parts for the 1979 GMC P2500, designed to meet your needs without breaking the bank. From Transmission Seal replacements to Transmission Mounts upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.

Affordable Prices and Wide Selection

Shopping for Transmission Parts for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Transmission Parts for your 1979 GMC P2500 at great prices. Our Transmission Parts inventory for this model ranges from just $3.19 to $1,349.99, with an average price of $169.54. Our 121 Transmission Parts in stock come from 16 trusted brands, so you’re sure to find the right part for your 1979 GMC P2500 without overspending.

Top Brands and High Customer Satisfaction

Advance Auto Parts takes pride in offering only the best brands in the automotive industry. For your 1979 GMC P2500, we stock popular OEM and aftermarket Transmission Parts from top names like National, Dorman, B & M, and more. National Transmission Parts start at just $10.99 and boast an impressive 4.3 stars average rating from customers. Dorman and B & M also bring quality to the table, with Transmission Parts available starting at $5.99, and at an average 4.2 stars rating. With 604 customer reviews and counting, our 1979 GMC P2500 Transmission Parts have a strong track record of reliability, ensuring you can trust your purchase.

Explore Related Parts and More

While you’re here, don’t forget to check out other essential categories that go hand in hand with Transmission Part upgrades. Explore related part types like Batteries and Chargers, Oil and Lubricants and more to make sure your 1979 GMC P2500 is always ready to roll. We’re committed to providing you with everything you need to keep your P2500 in top shape, all in one place. Start shopping confidently below for your 1979 GMC P2500!

Best-Selling Transmission Seals for 1979 GMC P2500s

Enhance the driving experience in your GMC with 24 quality Transmission Seal components, starting at $3.19.

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from

$10.99

Design type: spring loaded; single-lip
Temperature range: -20 Deg. F to 300 Deg. F / -29 Deg. C to 49 Deg. C
Resistance to EP lubricants
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$4.99

Value-priced seal meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$9.59

AT SEL SHAFT SEAL

from

$24.49

Product Features:

Design type: spring loaded; multi-lip
Temperature range: -40 Deg F to 225 Deg F / -40 Deg C to 107 Deg C
Good low temperature capability
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

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$6.39

AT DPSTK TUBE SEAL

from

$6.99

Product Features:

Design type: springless; single-lip
Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
Good low temperature capability
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$7.79

Value-priced seal meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$4.29

AT DETENT CABLE SEAL

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$12.99

AT EXT HOUSING SEAL

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$9.59

AT EXT HOUSING SEAL

from

$3.19

Product Features:

ATP Transmission Seals And Gaskets are exact fit, no compromise replacement parts

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$4.19

AT DETENT CABLE SEAL

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$5.99

Design type: springless; single-lip
Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
Good low temperature capability
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$12.99

Design type: spring loaded; multi-lip
Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
Good low temperature capability
Low swell in hydrocarbon fluids
Delivers quality and reliable performance for every type of repair

from

$10.79

AT SPEED PINION SEAL

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$123.99

ManTransBrg-SealKit

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$14.49

Value-priced seal meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$9.59

AT EXT HOUSING SEAL

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$5.99

AT SEAL

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$92.99

ManTransBrg-SealKit

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$18.49

High-precision and High-quality components used in all KITs
Coverage of classic and new high-tech solutions for the best system coverage

from

$16.79

High-precision and High-quality components used in all KITs
Coverage of classic and new high-tech solutions for the best system coverage

from

$5.19

High-precision and High-quality components used in all KITs
Coverage of classic and new high-tech solutions for the best system coverage

from

$3.99

Shift Shaft O-Ring

Most Popular 1979 GMC P2500 Transmission Mounts

Customize your GMC with 2 Transmission Mounts products like Transmission Mounts, all priced under $11.99.

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from

$11.99

Anchor 2378 This mount supports the transmission and dampens vibration. Each mount is specifically engineered and designed to OE standards. Natural and SBR rubber provide maximum life and performance. Steel fasteners are heat treated grade 5 bolts. A special bonding agent is used to ensure a rubber to metal bond. Rubber material is mixed to specific Durometer, hardness.

