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TREMEC T56 Magnum for GM

Magnum 6-Speed for GM

Tremec T56 Magnum for GM. Need a full kit for your car? Hit the Request for Quote button to get a quote on a full installation kit. Some muscle cars will require tunnel mods to fit. Give us call and we can guide you through the fitment process. Multiple gear ratios available. Choose in the product options box. Use our speed analyzer to determine the ratios you need or give us a call at 931-646-4836
Availability: Requires truck freight
Pricing: $3,195.00

Customize Your Item

- GM Magnum Gear Ratio Options -
 * required


Magnum 6-Speed for GM, 700ft-lb constant load rated, unmodified, 26-spline input shaft, 4616 chromoly gears and shafts, one-piece counter shaft, triple cone synchros,

Optional ratios:
1st 2.66, 2nd 1.78, 3rd 1.30, 4th 1:1, 5th .80 and 6th .63 Part number 11009

1st 2.97, 2nd 2.10, 3rd 1.46, 4th 1:1, 5th .80 and 6th .63 Part number 16885

Choose gear ratios in product options box

And American Powertrain's exclusive 2 year warranty and customer first extended hour customer service.

Close Ratio version for high performance street and road racing
700 lb-ft. of torque capacity
Reasonably light at 135 lbs. dry
Multiple shifter locations & dual speedo pickups for unmatched versatility
Choice of two different gear ratio sets with unique double overdrive ratios
Incredibly short, extremely low-effort shift throws, with crisp, precise engagement
Modern OE supercar technology for the ultimate pro-tourers, road-racers, and more.


  • 8521635
  • Tremec
  • Requires truck freight
  • New

Shipping Information

  • Item Requires Shipping
  • 125.0 lbs.
  • W16.0000” x H14.0000” x L42.0000”

If you don’t know what you need call our technical sales staff at 931-646-4836
  • Tech Line Support Our tech lines are manned 7:00 AM – 7:00PM CST M-F. Plus, we have a call back service on weekends and holidays.
  • Expert Enthusiasts American Powertrain's team is manned by experienced enthusiasts with years of installation experience.
  • 2 Year Warranty Industry leading 24-month warranty from date of installations with 2-year installation grace period.
  • Fast Shipping Domestic and international shipping experts. Fast freight and overnight service available on all in stock items.