American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits

5.0 out of 5 stars 1 Customer Reviews

American Powertrain ProFit Tremec TKX manual transmissions and installation kits put the power to the pavement with unmatched durability and versatility. Tremec has

American Powertrain ProFit Tremec TKX manual transmissions and installation kits put the power to the pavement with unmatched durability and versatility. Tremec has normally sourced their aftermarket transmissions from the OE side, such as the Magnum T-56 and the T-5, but this new design is made from the ground up as a strictly aftermarket transmission. Designed to fit classic muscle cars and customs, the TKX has a tighter, more streamlined case, and features 600 lbs.-ft. of torque capacity and are capable of engines speeds of 8,000 rpm with shifts at 7,500 rpm. The compact design provides clearance in most transmission tunnels without floor modifications, while case strength has increased from previous models with the new 3-piece aluminum housing and gaskets at all flanges simplifies installation and eliminates fluid leaks. Additional features include: * Designed with your specific vehicle application in mind * Available with multiple gear ratio configurations for compatibility for multiple applications with three shifter locations * Multi-cone synchronizers and synchronizer rings are made of sintered bronze and carbon for superior shifts * All gears are supported by caged needle bearings to reduce end play * Gears and shafts are made from ASTM 4615 grade steel and provide increased torque carrying capacity * TKX manual transmissions have 31-spline output shafts for added strength, built-in reverse light switches, and cruise control safety switches * The TKX also has separate GM and Ford case patterns and input configurations—with integrated GM and Ford transmission mount patterns * Installation kits include a driveshaft slip yoke made from cryogenically hardened steel, a polyurethane transmission mount, a steel roller pilot bearing, and a reverse light wiring harness

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American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits for 1967-1969 CAMARO, FIREBIRD - COGM-F1FX

Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, GM, F-Body, 1967-69, Kit

Part Number: AWR-COGM-F1FX

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American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits for 1967-1973 COUGAR, 1965-1973 MUSTANG - COFO-M1EX

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

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Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits for 1963-1967 CORVETTE - COGM-C2FX

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

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Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits for 1969-1974 NOVA, 1971-1974 VENTURA - COGM-X2FX

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: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits COGM-A2HMX

Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, Buick, Oldsmobile, Pontiac, A-Body, 1968-72, Kit

Part Number: AWR-COGM-A2HMX

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Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits for 1968-1972 CHEVELLE, EL CAMINO - COGM-A2FX

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

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits COGM-A1FX

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: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits COGM-T1FX

Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.82:1 Fifth Gear, Truck, Chevy/GMC, C10/C15/C1500, Kit

Part Number: AWR-COGM-T1FX

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Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits COGM-B1FX

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: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits for 1975-1981 CAMARO, FIREBIRD - COGM-F3FX

Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, GM, F-Body, 1975-81, Kit

Part Number: AWR-COGM-F3FX

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits for 1970-1974 CAMARO, FIREBIRD - COGM-F2FX

Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, GM, F-Body, 1970-74, Kit

Part Number: AWR-COGM-F2FX

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits for 1968-1976 CORVETTE - COGM-C3FX

Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, Chevy, Corvette, 1968-76, Kit

Part Number: AWR-COGM-C3FX

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

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American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits for 1963-1967 CHEVY II - COGM-X1FX

Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, Chevy, Chevy II/Nova, 1962-67, Kit

Part Number: AWR-COGM-X1FX

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits COCH-A1EX

Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, 1967-76, Mopar, A-Body, Kit

Part Number: AWR-COCH-A1EX

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits COCH-B1EX

Manual Transmission and Installation Kit Combos, ProFit Tremec TKX Manual Tansmission, 5 Gears, 1.387 in. 26-spline Input, Crossmember, Chevrolet, Kit

Part Number: AWR-COCH-B1EX

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today