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 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

Not Yet Reviewed

Estimated Ship Date: Apr 21, 2026 if ordered today

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Estimated Ship Date: Apr 21, 2026 if ordered today

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 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 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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Estimated Ship Date: Tomorrow

American Powertrain Hydramax Hydraulic Clutch Release Systems for 1965-1966 MUSTANG - HMFO02501G

Throwout Bearing Conversion, Hydraulic, Hydramax, Ford, TKO/Magnum/T-56/Richmond/TR 3650, Kit

Part Number: AWR-HMFO02501G

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

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 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 ( 3 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

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: Apr 21, 2026 if ordered today

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Estimated Ship Date: Apr 21, 2026 if ordered today

American Powertrain Manual Transmission Bellhousings BHPO-10003K

Bellhousing, OE Spec, Buick, Cadillac, Oldsmobile, Pontiac, Aluminum, Kit

Part Number: AWR-BHPO-10003K

4.5 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

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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Estimated Ship Date: Tomorrow

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 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 Hydramax Hydraulic Clutch Release Systems for 1967-1969 CAMARO, FIREBIRD - HMGM40014

Hydraulic Throwout Bearing Conversion Kits, Hydramax Hydraulic Clutch Release Systems, Push Type Slave Cylinder, Reservoir, Hoses, Chevy, Pontiac, Kit

Part Number: AWR-HMGM40014

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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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 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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American Powertrain Reverse Lockout Modules ELUN-10013

Reverse Lockout Module, Ford/Chevy T-56, Tremec Magnum, 6-Speed, Each

Part Number: AWR-ELUN-10013

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

American Powertrain Hydramax Hydraulic Clutch Release Systems for 1967-1970 MUSTANG - HMFO02601G

Throwout Bearing Conversion, Hydraulic, Hydramax, Ford, TKO/Magnum/T-56/Richmond/TR 3650, Kit

Part Number: AWR-HMFO02601G

3.0 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

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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Estimated Ship Date: Tomorrow

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 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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Estimated Ship Date: Tomorrow

American Powertrain Hydramax Hydraulic Clutch Release Systems HMGM40007

Hydraulic Throwout Bearing Conversion Kits, Hydramax Hydraulic Clutch Release Systems, Slave Cylinder, Remote Reservoir, Muncie, Tremec, Chevy, Kit

Part Number: AWR-HMGM40007

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 21, 2026 if ordered today

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Estimated Ship Date: Apr 21, 2026 if ordered today

American Powertrain Transmission Tunnels for 1960-1966 C10 PANEL, C10 PICKUP - SMGM-10005

Floor Panels, Transmission Tunnel Patch, Fiberglass, Black, Designed To Clearance Tremec TKO and T56 Transmissions, Chevy, Each

Part Number: AWR-SMGM-10005

5.0 out of 5 stars ( 2 )

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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