1978 GMC G15 Transmission Parts

Essential 1978 GMC G15 Transmission Parts

B & M – Aluminum Braided Dip Stick, Fits TH-350 Transmission (Part No.22165)

Aluminum Braided Dip Stick, Fits TH-350 Transmission

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$92.99
What better way to check you oil level by using one of B&M’s transmission fluid dipsticks? The cap screws into the tube and is O-ring sealed, while the base of the tube has a sealing grommet where it goes into the transmission.

Product Features:
  • Automatic Transmission Dip Stick
  • Mounts to bellhousing
  • Sold as a kit
  • Natural finish
  • Fits TH350 & TH350C
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ATP – AT CLUTCH PLATE (Part No.JC-50)

AT CLUTCH PLATE

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$8.99
AT CLUTCH PLATE

National – Bearings (Part No.A-36)

Bearings

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$26.99
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

Product Features:
  • Premium bearing design matches OEM specifications
  • Precision manufactured using premium-grade steel for outstanding durability and performance
  • Crowned raceways and rollers to ensure even load distribution for maximum life
  • Industry leading coverage
  • Professional technicians know they can depend on National
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Driveworks – Oil Seal (Part No.S-2043)

Oil Seal

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$7.79
Value-priced seal meets all cataloged application requirements.

Product Features:
  • Brand may vary by location
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ATP – AT OIL PUMP SEAL (Part No.CO-4)

AT OIL PUMP SEAL

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$14.99
AT OIL PUMP SEAL

Driveworks – Tapered Roller Bearing (Part No.S-LM-603012)

Tapered Roller Bearing

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$6.79
Product Features:
  • Brand may vary by location
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Imperial – Transmission Oil Cooler (Part No.241015)

Transmission Oil Cooler

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$145.99
Oil cooler 1-1/2″ x 12″ x 15-1/8″. Extra heavy-duty. Designed for severe-duty transmission oil cooling applications.

Product Features:
  • Imperial Econo-Kool® tube and fin transmission cooler
  • Size: 1-1/2″ x 12″ x 15 1/8″
  • Severe-duty transmission oil cooling applications
  • Towing with class “A” motor home or towing more than 10,000 lbs.
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ATP – AT DETENT CABLE SEAL (Part No.SO-36)

AT DETENT CABLE SEAL

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$3.99
AT DETENT CABLE SEAL

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

Wheel Bearing: Direct Fit, 1 Piece

from

$14.99
WJB Automotive 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, WJB 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 WJB 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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ATP – AUTO TRANS BAND (Part No.JX-58)

AUTO TRANS BAND

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$27.99
AUTO TRANS BAND

National – Multi Purpose Seal (Part No.410085)

Multi Purpose Seal

from

$13.99
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:
  • Low swell in hydrocarbon fluids
  • Design type: spring loaded; multi-lip
  • Provides good low temperature capability
  • Temperature range: -40°F to 225°F; -40°C to 107°C
  • Delivers quality and reliable performance for every type of repair
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ATP – AT MASTER REPAIR KIT (Part No.JM-9)

AT MASTER REPAIR KIT

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$253.99
AT MASTER REPAIR KIT

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

Auto Transmission Case Vent

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$6.99
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
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Permatex – Ultra Grey RTV Silicone Gasket Maker, 3 OZ (Part No.82194)

Ultra Grey RTV Silicone Gasket Maker, 3 OZ

from

$11.49
Permatex Ultra Grey is specified for high torque and high vibration applications. Ultra Grey offers a sensor-safe, low odor, non-corrosive formula and is OEM specified to fit dealership warranty requirements. This high performance gasket maker meets performance specs of OE silicone gaskets and can be used on high torque and vibration applications such as valve covers, water pump, intake manifold end seals ad thermostat housings.

Product Features:
  • High torque and rigidity
  • Sensor-safe, non-corrosive formula
  • OEM specified
  • Low-odor, non-corrosive formula
  • Ideal for closed spaced bolt patterns
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ATP – ATP Automatic Transmission Detent Cable (Part No.Y-100)

ATP Automatic Transmission Detent Cable

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$22.99
Detent cables connect the throttle mechanism to the transmission. Old cables can bind, break, or just become sluggish. The best repair is to replace the old cable with a new one. ATP Detent cables are designed to fit And function just like the original part to ensure durability And long life.

