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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

Speed Analyzer

If you ever wondered what the "Speed Analyzer" is for or how it could help you on your build, this article will give you step by step instructions and some ideas on how you can use this tool to plan your build. Whether it's a new transmission, rear axle, differential gears or just new wheels/tires, this tool can help you make the best choice for you!

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1970 Cyclone Spoiler TREMEC TKO

Dave purchased a TREMEC TKO 600 for his 1970 Mercury Cyclone Spoiler and sent us some great photos and a testimonial.

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Professional mechanics will tell you, what often seems like a major problem often has a very simple solution. When it comes to clutches, it is best to check the adjustment first. It’s the simplest, cheapest, and usually the correct solution. Here are some common problems and the different probable causes and solutions.

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Jack Silver went to Mexico and toured the TREMEC plant. Photos and more inside!

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Upcoming Shows

Pennzoil Auto Fair Charlotte Motor Speedway

Find us at Charlotte Motor Speedway this weekend at the Silver Sport Transmissions display.

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Bama Cruise

We're headed south, come join us! We'll be at the TREMEC display.

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Hot Rod Power Tour

We're hitting the highway for Hot Rod Power Tour, see us in a city near you!

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Carlisle Chrysler Nationals

Join Silver Sport Transmissions and over 2,500 vehicles from all eras of the Chrysler brand, classics, muscle cars, high-performance new models all converge on Carlisle for a one of a kind weekend. 

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