1966 GMC I2500 Transmission Parts

Essential 1966 GMC I2500 Transmission Parts

B & M – Automatic Shifter, Pro Stick Shifter, Powerglide Transmission (Part No.80704)

Automatic Shifter, Pro Stick Shifter, Powerglide Transmission

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$436.99
The Original Pro Stick shifter delivers rock-solid performance, mixed with clean design cues and compact size. This is why you see so many Pro Stick shifters at the race track. We start off with a heavy duty steel base with a hardened steel gate plate, a

Product Features:
  • All One-Handed
  • Reverse Lockout Meets NHRA And IHRA Requirements
  • Mount Directly To Floor/Chassis/Or w/Quick Release
  • Precise Gate Action-Consistency
  • Lightweight Brushed Alum. Cover
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Felpro – Transmission Oil Pan Gasket (Part No.TOS 18608)

Transmission Oil Pan Gasket

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$8.99
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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National – Multi Purpose Seal (Part No.470380)

Multi Purpose Seal

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$4.49
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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National – Multi Purpose Seal (Part No.9316)

Multi Purpose Seal

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$17.49
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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Imperial – Transmission Oil Cooler Reinstallation Kit (Part No.248002)

Transmission Oil Cooler Reinstallation Kit

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$20.79
Provides all necessary components for the proper reinstallation of an Imperial transmission oil cooler.

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
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ACDelco – Neutral Safety Switch (Part No.D2217C)

Neutral Safety Switch

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$39.99
ACDelco Professional Neutral Safety Switch is a high quality aftermarket replacement component for one or more of the following vehicle systems: automatic transmission/transaxle, and/or manual drivetrain and axles. This premium aftermarket switch is manufactured to meet or exceed your expectations for fit, form, and function.

Product Features:
  • Professional, premium aftermarket replacement
  • Provides the performance and dependability you expect from ACDelco
  • Manufactured to meet expectations for fit, form, and function
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Imperial – High Performance Transmission Oil Cooler (Part No.240512)

High Performance Transmission Oil Cooler

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$67.99
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
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National – Multi Purpose Seal (Part No.9613S)

Multi Purpose Seal

from

$7.99
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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B & M – Holeshot 2400 (Part No.70411)

Holeshot 2400

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$543.99
A higher than stock stall speed as delivered by the Holeshot converter will provide several advantages and benefits in vehicles with modified engines. Many modifications, particularly big cams, tend to reduce low end power and torque. The high stall converter allows the engine to launch the car at higher rpm where more torque is available. The Holeshot is generally a very good choice for the typical street machine that is looking for better launch capability and more strength. Street rods with modified engines will also benefit from a Holeshot converter. If your vehicle is equipped with a plate type nitrous system, you will need a Nitrous Holeshot!! Stall speed listings are based on engines producing 230lb. ft. of torque at 2,500 rpm. More torque at 2,500 rpm will give you more stall speed, less torque at 2,500 rpm will give you less stall speed than the stall speed ratings indicated. Furnace brazed impeller. New precision steel alloy pump drive tube. New heavy duty needle bearing between stator and impeller (not a thrust washer). Needle bearing between stator and turbine. Furnace brazed turbine. Dual pattern drive lugs on some GM Holeshots. New turbine hub. New springs and rollers in stator.

Product Features:
  • Furnace Brazed Impeller
  • Steel Alloy Pump Drive Tube
  • Heavy Duty Needle Bearing
  • Between Stator and Turbine
  • Furnace Brazed Turbine
  • New Turbine Hub
  • New Springs/Rollers In Stator
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National – Bearings (Part No.307-L)

Bearings

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$39.49
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
  • Controlled heat treating process for lasting performance and extended bearing life
  • Industry leading coverage
  • Professional technicians know they can depend on National
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National – Bearings (Part No.A-3)

Bearings

from

$14.99
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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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
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Felpro – Manual Transmission Gasket Set (Part No.TS 30118)

Manual Transmission Gasket Set

from

$24.49
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
  • Engineered and manufactured specifically for the repair environment
  • Unsurpassed quality you can trust
  • Includes all parts needed to complete the repair
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Felpro – Manual Transmission Gasket Set (Part No.TS 5100)

Manual Transmission Gasket Set

from

$13.99
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
  • Engineered and manufactured specifically for the repair environment
  • Unsurpassed quality you can trust
  • Includes all parts needed to complete the repair
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National – Shaft Repair Sleeve (Part No.99176)

