Product Summary

Universal Fit, 6-Speed Transmission Speeds

  • Complete T56 6 speed transmission kit is perfect for hot rods and muscle cars looking for a stout transmission upgrade
  • Fits small block Chevy engines from 1955 to 1985 including 283, 305, 307, 327, and 350
  • Simplify the buying process with this complete bolt on kit
  • Add a transmission crossmember to fit your vehicle for ultimate install ease
  • Custom length drive shafts are also available to finish off the project

Comes as a Kit

Key Specs

MFG. Part #91029037
BrandSpeedway Motors
Transmission Speeds6-Speed

Need To Know

Truck Ship

Truck shipments must be pre-paid with a credit card, certified check or money order

Quick and Easy Returns

Return Policy


We understand how valuable your time is - there just never seems to be enough hours in the day to get everything accomplished. That is why we have decided to do the hard work for you by putting together these complete driveline kits to simplify your shopping experience and save you valuable time and money! We poured over countless transmission options and associated parts and pieces, finally narrowing down the best combination to finish your drivetrain install and really move your project out of the shop and out on to the open road!

This kit features one of Tremec's most notorious transmissions - the T56 Magnum 6 speed manual transmission. This ultra high performance transmission is capable of handling up to 700 ft-lb of torque. A blend of Tremec OEM technology and the best features from the TKO series, the T56 Magnum series of transmissions provides the ultimate in brute strength and the versatility to fit into any high performance build. Features the same multiple shifter locations and dual speedmeter pickups as the TKO series, as well as effortless, short throw shifting capabilities. These performance 6 speeds feature a 2.66 gear ratio with dual overdrive gears for better fuel economy when needed.

This driveline package is provided with everything you will need for a complete and seamless install for your pre-1986 2-piece style rear main seal SBC engine - clutch kit, flywheel, bell housing, throw out bearing, speedometer and reverse light harness and all the associated hardware.


MFG. Part #91029037
BrandSpeedway Motors
Transmission Speeds6-Speed
Torque700 ft./lbs.
Input Shaft Spline Count26
Output Shaft Spline Count31
Bellhousing IncludedYes
Yoke IncludedNo
Shifter IncludedNo
First Gear Ratio2.66:1
Gear Ratio (2nd)1.78:1
Gear Ratio (3rd)1.30:1
Gear Ratio (4th)1.00:1
Gear Ratio (5th)0.80:1
Gear Ratio (6th)0.64:1
NotesFor Pre-1986 2-piece style rear main seal SBC engines
Sold in QuantityKit