American Powertrain Parts and Accessories

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!

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American Powertrain Hydramax Hydraulic Clutch Release Systems HMGM01101G

Throwout Bearing Conversion, Hydraulic, Hydramax, GM, TKO/TKX/Muncie/Saginaw/Richmond/Lenco, Kit

Part Number: AWR-HMGM01101SR

3.9 out of 5 stars ( 41 )

Estimated Ship Date: Tomorrow

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American Powertrain Hydramax Hydraulic Throwout Bearings CAGM-30001P

Throwout Bearing, Hydraulic, Buick, Chevy, Oldsmobile, Pontiac, Each

Part Number: AWR-CAGM30001P

3.8 out of 5 stars ( 10 )

Estimated Ship Date: Tomorrow

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American Powertrain Manual Transmission Bellhousings BHCV-10004K

Bellhousings, New, Aluminum, Natural, Manual, Chevrolet, LS III/IV, Each

Part Number: AWR-BHCV-10004K

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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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

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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American Powertrain X-Factor Crossmembers XFGM-10101M

Transmission Crossmember, X-Factor, Steel, Black Powdercoated, Manual, Automatic, Chevy, Pontiac, Each

Part Number: AWR-XFGM10101M

4.6 out of 5 stars ( 10 )

Estimated Ship Date: Tomorrow

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American Powertrain Hydramax Hydraulic Throwout Bearings CAFO-30005HM

Throwout Bearing, Hydraulic, 3650, T-45, T-5, T-56, Tremec TKO, Ford, Each

Part Number: AWR-CAFO30005HM

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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American Powertrain Transmission Yokes DSUN-10001

Yoke, Nodular Iron, 1330, Tremec, TKO's, Magnum's, Each

Part Number: AWR-DSUN-10001

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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American Powertrain Hydramax Master Cylinder Kits HMGM-30001G

Clutch Master Cylinder, Hydramax, Cast Aluminum, Black, Buick, Chevy, GMC, Oldsmobile, Pontiac, Kit

Part Number: AWR-HMGM30001SR

2.88 out of 5 stars ( 8 )

Estimated Ship Date: Tomorrow

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American Powertrain Manual Transmission Bellhousings BHCV-10002K

Bellhousings, New, Aluminum, Natural, Manual, Chevrolet, Each

Part Number: AWR-BHCV-10002K

3.75 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

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: Jun 4, 2026 if ordered today

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Estimated Ship Date: Jun 4, 2026 if ordered today

American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits for 1956-1962 CORVETTE - COGM-C1FX

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: Jun 4, 2026 if ordered today

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Estimated Ship Date: Jun 4, 2026 if ordered today

American Powertrain Hydramax Hydraulic Clutch Release Systems for 1967-1970 MUSTANG - HMFO02603G

Throwout Bearing Conversion, Hydraulic, Hydramax, Ford, Toploader, 1 1/16 in. x 10-Spline, Kit

Part Number: AWR-HMFO02603G

3.13 out of 5 stars ( 8 )

Estimated Ship Date: Tomorrow

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American Powertrain ISO-X Transmission Mounts ISGM-20002L

Transmission Mount, ISO-X, Low Profile, Polymer, Black, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: AWR-ISGM-20002L

4.18 out of 5 stars ( 11 )

Estimated Ship Date: Tomorrow

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American Powertrain Hydramax Hydraulic Clutch Release Systems HMGM01201G

Throwout Bearing Conversion, Hydraulic, Hydramax, GM, Magnum/GM LS T-56/Viper T-56, Kit

Part Number: AWR-HMGM01201SR

5.0 out of 5 stars ( 10 )

Estimated Ship Date: Tomorrow

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American Powertrain Hydramax Hydraulic Clutch Release Systems HMCH01101G

Throwout Bearing Conversion, Hydraulic, Hydramax, Mopar, A-833, 23-Spline Input Shaft, Kit

Part Number: AWR-HMCH01101G

3.8 out of 5 stars ( 5 )

Estimated Ship Date: Tomorrow

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American Powertrain X-Factor Crossmembers XFGM-10801

Transmission Crossmember, X-Factor, Aluminum, Natural, Chevy, Pontiac, Each

Part Number: AWR-XFGM10801

4.57 out of 5 stars ( 7 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

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

Not Yet Reviewed

Estimated Ship Date: Jun 4, 2026 if ordered today

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Estimated Ship Date: Jun 4, 2026 if ordered today

American Powertrain Science Friction 180-Tooth Flywheel FWFO-10013

SCIENCE FRICTION Billet Steel 180T Flywheel for 351M/400M.

Part Number: AWR-FWFO10013

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

American Powertrain Speedometer Gears SPUN-10018

Speedometer Gear, Driven, 18-Tooth, Plastic, Yellow, Ford, Tremec, Each

Part Number: AWR-SPUN-10018

5.0 out of 5 stars ( 10 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

American Powertrain Hydramax Hydraulic Clutch Release Systems HMCH01201G

Throwout Bearing Conversion, Hydraulic, Hydramax, Mopar, TKO/Magnum/A-833, 18-Spline Input Shaft, Kit

Part Number: AWR-HMCH01201G

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

American Powertrain Hydramax Hydraulic Clutch Release Systems for 1982-1992 CAMARO, FIREBIRD - HMGM01105G

Hydraulic Throwout Bearing Conversion Kits, Hydramax Hydraulic Clutch Release Systems, Remote Reservoir, Hoses, Tremec, Chevrolet, Pontiac, Kit

Part Number: AWR-HMGM-01105G

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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American Powertrain Transmission Tunnels SMGM-10001

Patch Panel, Transmission Tunnel, Steel, Natural, GM, A-Body, Each

Part Number: AWR-SMGM10001

4.2 out of 5 stars ( 5 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

American Powertrain Speedometer Cable Adapters SPGM-10004BK

Speedometer Cable Adapters, American Powertrain Speedometer Cable Adapters, 7/8-18 Threads, Steel, Buick, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: AWR-SPGM-10004BK

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

American Powertrain Transmission Rear Seals TRUN-10001

Seal, Transmission Rear Seal, Dust Seal, TKO, Each

Part Number: AWR-TRUN-10001

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

American Powertrain Hydramax Hydraulic Clutch Release Systems for 1979-1993 MUSTANG - HMFO30004G

Throwout Bearing Conversion, Hydraulic, Hydramax, Ford, Tremec TKO/TKX/T-5/Ford 6-Speed, Kit

Part Number: AWR-HMFO30004G

Not Yet Reviewed

Estimated Ship Date: Jun 5, 2026 if ordered today

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Estimated Ship Date: Jun 5, 2026 if ordered today

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