Product Features:

MAXIMUM LIFE & PERFORMANCE: Both natural and SBR (Styrene Butadiene) rubber provide good abrasion resistance and aging stability to ensure maximum life and performance.
MEETS OR EXCEEDS DUROMETER MEASUREMENTS: All rubber material is manufactured to specific Durometer (hardness) measurements based on the vehicle’s application requirements.
HARDENED STEEL FASTENERS: All fasteners are made of hardened steel with heat treated Grade #5 bolts.
SUPERIOR BOND: A special Chemlok bonding agent is used to ensure a superior rubber-to-metal bond.
HYDRAULIC MOUNT DESIGN: Hydraulic Mounts (applicable where OE) are designed for most front wheel drive vehicles because transverse drive train mounting.
For Years: 1957-1984
Weight approx: 2 Lbs
Height: 1.8 In.: 45.7 mm
All Bolt Holes Inline
Bolt Centerline: 1.5 Inch: 38.1 Mm

from

$9.29

Anchor 2268 This mount supports the transmission and dampens vibration. Each mount is specifically engineered and designed to OE standards. Natural and SBR rubber provide maximum life and performance. Steel fasteners are heat treated grade 5 bolts. A special bonding agent is used to ensure a rubber to metal bond. Rubber material is mixed to specific Durometer, hardness.

Product Features:

MAXIMUM LIFE & PERFORMANCE: Both natural and SBR (Styrene Butadiene) rubber provide good abrasion resistance and aging stability to ensure maximum life and performance.
MEETS OR EXCEEDS DUROMETER MEASUREMENTS: All rubber material is manufactured to specific Durometer (hardness) measurements based on the vehicle’s application requirements.
HARDENED STEEL FASTENERS: All fasteners are made of hardened steel with heat treated Grade #5 bolts.
SUPERIOR BOND: A special Chemlok bonding agent is used to ensure a superior rubber-to-metal bond.
HYDRAULIC MOUNT DESIGN: Hydraulic Mounts (applicable where OE) are designed for most front wheel drive vehicles because transverse drive train mounting.
For Years: 1958-1984
Weight approx: 2 Lbs
Rubber Crown With Air Gap
Height Without Studs: 1.9 Inch: 48.25 Mm
Studs And Bolt Holes Inline
Stud Centerline: 1.5 Inch: 38.1 Mm

Top Picks for 1979 GMC P2500 Transmission Cooler and Parts

Upgrade GMC P2500s with top-quality Transmission Cooler and Parts parts, including 11 OEM and aftermarket selections for your 1979 model.

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from

$85.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial high-performance transmission cooler
Size: 3/4″ x 10″ x 15-7/8″
SAE 45-degree fittings for maximum reliability
Electrostatic powder-coated to prevent corrosion
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction

from

$73.99

The Imperial Maxi-Cool XL’s plate and fin design offer excellent cooling efficiency in a compact, space-efficient design.

Product Features:

Imperial Maxi-Cool plate and fin transmission cooler
Size: 3/4″ x 11″ x 7-1/2″
Mid-size and full-size cars, pickups
GVWR up to 20,000 lbs.; towing up to 2,500 lbs.
Compatible with OEM cooler systems
Made with the highest quality materials
100% pressure testing to 150 PSI for quality assurance
33% more efficient than a comparable tube and fin design

from

$11.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial mounting kit system
For installation of transmission coolers and electric fans
Provides quick, effective installation of Imperial products
Contains nylon mounting rods, foam pads and locking buttons
Aftermarket electric fan and cooler mounting rods
Made with the highest quality materials
Quality machined for durability
Removable buttons for relocation
Aftermarket electric fan and cooler mounting rods
Made with the highest quality materials
Quality machined for durability
Removable buttons for relocation

from

$85.99

The Imperial Maxi-Cool XL’s plate and fin design offer excellent cooling efficiency in a compact, space-efficient design.

Product Features:

Class “A” motor homes, large travel trailers, 5th-wheel trailers
GVWR up to 30,000 lbs.; towing up to 10,000 lbs.
Compatible with OEM cooler systems
33% more efficient than a comparable tube and fin design

from

$65.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial Econo-Kool tube and fin transmission cooler
Size: 3/4″ x 10″ x 15-7/8″
Class “A” motor homes, large travel trailers, 5th-wheel trailers
GVWR up to 26,000 lbs.; towing up to 10,000 lbs.
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators

from

$80.99

The Imperial Maxi-Cool XL’s plate and fin design offer excellent cooling efficiency in a compact, space-efficient design.

