1966 GMC I1500 Transmission Parts

Manufactured with premium materials, National needle bearings are designed and engineered to meet OE specifications.

Product Features:

• RIGHT TYPE: Needle bearings are application-specific for the repair occasion, using either caged or full complement designs
• PREMIUM MATERIALS: Precision manufactured using high-quality materials for outstanding durability and performance
• 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

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: 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

The transmission modulator valve is a vacuum operated mechanical device located on the transmission case. This valve will have a actuator rod extended into the transmission valve body inside the transmission which will control the flow of transmission fluid within the transmission to place the transmission in the most optimal forward gear selection.

Product Features:

• Application matched component ensures the transmission gear position system can be returned to like new condition.
• Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
• This part will look and function just like the original unit being replaced.

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

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; 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

Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

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

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: 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

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: -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

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

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:

• Quick Connect coupler
• Fits most 5/16″ transmission lines with 1/2″ – 20″ threads
• Simplifies transmission cooler installation
• Allows for auxiliary transmission cooler installation without cutting OE lines
• Quik-Connect Coupler – Fits most 5/16″ trans-lines with 1/2″-20 thread
• Compatible with OEM cooler systems
• Made of brass
• Quality construction

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: split-lip; 2-piece
• Temperature range: -80 Deg. F to 350 Deg. F / -62 Deg. C to 176 Deg. C
• Good dry heat resistance
• Excellent low temperature capability
• Delivers quality and reliable performance for every type of repair

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: -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

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

Powerglide Pro Lever APPLICATION: For all B&M 2 speed shifters.

Product Features:

• Contains 4 Holes
• Allows Lever Position Up
• For Non Standard Applications
• Does Not Have TV Hole
• Steel

Value-priced seal meets all cataloged application requirements.

Product Features:

• Brand may vary by location

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

Hays Twister Full Race Torque Converters feature a custom-designed anti-balloon plate to stop any converter ballooning and swelling in racing situations. These torque converters are designed for use with a trans-brake and are great for power adders such as nitrous, superchargers, and turbos. They are available with various RPM stall speed offerings to accommodate any mixture of modifications including higher compression ratios, aftermarket camshafts, aftermarket cylinder heads, lower gear ratios, and vehicle weight loss.

Product Features:

• All Full Race series converters are built, tested, and proven to support up to 1,000 horsepower
• Features a custom anti-balloon plate designed to stop potential torque converter ballooning
• Designed to handle the extreme shock and abuse of trans-brakes, nitrous oxide, superchargers, and turbochargers
• State of the art Spray Welding process is used in select areas. Spray Welding provides clean, strong and consistent fusion while also increasing strength through hardening from higher process temperature
• Each converter is hand-built and inspected in every step of assembly to ensure top of the line quality
• All Hays torque converters are internally welded compared to brazing. Testing has shown welding provides longer converter life while also enhancing consistency
• Heavy duty Torrington bearings are used for greater strength and durability
• Stators are chosen with high flow vents and channels to promote cooling in heat producing higher horsepower applications
• Increased horsepower and acceleration due to a weight saving, one application design. Almost all Hays converters are built for one application to reduce weight compared to a multi-bolt pattern converter.
• Full Race series torque converters are offered in several different stall speeds for popular automatic transmissions
• Industry leading Tech Support Team is available to provide assistance with stall speed selection

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

Hays Twister Full Race Torque Converters feature a custom designed anti-balloon plate to stop any converter ballooning and swelling in racing situations. These torque converters are designed for use with a trans-brake and great for power adders such as nitrous, superchargers, and turbos. They are available with various RPM stall speed offerings to accommodate any mixture of modifications including higher compression ratios, aftermarket camshafts, aftermarket cylinder heads, lower gear ratios, and vehicle weight loss.

Product Features:

• All Full Race series converters are built, tested, and proven to support up to 1,000 horsepower
• Features a custom anti-balloon plate designed to stop potential torque converter ballooning
• Designed to handle the extreme shock and abuse of trans-brakes, nitrous oxide, superchargers, and turbochargers
• State of the art Spray Welding process is used in select areas. Spray Welding provides clean, strong and consistent fusion while also increasing strength through hardening from higher process temperature
• Each converter is hand-built and inspected in every step of assembly to ensure top of the line quality
• All Hays torque converters are internally welded compared to brazing. Testing has shown welding provides longer converter life while also enhancing consistency
• Heavy duty Torrington bearings are used for greater strength and durability
• Stators are chosen with high flow vents and channels to promote cooling in heat producing higher horsepower applications
• Increased horsepower and acceleration due to a weight saving, one application design. Almost all Hays converters are built for one application to reduce weight compared to a multi-bolt pattern converter.
• Full Race series torque converters are offered in several different stall speeds for popular automatic transmissions
• Industry leading Tech Support Team is available to provide assistance with stall speed selection

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: -40 Deg. F to 400 Deg. F / -40 Deg. C to 204 Deg. C
• Excellent high temperature capabilities
• Compatible with wide range of fluids
• Delivers quality and reliable performance for every type of repair

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

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; 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

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: 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

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

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

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 5″ x 15-7/8″
• Compact and mid-size cars
• GVWR up to 16,000 lbs.; towing up to 2,500 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

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

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