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.

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Latest News

1970 Monte Carlo SS 454

This 1970 Monte Carlo SS 454 is equipped with our TREMEC TKO 600 PerfectFit™ Kit. Look inside for a review and lots of photos.

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Jesse Petas

The STX® Shifter came out just in time for Jesse.

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Our customers often call us about vibrations, so we thought we’d make a check list of items to help you nail down a vibration in your car or truck.

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1968 Cougar TREMEC Magnum 6-Speed T56

Matt Shuman loved taking over a 2000 mile roadtrip with his new TREMEC Magnum.

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Upcoming Shows

2017 Smoky Mountain Autofest

Just down the road a bit from our headquarters, this is sure to be a great time!

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SST will be in Vegas, look us up!

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