Do you want to have the convenience of a modern 6-speed transmission in your classic GM A-Body, but do not know what to purchase? OPGI now offers these T-56 Magnum 6-speed ProFit Conversion Kits from American Powertrain. Regardless of having a stump-pulling 600 horsepower big block or a modest 350 horsepower small block under the hood, these 6-speed T-56 Magnum transmissions are built to withstand up to 700 lb.-ft. of torque. Available in either a close ratio or wide ratio configuration, we have exactly what you are looking for your application. American Powertrain has designed these kits to be as comprehensive as possible, yet allowing for some customization to what you as the customer is looking for in the perfect transmission for your application.
Each kit includes: AP Revolution shifter mechanism for OE 4-speed position, seamless DOM driveshaft assembly, cryo hardened steel driveshaft slip yoke, transmission mount, stainless roller pilot bearing, modular reverse light harness, modular reverse lock-out harness, mechanical or electronic speedometer conversion, transmission tunnel patch, shifter knob, hardware, detailed instructions and warranty information. Close ratio Gear Ratio: 1st: 2.66, 2nd: 1.78, 3rd: 1.30, 4th: 1.00, 5th: 0.80, 6th: 0.63 Wide ratio Gear Ratio: 1st: 2.97, 2nd: 2.10, 3rd: 1.46, 4th: 1.00, 5th: 0.74, 6th: 0.50.