GM TH400 Transmission Gear Vendors Overdrive Kit - Up To 1000HP

Suit GM TH400 / Turbo 400 with 4 Inch Long Tailhousing

A Gear Vendors overdrive unit bolts on to your existing transmission and allows for an electronic toggle to switch between final drive ratios so that you can lower your RPM at higher speeds, saving your engine and your wallet. Due to the phenomenal engineering and efficiency of the GearVendors Overdrive, they can handle over 2,000hp (with Heavy Duty upgrade) and the loss in wheel horsepower is less than 1 per 400hp. Gear Vendors provides overdrive products to street cars, hotrods, race cars and pickup trucks and pickups towing heavy RV's up to 25,000lbs gcvw. Add the benefits of a 0.78:1 final overdrive ratio to reduce engine rpm and increase fuel mileage by typically 20-28% and you have a product that is the single biggest innovation you can bolt to your car or truck. The easy installation also contributes to its popularity, with some simple wiring, a bolt-on installation to your transmission and a shortened driveshaft being all that's required.