Choose Your Make To Find Your PerfectFitTM

GM Chevy Chevrolet Buick GMC Pontiac
Mopar Dodge Plymouth Chrysler
American Motors Corporation
TREMEC Overdrive Transmission Kits

Overdrive Transmission Kits

Crate Engines

Crate Engines

Spraker Rear Axle Assemblies

Rear Axle Assemblies

Recommended Parts

Tremec 6-Speed Reverse Lockout Control Module

The Reverse Lockout Control Module restores functionality of the Reverse Lockout Solenoid on classic cars. *Requires the optional connectors below if you don't already have them. Read More

Silver Sport Transmissions PerfectFit™ Hydraulics Kit

The Silver Sport Transmissions Hydraulic kit is the OEM style, proprietary design release bearing. It’s rated at 7000 rpms, has a forged aluminum housing, silicone dust boot, piston wiper seals and a 1,000,000 cycle service life. This bearing is well suited for everyday use. Read More

GM 621 Reproduction Bellhousing

Having a hard time locating a good Chevy 621 bellhousing that doesn't have stripped threads or cracks? Look no further because Silver Sport Transmissions produces its own version of the 621 bellhousing. This new bellhousing is cast from thick wall titanium aluminum alloy, CNC machined to provide precise location of mounting and dowel pin holes, and the center bore that locates the gearbox. Read More


The overdrive transmission kit that everyone loves

Silver Sport Transmissions modifies Tremec 5 and 6 speed transmissions to retrofit into your classic car, truck or street rod and includes any parts and accessories required to install them. Our PerfectFit™ Kits are made to last with only the highest grade parts included in our kits and all of our transmissions are quality tested for leaks, noise, and performance. No one else performs all the testing we do.

Find Out More

Latest News

Silver Sport Transmissions 1970 Corvette

A few months ago, Jack Silver purchased a 1970 Corvette with the intent of installing a TREMEC Magnum 6 speed transmission in it.  His Corvette was an LT-1(370 HP) with a 4 speed and 3.70:1 Rear Axle Ratio.

Read More

Advanced Friction Clutch Kit Silver Sport Transmissions

Advanced Friction™ Clutches are exactly what your classic needs.

Read More

TREMEC TKO Streamliner

Gallery of Doug's TREMEC TKO 5-Speed conversion.

Read More

There are some major differences between the TREMEC T-56 6-Speed that came as original equipment in several models and the aftermarket TREMEC Magnum. We'll help you sort it out!

Read More

Upcoming Shows