Product Features:
  • Includes brackets, grommets, etc to match original
  • Helps transmission determine ideal downshift
  • Improves vehicle performance
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Felpro – Transmission Oil Pan Gasket (Part No.TOS 18621)

Transmission Oil Pan Gasket

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$9.29
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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National – Multi Purpose Seal (Part No.240735)

Multi Purpose Seal

from

$5.49
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:
  • Low swell in hydrocarbon fluids
  • Design type: spring loaded; multi-lip
  • Provides good low temperature capability
  • Temperature range: -40°F to 225°F; -40°C to 107°C
  • Delivers quality and reliable performance for every type of repair
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B & M – Transmission Cast Deep Pan, Brushed Finish – TH400 (Part No.20280)

Transmission Cast Deep Pan, Brushed Finish - TH400

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$225.99
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! Adds 2 additional quarts to the system.

Product Features:
  • Additional Oil Capacity
  • More Cooling Ability
  • No Dipstick Modification
  • Some Include Fluid Pickup Extension
  • Built-In Drain Plugs
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ATP – AT SEL SHAFT SEAL (Part No.SO-19)

AT SEL SHAFT SEAL

from

$7.99
AT SEL SHAFT SEAL

Edelbrock – Automatic Trans Cable Adapter #8026 for GM 2004R, 700R4, 4L60 Transmissions (Part No.8026)

Automatic Trans Cable Adapter #8026 for GM 2004R, 700R4, 4L60 Transmissions

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$18.99
Product Features:
  • Edelbrock Part # 8026 GM Transmission adapter is for use with 2004R, 700R4, 4L60 transmissions.
  • This kit relocates the pin position on an Edelbrock Carburetor when hooking up to a throttle valve style transmission (700R4, 2004R, 4L60).
  • The pin location is critical as the TV controls line pressure, shift points, shift firmness, and part throttle downshifts.
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Dorman – Help – Clutch Pilot Bushing (Part No.14650)

Clutch Pilot Bushing

from

$8.29
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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National – Multi Purpose Seal (Part No.9449)

Multi Purpose Seal

from

$9.99
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:
  • Low swell in hydrocarbon fluids
  • Design type: spring loaded; multi-lip
  • Provides good low temperature capability
  • Temperature range: -40°F to 225°F; -40°C to 107°C
  • Delivers quality and reliable performance for every type of repair
See More

National – Multi Purpose Seal (Part No.5200)

Multi Purpose Seal

from

$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:
  • Low swell in hydrocarbon fluids
  • Design type: spring loaded; multi-lip
  • Provides good low temperature capability
  • Temperature range: -40°F to 225°F; -40°C to 107°C
  • Delivers quality and reliable performance for every type of repair
See More

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

Transmission Mount: Rear, 1 Piece

from

$9.49
The purpose of the mount is to support the engine and transmission on the chassis and dampen vibration and noise from reverberating to the rest of the vehicle. Engine and Transmission Mounts are engineered and manufactured to meet or exceed OEM specifications using the latest CAD/CAM engineering process to ensure superior quality, form, fit and function. Only premium quality materials are used in the manufacturing process to guarantee precise performance and maximum durability. Applicable to BUIC 65-74; CHEV 57-84; GMC 67-84; OLDS 64-79; PONT 64-81;. Please verify your application.

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 Chemlock® 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 INCH: 45.7 MM
  • ALL BOLT HOLES INLINE
  • BOLT CENTERLINE: 1.5 INCH: 38.1 MM
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ATP – AT OIL PUMP ORING (Part No.SO-21)

AT OIL PUMP ORING

from

$8.99
AT OIL PUMP ORING

ATP – AT OIL PUMP GASKET (Part No.SG-27)

AT OIL PUMP GASKET

from

$10.99
AT OIL PUMP GASKET

ATP – AT SHIFT KIT (Part No.JK-1)

AT SHIFT KIT

from

$75.99
AT SHIFT KIT

B & M – Shift Improver Kit For 65-87 TH400 Transmission (Part No.20260)

Shift Improver Kit For 65-87 TH400 Transmission

from

$60.99
The B&M Shift Improver Kit the easiest way to get the performance you’ve always wanted out of your automatic transmission, two modes to select from: Heavy Duty, or Street/Strip. It’s our least expensive and simplest to install kit.

