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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

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

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

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


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


Dissappointed with the factory 2005-2014 Mustang transmission? The TREMEC Magnum XL may just be the answer you're searching for.

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Graveyard Carz and Magnum Foce Race Car Fabrication built a 1971 Plymouth Cuda with a 392 / 6.4 Hemi, Silver Sport Transmissions' TREMEC Magnum 6-Speed PerfectFit Kit for Ebody Mopars, and Magnum Force's Modular Suspension.

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Paddle Shifter

Designed to work with SST's A41 Automatic 4-speed transmission, as well as the EZ-TCU™ Transmission Controller, this paddle shifter features distinctive show car styling and shifting performance that’s perfect for track days or highway cruising.

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The EZ-TCU™ allows for maximum electronic control over shift points, shift firmness & shift speed. The EZ-TCU™ is fully configured and ready to run right out of the box – no tuning necessary. But for those who demand customization, the unit is also optionally fully programmable based on load, speed and RPM.

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Upcoming Shows

Mopar Nationals

Join SST at Mopar Nats, a show that offers the participant as well as the spectators three action packed days (and nights) of everything MOPAR. With 3000 cars that represent all eras of the Chrysler brands, featuring classics, muscle cars, the high-performance new models and AMC's for a one of a kind everything Mopar weekend.

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Holley LS Fest in Bowling Green KentuckyThis is a great show with loads of tricked out cars ready to prove their worth by laying down some fast times. Lots of excitement and fun to be had in Bowling Green this weekend!

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Silver Sport Transmissions will be attending Carlisle Chrysler Nationals. Come visit our tent on the Midway in front of the grandstands and ask us about our show special!  With over 2,500 Mopars on show, it will be the place to be for Mopar lovers.  The cars are arranged by year, make, and model and there are special indoor exhibits as well.  To learn more or to register your car for the show, visit Carlisle's website here.

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GoodguysJimmy "Tater" Matthews will be representing us well in the Charolette Rod & Custom's tent and on the track at Good Guys Charlotte 22nd Southeastern Nationals at Charlotte Motor Speedway. Read more for details.

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