Shaft Repair Sleeve

from

$46.49
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:
  • Designed to repair damaged, grooved or worn shafts
  • Durable stainless steel construction for corrosion-free sealing surface that surpasses most original shaft specifications
  • Ideal for a shaft where indications of seal wear, such as tracks or grooves have developed
  • Ultra-thin construction (0.01/0.25mm wall thickness) allows original seal size to be used with minimal additional lip loading
  • Easy to install with removable flange and installation tool
  • Installation tool reduces sleeve distortion and allows for installation without removal from the shaft
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Driveworks – Oil Seal Kit (Part No.S-5200)

Oil Seal Kit

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$6.79
Value-priced seal meets all cataloged application requirements.

Product Features:
  • Brand may vary by location
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Carquest – Automatic Transmission Vacuum Modulator (Part No.VM115)

Automatic Transmission Vacuum Modulator

from

$48.95
High-quality products that meet OE appearance and performance to provide professional technicians and DIYers with a cost-effective solution.

Product Features:
  • Designed to OE standards for ease of installation
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Driveworks – Oil Seal (Part No.S-6712NA)

Oil Seal

from

$6.29
Value-priced seal meets all cataloged application requirements.

Product Features:
  • Brand may vary by location
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B & M – Cast Powerglide Transmission Pan (Part No.70280)

Cast Powerglide Transmission Pan

from

$256.99
B&M Deep Transmission Pans increase the fluid capacity of your transmission, improving the cooling, allowing your transmission to work as efficiently as possible. Included drain plug, eliminates the need to drop the pan to drain the fluid.

Product Features:
  • Additional Oil Capacity
  • More Cooling Ability
  • No Dipstick Modification
  • Some Include Fluid Pickup Extension
  • Built-In Drain Plugs
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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
See More

National – Bearings (Part No.2720)

Bearings

from

$12.49
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
See More

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

Multi Purpose Seal

from

$6.99
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

1966 GMC I2500 Transmission Parts

You count on your 1966 GMC I2500 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 46 Transmission Parts ranging in price from $4.49 to $973.99, you’re sure to find everything you need for your 1966 GMC I2500.

Brands matter. If you want to shop a specific Transmission Parts brand, we stock 9 different brands like Imperial, National, and DriveWorks. 1966 GMC I2500 Transmission Parts start as low as $4.49!

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 239 extensive product reviews on 1966 GMC I2500 Transmission Parts. Some of the top-rated Transmission Parts products we carry are Multi Purpose Seal with 4.4 stars and Plate and Fin Style Trans Cooler 3/4" x 9-1/2" x 11" Heavy Duty with 4.5 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 1966 GMC I2500 below to get started!

Top-Rated Transmission Parts Brands For Your 1966 GMC I2500

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 1966 GMC I2500 running right for years to come. In our inventory you’ll find brands like Imperial, National, DriveWorks, and even more.

Popular Carquest Transmission Parts

You’ll find popular Carquest brand products across Back Up Neutral Safety Parts. All are waiting to get your 1966 GMC I2500 back on the road. Some of the top-rated Carquest products in these categories are:
Neutral Safety Switch
from $31.05
(1)
Neutral Safety Switch
Back Up and Neutral Safety Switches

FAQs for 1966 GMC I2500 Transmission Parts

What are the most purchased Transmission Parts for the 1966 GMC I2500?

Out of 46 Transmission Parts for the 1966 GMC I2500, the most popular in our inventory are:
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
Econo-Kool® Transmission Oil Cooler
from $39.99
(10)
Econo-Kool® Transmission Oil Cooler
OE Transmission Coolers

What are the top-rated 1966 GMC I2500 Transmission Parts?

Top-rated Transmission Parts for your 1966 GMC I2500 based on customer reviews/ratings are:
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.”
Plate and Fin Style Trans Cooler 3/4" x 9-1/2" x 11" Heavy Duty
from $80.99
(8)
Plate and Fin Style Trans Cooler 3/4" x 9-1/2" x 11" Heavy Duty
“Used this cooler to replace the missing factory one on my Polaris 330 ATV. Made an adapter plate to fit to the fan housing. Works great, beats the $30”
Multi Purpose Seal
from $7.99
(8)
Multi Purpose Seal
“This seal should be located at the REAR of the TRANS, in FRONT of the TRANSFER CASE, BETWEEN trans and transfer case.”