Product Features:

Imperial Rapid-Cool plate and fin transmission cooler
Size: 3/4″ x 11″ x 9-1/2″
Pickup trucks and vans, class “C” motor homes, travel trailers to 24′
GVWR up to 24,000 lbs.; towing up to 5,000 lbs.
33% more efficient than a comparable tube and fin design
Compatible with OEM cooler systems
Made with the highest quality materials
100% pressure testing to 150 PSI for quality assurance
33% more efficient than a comparable tube and fin design

from

$52.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Mid-size and full-size cars, pickups
GVWR up to 18,000 lbs.; towing up to 3,500 lbs
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators

from

$79.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial high-performance transmission cooler
Size: 3/4″ x 7-1/2″ x 15-7/8″
SAE 45-degree fittings for maximum reliability
Electrostatic powder-coated to prevent corrosion
Up to Class C motorhomes, towing up to 5,000 pounds
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction

from

$25.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Transmission cooler reinstallation kit
Contains part numbers 248001, 226201, 240250 and 4 hose clamps
Provides all hardware for reinstallation of Imperial transmission coolers
Contains nylon mounting rods, foam pads, locking buttons, hose and fitting
Made of high grade nylon for easy installation
Removable buttons for cooler/fan relocation
Made for both transmission coolers and electric fan installation
Comes with Quick Connect coupler

from

$60.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial high-performance transmission cooler
Size: 3/4″ x 7-1/2″ x 12-1/2″
SAE 45-degree fittings for maximum reliability
Electrostatic powder-coated to prevent corrosion
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction

from

$65.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial Econo-Kool tube and fin transmission cooler
Size: 3/4″ x 7-1/2″ x 15-7/8″
Pickup trucks and vans, class “C” motor homes, travel trailers to 24′
GVWR up to 22,000 lbs.; towing up to 5,000 lbs.
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators

In-Demand Automatic Transmission Parts for 1979 GMC P2500s

Select from 17 premium Automatic Transmission Parts parts for your 1979 GMC P2500, with prices ranging from $4.29 to $118.99.

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from

$7.49

This transfer case vent is designed to match the fit and function of the original vent on specified vehicles, and is engineered for durability and reliable performance.

Product Features:

Direct replacement – this transfer case vent is designed to match the fit and function of the original vent on specified vehicles
Restores functionality – reliable replacement for an original vent that has failed due to blockage or fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

from

$4.29

AT SOLENOID SEAL

from

$21.99

Fully adjustable vacuum modulator to maintain accurate shift points.

Product Features:

Meets or exceeds OE fit, form and function

from

$33.99

Fully adjustable vacuum modulator to maintain accurate shift points.

Product Features:

Meets or exceeds OE specifications

from

$11.99

Direct replacement – this clutch pilot bushing matches the fit and function of the factory part on specified years, makes and models
Ideal solution – this bushing is a reliable replacement for an original part that has failed due to fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

from

$49.99

B&M’s vacuum modulator is fully adjustable, this allows you to tailor your shift points to within a range of 2-4 mph. Comes preadjusted for normal shift points. For TH350 and TH400.

Product Features:

Fully Adjustable
Allows You To Tailor Shift Points
Comes Supplied Pre-Adjusted

from

$9.59

AT OIL PUMP ORING

from

$51.99

AT MODULATOR VALVE

from

$21.99

AT MODULATOR VALVE

from

$11.79

AT FRT PUMP BUSHING

from

$95.99

Billet aluminum handle with flexible braded steel tube mounts to the firewall. 29-3/4 inch long.

Product Features:

Braided Stainless Steel
Firewall Mounting
Includes Oil Fill Tube

from

$118.99

AT CONTR SOLENOID

from

$99.99

When swapping the TH400 transmission into any vehicle, this kit makes installation of the transmission’s kickdown feature a snap. This switch mounts to either a TH700R4, TH200, TH200-R4 or TH350 throttle cable bracket.

Product Features:

Allows High Speed Cruise
Cruise In Overdrive
Prevents Part Throttle Kickdown
Quick Installation

from

$33.99

Cable Bracket, GM (Bandit style shifters only) APPLICATION: For TH-400, 350, 250, 200, 700R4, 200-4R with 80797, 80798 or 81050 shifter.

