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Photo of Transmission, Tremec T-56 Magnum 6-Speed 26-Spline, 2.97 1st, 0.50 6th
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TREMEC

Transmission, Tremec T-56 Magnum 6-Speed 26-Spline, 2.97 1st, 0.50 6th

Fits 1964–1977 Chevelle View fitment for 53 models
Part# : CH35245
Mfg#: TUET 11012
Sold As: Each
Ship Size: Oversize 3
$3,699.99
List Price: $4,070.95
You Save $370.96

Ships direct from manufacturer
Allow 2-6 weeks for item to arrive.
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The Aftermarket's Premier Transmission Magnum 6-speed manual transmission

The kingpin of TREMEC's high performance line-up, the Magnum double-overdrive 6-speed transmission takes the very best from TREMEC's current OEM technologies and pairs it with the most popular features of the TKO 5-speed. Able to withstand a massive 700 lb-ft. of torque while providing unbelievably crisp shifts, no other manual transmission on the planet offers as much combined strength, versatility, and general ease-of-use as the Magnum. Known in its original equipment form as the 'TR-6060', the Magnum is an aftermarket version of the same transmission found in many of today's most celebrated factory muscle cars. Multiple shifter locations, giving you refinement where you want it and strength where it counts. Can be combined with any GM engine; big block, small block, or LS when using the correct bell housing.

Clutch Fork Included: No Clutch Type: Hyd Input Shaft Diameter: 1.125" Input Shaft Spline Quantity: 26 Output Shaft Spline Quantity: 31 Pivot Ball Included: No Shifter Included : Yes Torque Capacity: 700 Yoke Included: No Yoke Style: Slip On Speedo Output: Mech/Elec 1st Gear Ratio: 2.97 2nd Gear Ratio: 2.10 3rd Gear Ratio: 1.46 4th Gear Ratio: 1.00 5th Gear Ratio: 0.74 6th Gear Ratio: 0.50 Reverse Gear Ratio: 2.90

Notes

  • Some applications will require tunnel modifications, torque arm relocation, or a new driveshaft.
  • This item is not eligible for any further discounts or promotional pricing.
  • SHIP NOTE: Item exceeds standard ground freight size/weight, and is not eligible for free ground shipping.
  • SHIP NOTE: This item is SPECIAL ORDER and will drop-ship from the manufacturer. While the majority of drop ship orders experience no delays, please be advised that OPGI does not control delivery times.

Find Item In These Catalogs

  • 2025 Cadillac 1936-1993 91
  • 2025 Chevelle, El Camino 64-77 270
  • 2025 Cutlass, F-85 & 442 61-77 173
  • 2025 GM G-Body 1978-1988 119
  • 2025 GTO, LeMans & Tempest 188
  • 2025 Monte Carlo 70-77 133
  • 2025 Riviera 1963-76 70
  • 2025 Skylark, GS & GSX 61-72 151
WARNING: This product can expose you to chemicals including lead, sulfur, nickel, chromium, vanadium, titanium, polyvinyl chloride, and 4,4’-methylenebis (2-chloroaniline), which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Vehicle Fitment

Year Make Model Application Details
1982 Buick Grand National wide ratio, 0.50 6th
1984–1987 Buick Grand National wide ratio, 0.50 6th
1976–1987 Buick Regal 1978–1987: wide ratio, 0.50 6th
1963–1976 Buick Riviera wide ratio, 0.50 6th
1961–1972 Buick Skylark wide ratio, 0.50 6th
1983–1987 Buick T-Type wide ratio, 0.50 6th
1938–1993 Cadillac 60 Special wide ratio, 0.50 6th
2013–2019 Cadillac ATS  
1965–1976 Cadillac Calais wide ratio, 0.50 6th
2003–2019 Cadillac CTS  
1959–2005 Cadillac DeVille  
1953–2002 Cadillac Eldorado 1953–1993: wide ratio, 0.50 6th
1999–2000 Cadillac Escalade  
2002–2023 Cadillac Escalade  
2002–2013 Cadillac Escalade EXT  
1954–1996 Cadillac Fleetwood 1954–1993: wide ratio, 0.50 6th
1936–1951 Cadillac Series 60 wide ratio, 0.50 6th
1936–1951 Cadillac Series 61 wide ratio, 0.50 6th
1937–1976 Cadillac Series 62 wide ratio, 0.50 6th
1936–1951 Cadillac Series 63 wide ratio, 0.50 6th
1937–1976 Cadillac Series 65 wide ratio, 0.50 6th
1936–1987 Cadillac Series 67 wide ratio, 0.50 6th
1936–1987 Cadillac Series 70 wide ratio, 0.50 6th
1936–1987 Cadillac Series 72 wide ratio, 0.50 6th
1936–1987 Cadillac Series 75 wide ratio, 0.50 6th
1976–2004 Cadillac Seville 1976–1993: wide ratio, 0.50 6th
2005–2011 Cadillac STS  
2004–2009 Cadillac XLR  
1947–1955 Chevrolet Advance Design  
1960–1987 Chevrolet C10  
1960–1987 Chevrolet C20  
1960–1987 Chevrolet C30  
1964–1977 Chevrolet Chevelle wide ratio, 0.50 6th
1960–1969 Chevrolet Corvair  
1961–1965 Chevrolet Corvair FC  
1959–1960 Chevrolet El Camino  
1964–1987 Chevrolet El Camino 1964–1977: wide ratio, 0.50 6th
1978–1987: wide ratio, 0.50 6th
1960–1987 Chevrolet K10  
1960–1987 Chevrolet K20  
1977–1987 Chevrolet K30  
1978–1983 Chevrolet Malibu wide ratio, 0.50 6th
1997–2022 Chevrolet Malibu  
1970–1988 Chevrolet Monte Carlo 1970–1977: wide ratio, 0.50 6th
1978–1988: wide ratio, 0.50 6th
1995–2007 Chevrolet Monte Carlo  
1955–1959 Chevrolet Task Force  
1947–1955 GMC Advance Design  
1960–1987 GMC C15  
1960–1987 GMC C25  
1960–1987 GMC C35  
1960–1987 GMC K15  
1960–1987 GMC K25  
1977–1987 GMC K35  
1955–1959 GMC Task Force  
1961–1988 Oldsmobile Cutlass 1961–1977: wide ratio, 0.50 6th
1978–1988: wide ratio, 0.50 6th
1958–1986 Pontiac Bonneville 1959–1977: wide ratio, 0.50 6th
1978–1986: wide ratio, 0.50 6th
1959–1977 Pontiac Catalina wide ratio, 0.50 6th
1962–1987 Pontiac Grand Prix 1962–1977: wide ratio, 0.50 6th
1978–1987: wide ratio, 0.50 6th
1964–1973 Pontiac GTO wide ratio, 0.50 6th
1961–1981 Pontiac LeMans 1961–1973: wide ratio, 0.50 6th
1961–1970 Pontiac Tempest wide ratio, 0.50 6th
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Transmission, Tremec T-56 Magnum 6-Speed 26-Spline, 2.97 1st, 0.50 6th
TREMEC Transmission, Tremec T-56 Magnum 6-Speed 26-Spline, 2.97 1st, 0.50 6th