Product Features:
  • Provides Crisp Shifts
  • On Any Stock Automatic Transmission
  • Eliminates Soft/Sluggish Shift
  • Eliminates Shift Overlap
  • Eliminate Clutch and Band Wear
  • Improves Transmission Life
  • Transmission Removal Not Required
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Popular 1978 GMC G15 Transmission Parts Categories

1978 GMC G15 Transmission Parts

You count on your 1978 GMC G15 to run right. That means taking care of it with regular maintenance, necessary repairs, and the right parts. Advance Auto Parts can help with all of that thanks to our extensive inventory of trusted Transmission Parts. With 126 Transmission Parts ranging in price from $1.99 to $973.99, you’re sure to find everything you need for your 1978 GMC G15.

Brands matter. If you want to shop a specific Transmission Parts brand, we stock 18 different brands like Imperial, National, and Permatex. 1978 GMC G15 Transmission Parts start as low as $1.99!

One of the best ways to find top quality OEM or aftermarket Transmission Parts is by asking professionals. Short of that, you can shop with confidence thanks to our 2,790 extensive product reviews on 1978 GMC G15 Transmission Parts. Some of the top-rated Transmission Parts products we carry are Cylindrical Bearing with 4.5 stars and Multi Purpose Seal with 4.4 stars.

Did we mention you can order your Transmission Parts from our online catalog and have them shipped right to your garage? Or, if you feel like seeing the parts first-hand, search for your nearest Advance Auto Parts location above and pick up in-store when you’re ready. Browse our full Transmission Parts inventory for your 1978 GMC G15 below to get started!

Top-Rated Transmission Parts Brands For Your 1978 GMC G15

Trusted Transmission Parts OEM and aftermarket product brands are what Advance Auto Parts specializes in. The brands we work with are sure to keep that 1978 GMC G15 running right for years to come. In our inventory you’ll find brands like Imperial, National, Permatex, and even more.

Popular Carquest Transmission Parts

You’ll find popular Carquest brand products across Automatic Transmission Parts. All are waiting to get your 1978 GMC G15 back on the road. Some of the top-rated Carquest products in these categories are:
Automatic Transmission Vacuum Modulator
from $51.05
(1)
Automatic Transmission Vacuum Modulator
Transmission Modulator Valves

FAQs for 1978 GMC G15 Transmission Parts

What are the most purchased Transmission Parts for the 1978 GMC G15?

Out of 126 Transmission Parts for the 1978 GMC G15, the most popular in our inventory are:
Ultra Grey RTV Silicone Gasket Maker, 3 OZ
from $11.49
(95)
Ultra Grey RTV Silicone Gasket Maker, 3 OZ
Transmission Pan Gaskets
Mounting Kit System
from $11.49
(27)
Mounting Kit System
Transmission Oil Cooler Fittings
Bearings
from $14.99
(21)
Bearings
Manual Transmission Output Shaft Bearings

What are the top-rated 1978 GMC G15 Transmission Parts?

Top-rated Transmission Parts for your 1978 GMC G15 based on customer reviews/ratings are:
Cylindrical Bearing
from $22.99
(20)
Cylindrical Bearing
“Great for a 1989 Pontiac Firebird 10 bolt rearend!”
Multi Purpose Seal
from $6.99
(20)
Multi Purpose Seal
“Would have been fine most likely – if correct seal was in the box. For redoing a Front Crank Seal on a 4 cylinder 89 Ranger.”
Wheel Bearing: Direct Fit, 1 Piece
from $14.99
(19)
Wheel Bearing: Direct Fit, 1 Piece
“ok”