Product Features:

Shifter Service Parts
Steel
Natural Finish
Sold individually
Replacement for Bandit shifters

from

$29.99

AUTO TRANS BAND

from

$13.79

AT CLUTCH PLATE

from

$9.59

AT CLUTCH PLATE

Most Sold 1979 GMC P2500 Transmission Bearings

Explore our best-selling GMC parts for the 1979 P2500 among 6 OEM and aftermarket options starting from $15.99.

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from

$25.99

Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.

Product Features:

PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION – Crowned raceways and rollers for even load distribution
OE-STYLE DESIGN – Engineered to meet OE specifications
COMPREHENSIVE COVERAGE – Industry-leading coverage for domestic and import applications
RIGOROUS TESTING – Comprehensive testing throughout design and development processes by National engineers for quality you can count on

from

$15.99

Depending on the application, specified Driveworks wheel bearings have integrated encoder rings that automatically sync with the vehicle’s anti-lock braking system (ABS) upon successful installation
Engineered, manufactured, and tested to meet or exceed OE specifications
Integrated seal design improves contamination resistance for a longer bearing life
High performance grease is used to lubricate the inner raceway to ensure smooth operation, higher operating temperatures, and minimal noise
Manufactured from high quality steel to maximize durability under even the harshest driving conditions
Brand may vary by location

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$21.99

Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.

Product Features:

PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION – Crowned raceways and rollers for even load distribution
OE-STYLE DESIGN – Engineered to meet OE specifications
COMPREHENSIVE COVERAGE – Industry-leading coverage for domestic and import applications
RIGOROUS TESTING – Comprehensive testing throughout design and development processes by National engineers for quality you can count on

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$43.99

We develop and produce high-quality roller bearings, spherical bearings, and plain bearings worldwide for a wide range of applications.

Product Features:

High-precision and High-quality components used in all KITs
Coverage of classic and new high-tech solutions for the best system coverage

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With advanced load-carrying capacity and compact design, tapered roller bearings are used in wheel bearings, transmissions, differentials, transfer cases and other miscellanous applications. FAG manufacturers over 100 million tapered roller bearings annually.

Product Features:

High-precision and High-quality components used in all KITs
Coverage of classic and new high-tech solutions for the best system coverage

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$16.49

High-precision and High-quality components used in all KITs
Coverage of classic and new high-tech solutions for the best system coverage

Top-Rated Transmission Parts Brands For Your 1979 GMC P2500

Shop for the best-rated brands offering Transmission Parts and other products for your 1979 GMC P2500s. Below you’ll find some of our best rated Transmission Parts from National, Dorman, and B & M, and more. Transmission Parts from these brands that fit a 1979 P2500 start at just $5.99 and are rated as high as 4.3 stars. OEM and aftermarket Transmission Parts don’t get more top quality, durable, and affordable than from the brands below.

Popular National 1979 GMC P2500 Transmission Parts

When it comes to maintaining or upgrading your 1979 GMC P2500, using quality Transmission Parts is essential to ensure durability and a perfect fit. National ticks all of those boxes. We offer a wide selection of National Transmission Parts, specifically designed for the 1979 GMC P2500. With over 3 National brand Transmission Parts in stock, you’re sure to find what you need. The prices for these top-notch parts start as low as $10.99, with an average price of just $23.82. Plus, with over 28 customer reviews and an average rating of 4.3 stars, you can trust that our National Transmission Parts will get the job done right. Choose Advance Auto Parts for reliability, quality, and expert-approved parts that keep your vehicle running strong.

from $10.99

(4)

Multi-Purpose Seal

“it worked”

from $24.49

(1)

Multi Purpose Seal

“Fits right the first time… No more leaks…”

from $35.99

(23)

Multi-Purpose Bearing

“fits my 86 cj7, seems to be good quality”

Popular Dorman 1979 GMC P2500 Transmission Parts

Dorman auto parts is one of the highest quality Transmission Part brands in the market. Any 1979 GMC P2500 owner should feel confident when installing genuine Dorman parts in their vehicle. To ensure the best fit and performance for your 1979 P2500, Advance Auto Parts carries a full inventory of 3 Dorman Transmission Parts. Plus you will be keeping your GMC in peak condition while saving money because prices on these Dorman Transmission Parts range from $5.99 to $12.99, plus, with more than 6 customer reviews and an impressive 4.2 stars average rating, you can be confident the Fram Transmission Parts below will deliver on both quality and value.

from $5.99

(1)

Shifter Link Bushing

“Good fit”

from $12.99

(1)

Transmission Line Connector

“Fits 700r transmission perfect for hooking steel transmission lines”

from $7.49

(4)

Auto Transmission Case Vent

“Works for multiple vent areas of any vehicle, I got it for my gas tank fume vents!”

