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When it’s time to upgrade your transmission, turn to the torque transfer pros at American Powertrain! They specialize in Tremec 5- and 6-speed gearboxes and also...
When it’s time to upgrade your transmission, turn to the torque transfer pros at American Powertrain! They specialize in Tremec 5- and 6-speed gearboxes and also build a full line of accessories and installation kits designed to make your next swap go like clockwork. Summit Racing offers American Powertrain transmissions, transmission installation kits, crossmembers, flywheels, clutch pedal assemblies, and more—everything you need to convert your muscle car to modern drivetrain technology. Make the shift to American Powertrain—shop now!
When it’s time to upgrade your transmission, turn to the torque transfer pros at American Powertrain! They specialize in Tremec 5- and 6-speed gearboxes and also build a full line of accessories and installation kits designed to make your next swap go like clockwork. Summit Racing offers American Powertrain transmissions, transmission installation kits, crossmembers, flywheels, clutch pedal assemblies, and more—everything you need to convert your muscle car to modern drivetrain technology. Make the shift to American Powertrain—shop now!
Showing In Stock Items. Show All 132 Items.
Manual Transmission and Installation Kit Combo, Tremec T-56, Aluminum Case, Chevy, Kit
Part Number: AWR-COGM-X1J
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Transmission Combo, Tremec T-56, 6-Speed, Chevy, 2.66:1 First Gear, 0.63:1 Fifth Gear, Kit
Part Number: AWR-COGM-T1G
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Transmission Combo, Tremec T-56, 6-Speed, Chevy, 2.97:1 First Gear, 0.50:1 Fifth Gear, Kit
Part Number: AWR-COGM-T1J
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Combo, ProFit, Close Ratio, T-56 Magnum, 6-Speed, 1968-72 GM A-Body, 2.66:1 First Gear, 0.63:1 Sixth, Kit
Part Number: AWR-COGM-A2G
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Combo, ProFit, Wide Ratio, T-56 Magnum, 6-Speed, 1968-72 GM A-Body, 2.97:1 First Gear, 0.50:1 Sixth, Kit
Part Number: AWR-COGM-A2J
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Combo, ProFit, Close Ratio, T-56 Magnum, 6-Speed, 1955-57 Tri-5 Chevy, 2.66:1 First Gear, 0.63:1 Sixth, Kit
Part Number: AWR-COGM-B1G
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Combo, ProFit, Wide Ratio, T-56 Magnum, 6-Speed, 1955-57 Tri-5 Chevy, 2.97:1 First Gear, 0.50:1 Sixth, Kit
Part Number: AWR-COGM-B1J
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Combo, ProFit, Close Ratio, T-56 Magnum, 6-Speed, 1967-69 GM F-Body, 2.66:1 First Gear, 0.63:1 Sixth, Kit
Part Number: AWR-COGM-F1G
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Combo, ProFit, Wide Ratio, T-56 Magnum, 6-Speed, 1967-69 GM F-Body, 2.97:1 First Gear, 0.50:1 Sixth, Kit
Part Number: AWR-COGM-F1J
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Combo, ProFit, Close Ratio, T-56 Magnum, 6-Speed, 1970-74 GM F-Body, 2.66:1 First Gear, 0.63:1 Sixth, Kit
Part Number: AWR-COGM-F2G
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Combo, ProFit, Wide Ratio, T-56 Magnum, 6-Speed, 1970-74 GM F-Body, 2.97:1 First Gear, 0.50:1 Sixth, Kit
Part Number: AWR-COGM-F2J
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Combo, ProFit, Close Ratio, T-56 Magnum, 6-Speed, 1964-67 GM A-Body, 2.66:1 First Gear, 0.63:1 Sixth, Kit
Part Number: AWR-COGM-A1G
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Combo, ProFit, Wide Ratio, T-56 Magnum, 6-Speed, 1964-67 GM A-Body, 2.97:1 First Gear, 0.50:1 Sixth, Kit
Part Number: AWR-COGM-A1J
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Combo, ProFit, Close Ratio, T-56 Magnum, 6-Speed, 1975-81 GM F-Body, 2.66:1 First Gear, 0.63:1 Sixth, Kit
Part Number: AWR-COGM-F3G
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Combo, ProFit, Wide Ratio, T-56 Magnum, 6-Speed, 1975-81 GM F-Body, 2.97:1 First Gear, 0.50:1 Sixth, Kit
Part Number: AWR-COGM-F3J
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Combo, ProFit, Close Ratio, T-56 Magnum, 6-Speed, 1968-74 Chevy Nova, 2.66:1 First Gear, 0.63:1 Sixth, Kit
Part Number: AWR-COGM-X2G
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Combo, ProFit, Wide Ratio, T-56 Magnum, 6-Speed, 1968-74 Chevy Nova, 2.97:1 First Gear, 0.50:1 Sixth, Kit
Part Number: AWR-COGM-X2J
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Bellhousing, Cast Aluminum, Chevy, Buick, Oldsmobile, Pointiac, V8, Tremec T56 Magnum, Each
Part Number: AWR-BHCV-10010
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, GM, A-Body, 1964-67, Kit
Part Number: AWR-COGM-A1FX
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, Ford, Cougar, Mustang 1965-73, Kit
Part Number: AWR-COFO-M1EX
Not Yet Reviewed
Estimated Ship Date: Dec 1, 2025 if ordered today
Estimated Ship Date: Dec 1, 2025 if ordered today
Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, Chevy, Corvette, 1963-67, Kit
Part Number: AWR-COGM-C2FX
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, Chevy, A-Body, 1968-72, Kit
Part Number: AWR-COGM-A2FX
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, Chevy, Tri-5, 1955-57, Kit
Part Number: AWR-COGM-B1FX
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, Chevy, Corvette, 1956-62, Kit
Part Number: AWR-COGM-C1FX
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, Chevy, Pontiac, Nova, Ventura, 1968-74, Kit
Part Number: AWR-COGM-X2FX
Not Yet Reviewed
Estimated Ship Date: Nov 28, 2025 if ordered today
Estimated Ship Date: Nov 28, 2025 if ordered today
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