Tremec 6-Speed T56 Transmissions

Product images may differ from actual product appearance.

These T56 transmissions are in some of the auto world's top performers: Ford Mustang Cobra, Dodge Viper, and Aston Martin Vantage & Vanquish.

Shared Features

450 ft/lbs torque capacity

Die-cast aluminum housings reduce weight

Advanced synchronizers

Tapered roller bearings on shafts minimize noise and wear

Powdered steel core blocker rings & engineered friction materials

Patented strut-type design for durability

Internal, single-rail shift system

8.13 pints of fluid required

Needle bearings under all speed gears improve high-speed performance & lessen shift effort

Two overdrives allow extended ratio coverage and closer gear ratios

Constant mesh synchronized Reverse

Ford Specs

1-1/16" 10-spline input, 31-spline output

Gear Ratios* 1st 2.97, 2nd 2.07, 3rd 1.43, 4th 1.00, 5th .80, 6th .62, Reverse 3.28
*Including GM part #957-1386000011

GM Specs

1-1/8" 26-spline input, 27-spline output

Gear Ratios** 1st 2.66, 2nd 1.78, 3rd 1.30, 4th 1.00, 5th .74, 6th .50, Reverse 2.90
**Except GM part #957-1386000011