FAQs for 1979 GMC P2500 Transmission Parts

Which Transmission Parts are best-sellers for 1979 GMC P2500s?

Out of 121 Transmission Parts that fit 1979 GMC P2500s, the following parts are the top sellers:

Multi-Purpose Bearing (3275876) – $35.99
Wheel Bearing: Direct Fit, 1 Piece (5050138) – $15.99
Tapered Roller Bearing Cone (5052513) – $25.99

What’s the price range for 1979 GMC P2500 Transmission Parts?

Transmission Part prices for the 1979 GMC P2500 start at $3.19 and go up to $1,349.99 for the most premium parts.

What’s the average price of a Transmission Part for a 1979 GMC P2500?

The average price for Transmission Parts for the 1979 GMC P2500 is $169.54. Keep in mind the variety of part types within our Transmission Part category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Transmission Parts for other GMC P2500 model years?

Yes, we currently carry Transmission Parts for 9 model years of GMC P2500s between 1980 and 1989. Transmission Parts are bought most frequently for the following model years: 1989, 1988, 1987, 1986, 1985, 1984, 1983, 1982, and 1981.

What are the cheapest Transmission Parts for my 1979 GMC P2500?

The cheapest 1979 GMC P2500 Transmission Parts we carry in stock are:

Automatic Transmission Speedometer Pinion Seal (11236107) – $3.19
Shift Shaft O-Ring (12009712) – $3.99
AT DETENT CABLE SEAL (10861007) – $4.19
AT SOLENOID SEAL (11239035) – $4.29
AT DETENT CABLE SEAL (10861026) – $4.29

What are the top-rated Transmission Parts that fit the 1979 GMC P2500?

Out of 604 reviews by customers, our 1979 GMC P2500 Transmission Parts have an average customer rating of . These are some of the highest-rated Transmission Part types for the 1979 GMC P2500 and their top-rated products:

Automatic Transmission Differential
- Multi-Purpose Bearing (3275876) – $35.99

What types of Transmission Parts do you sell for my 1979 GMC P2500?

As of 3/1/26, these are some of the most in-demand types of Transmission Parts for a 1979 GMC P2500:

Can I get help with 1979 GMC P2500 Transmission Part orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about GMC Transmission Parts and more.

What is your return policy for GMC P2500 Transmission Parts?

Advance Auto Parts keeps returns simple. For new GMC P2500 Transmission Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

1979 GMC P2500 Transmission Parts

ATP – AT SEL SHAFT SEAL (Part No.SO-19)

National – Multi-Purpose Seal (Part No.4583)

B & M – Cable Bracket (Part No.30499)

Dorman – Help – Clutch Pilot Bushing (Part No.14650)

ARP Auto Racing – For Use With 90 Degree V6 Chevy/ 305, 502 V8 With 1 Piece Rear Seal (Part No.200-2906)

Driveworks – Wheel Bearing: Direct Fit, 1 Piece (Part No.S-5707)

ATP – AT DETENT CABLE SEAL (Part No.SO-36)

B & M – Master Overhaul Kit, TH350 Transmission (Part No.21042)

B & M – Shifter Accessories, Bracket and Lever Kit Fits TH400/TH350/TH250/200-4R/700R4 (Part No.35498)

ATP – AT EXT HOUSING SEAL (Part No.SO-22)

ATP – AT SPEED PINION SEAL (Part No.SO-34)

National – Multi-Purpose Seal (Part No.4950)

ATP – AT OIL PUMP ORING (Part No.SO-21)

National – Tapered Roller Bearing Cone (Part No.M802048)

Felpro – Transmission Oil Pan Gasket 16 Bolt Hole One Piece Gasket (Part No.TOS 18663)

Schaeffler – Shaft Seal (Part No.SS2571)

B & M – Chrome Deep Transmission Pan For TH 350 Transmission (Part No.30289)

Imperial – Transmission Oil Cooler Reinstallation Kit (Part No.248002)

National – Tapered Roller Bearing Cone (Part No.LM501349)

ATP – AT SOLENOID SEAL (Part No.JO-15)

ATP – AT DPSTK TUBE SEAL (Part No.SO-35)

Hays – Converter: Th350 24-2800 Stall (Part No.97-1B24Q)

Imperial – High Performance Transmission Oil Cooler (Part No.240514)

B & M – Kickdown Cable For TH-350 Transmission (Part No.30287)

ATP – AUTO TRANS BAND (Part No.JX-58)

B & M – Transmission Pan, Cast Deep Pan 4L60 and 4L60E (Part No.70260)

Dorman – Transmission Line Connector (Part No.800-755)

National – Multi-Purpose Seal (Part No.6712NA)

Driveworks – Oil Seal (Part No.S-9613S)

ATP – AT SEL SHAFT SEAL (Part No.SO-19)

National – Multi Purpose Seal (Part No.2286)

ATP – AT DPSTK TUBE SEAL (Part No.SO-35)

National – Multi Purpose Seal (Part No.8792S)

Driveworks – Oil Seal (Part No.S-9449)

ATP – AT DETENT CABLE SEAL (Part No.SO-37)

ATP – AT EXT HOUSING SEAL (Part No.HO-9)

ATP – AT EXT HOUSING SEAL (Part No.SO-22)

ATP – Automatic Transmission Speedometer Pinion Seal (Part No.SO-13)

ATP – AT DETENT CABLE SEAL (Part No.SO-36)

National – Multi-Purpose Seal (Part No.240735)

National – Multi-Purpose Seal (Part No.410085)

ATP – AT SPEED PINION SEAL (Part No.SO-34)

USA Standard Gear – ManTransBrg-SealKit (Part No.72334)

Driveworks – Oil Seal (Part No.S-2286)

ATP – AT EXT HOUSING SEAL (Part No.JO-57)

ATP – AT SEAL (Part No.SO-39)

USA Standard Gear – ManTransBrg-SealKit (Part No.76455)

Schaeffler – General Seal (Part No.SS2784)

Schaeffler – Shaft Seal (Part No.SS2571)

Schaeffler – Shaft Seal (Part No.SS2569)

USA Standard Gear – Shift Shaft O-Ring (Part No.76151)

Anchor – Transmission Mount: Rear, 1 Piece (Part No.2378)

Anchor – Transmission Mount: Rear, 1 Piece (Part No.2268)

Imperial – High Performance Transmission Oil Cooler (Part No.240516)

Imperial – Maxi-Kool XL Transmission Oil Cooler (Part No.243007)

Imperial – Mounting Kit System (Part No.226201)

Imperial – Maxi-Kool XL Transmission Oil Cooler (Part No.243012)

Imperial – Econo-Kool Transmission Oil Cooler (Part No.241018)

Imperial – Plate and Fin Style Transmission Cooler, Heavy Duty, 3/4" x 9-1/2" x 11" (Part No.243008)

Imperial – Econo-Kool Transmission Oil Cooler (Part No.242012)

Imperial – High Performance Transmission Oil Cooler (Part No.240514)

Imperial – Transmission Oil Cooler Reinstallation Kit (Part No.248002)

Imperial – High Performance Transmission Oil Cooler (Part No.240512)

Imperial – Econo-Kool Transmission Oil Cooler (Part No.242016)

Dorman – Help – Auto Transmission Case Vent (Part No.14689)

ATP – AT SOLENOID SEAL (Part No.JO-15)

Pro-King – Automatic Transmission Vacuum Modulator (Part No.MD-48)

Pro-King – Automatic Transmission Vacuum Modulator (Part No.MD-28)

Dorman – Help – Clutch Pilot Bushing (Part No.14650)

B & M – Modulator (Part No.20234)

ATP – AT OIL PUMP ORING (Part No.SO-21)

ATP – AT MODULATOR VALVE (Part No.JX-76)

ATP – AT MODULATOR VALVE (Part No.JX-66)

ATP – AT FRT PUMP BUSHING (Part No.CB-4)

Mr. Gasket – A/Tdipstick (Part No.9703G)

ATP – AT CONTR SOLENOID (Part No.SE-1)

B & M – Kickdown Switch Kit For TH400 Transmission (Part No.20297)

B & M – Cable Bracket (Part No.30498)

ATP – AUTO TRANS BAND (Part No.JX-58)