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Performance & Replacement Transmission & Drivetrain Parts

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Performance & Replacement Transmission & Drivetrain Parts

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Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic...

Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic and manual transmissions for street and strip applications, torque converters and clutch sets, flexplates and flywheels, plus limited-slip differentials, spools, lockers, ring and pinion sets, driveshafts, U-joints, axles, bearings, C-clip eliminator kits, transfer cases, shift kits, and rebuild kits. We also have a wide selection of trans-brakes, shifters, cables, and accessories—everything you need to put the power to the ground, Summit style.

Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic and manual transmissions for street and strip applications, torque converters and clutch sets, flexplates and flywheels, plus limited-slip differentials, spools, lockers, ring and pinion sets, driveshafts, U-joints, axles, bearings, C-clip eliminator kits, transfer cases, shift kits, and rebuild kits. We also have a wide selection of trans-brakes, shifters, cables, and accessories—everything you need to put the power to the ground, Summit style.

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Results 1 - 25 of 66

McLeod Street Extreme Clutch Kits 75321

McLeod Street Extreme Clutch Kits 75321

McLeod Street Extreme Clutch Kits 75321

Clutch Kit, Street Extreme, 1.125 in. - 26-spline, Ceramic Disc, Pressure Plate, Buick, Chevy, Pontiac, Kit

Part Number: MCL-75321

4.42 out of 5 stars ( 12 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

McLeod Street Extreme Clutch Kits 75324

McLeod Street Extreme Clutch Kits 75324

McLeod Street Extreme Clutch Kits 75324

Clutch Kit, Street Extreme, 1.125 in. - 10-spline, Ceramic Disc, Pressure Plate, Buick, Chevy, Pontiac, Kit

Part Number: MCL-75324

4.8 out of 5 stars ( 10 )

Estimated Ship Date: Today

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WIX Filters Transmission Filters 58897

WIX Filters Transmission Filters 58897

WIX Filters Transmission Filters 58897

Transmission Filter, Replacement, Each

Part Number: WIX-58897

4.81 out of 5 stars ( 26 )

Estimated Ship Date: Today

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McLeod Street Extreme Clutch Kits 75317

McLeod Street Extreme Clutch Kits 75317

McLeod Street Extreme Clutch Kits 75317

Clutch Kit, Street Extreme, 1.125 in. - 10-spline, Ceramic Disc, Pressure Plate, Buick, Chevy, Pontiac, Kit

Part Number: MCL-75317

1.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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WIX Filters Transmission Filters 58878

WIX Filters Transmission Filters 58878

WIX Filters Transmission Filters 58878

Transmission Filter, Replacement, Each

Part Number: WIX-58878

4.55 out of 5 stars ( 20 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

GearStar GM 4L80E Level 4 Transmissions GS4L804X4LT4

GearStar GM 4L80E Level 4 Transmissions GS4L804X4LT4

GearStar GM 4L80E Level 4 Transmissions GS4L804X4LT4

GM 4L80E Four wheel drive 4 speed overdrive automatic transmission. Level 4

Part Number: GES-GS4L804X4LT4

Not Yet Reviewed

Estimated Ship Date: Today

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American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1975-1986 C10, 1960-1974 C10 PICKUP, 1988-1999 C1500 - COGM-T1G

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1975-1986 C10, 1960-1974 C10 PICKUP, 1988-1999 C1500 - COGM-T1G

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1975-1986 C10, 1960-1974 C10 PICKUP, 1988-1999 C1500 - COGM-T1G

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: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1969-1974 NOVA - COGM-X2J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1969-1974 NOVA - COGM-X2J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1969-1974 NOVA - COGM-X2J

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: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1955-1957 BEL AIR - COGM-B1J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1955-1957 BEL AIR - COGM-B1J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1955-1957 BEL AIR - COGM-B1J

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: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1975-1981 CAMARO, FIREBIRD - COGM-F3J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1975-1981 CAMARO, FIREBIRD - COGM-F3J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1975-1981 CAMARO, FIREBIRD - COGM-F3J

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: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1969-1974 NOVA - COGM-X2G

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1969-1974 NOVA - COGM-X2G

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1969-1974 NOVA - COGM-X2G

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: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1970-1974 CAMARO, FIREBIRD - COGM-F2G

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1970-1974 CAMARO, FIREBIRD - COGM-F2G

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1970-1974 CAMARO, FIREBIRD - COGM-F2G

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: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1968-1972 CHEVELLE, EL CAMINO - COGM-A2J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1968-1972 CHEVELLE, EL CAMINO - COGM-A2J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1968-1972 CHEVELLE, EL CAMINO - COGM-A2J

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: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

RAM Concept 9.5 Dual-Disc Organic Clutch Kits 45-2120

RAM Concept 9.5 Dual-Disc Organic Clutch Kits 45-2120

RAM Concept 9.5 Dual-Disc Organic Clutch Kits 45-2120

Clutch Kit, Concept 9.5 Dual Disc, Organic Disc, 1 1/8 in.- 10 Spline Disc, Chevy, GMC, Kit

Part Number: RAM-45-2120

Not Yet Reviewed

Estimated Ship Date: May 1, 2026 if ordered today

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Estimated Ship Date: May 1, 2026 if ordered today

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits COGM-A1J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits COGM-A1J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits COGM-A1J

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: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

RAM Concept 9.5 Dual-Disc Organic Clutch Kits 45-2122

RAM Concept 9.5 Dual-Disc Organic Clutch Kits 45-2122

RAM Concept 9.5 Dual-Disc Organic Clutch Kits 45-2122

Clutch Kit, Concept 9.5 Dual Disc, Organic Disc, 1 1/8 in- 10 Spline Disc, Chevy, GMC, Kit

Part Number: RAM-45-2122

Not Yet Reviewed

Estimated Ship Date: May 1, 2026 if ordered today

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Estimated Ship Date: May 1, 2026 if ordered today

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1970-1974 CAMARO, FIREBIRD - COGM-F2J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1970-1974 CAMARO, FIREBIRD - COGM-F2J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1970-1974 CAMARO, FIREBIRD - COGM-F2J

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: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1967-1969 CAMARO, FIREBIRD - COGM-F1J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1967-1969 CAMARO, FIREBIRD - COGM-F1J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1967-1969 CAMARO, FIREBIRD - COGM-F1J

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: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1962-1967 CHEVY II - COGM-X1J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1962-1967 CHEVY II - COGM-X1J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1962-1967 CHEVY II - COGM-X1J

Manual Transmission and Installation Kit Combo, Tremec T-56, Aluminum Case, Chevy, Kit

Part Number: AWR-COGM-X1J

Not Yet Reviewed

Estimated Ship Date: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1975-1981 CAMARO, FIREBIRD - COGM-F3G

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1975-1981 CAMARO, FIREBIRD - COGM-F3G

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1975-1981 CAMARO, FIREBIRD - COGM-F3G

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: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1967-1969 CAMARO, FIREBIRD - COGM-F1G

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1967-1969 CAMARO, FIREBIRD - COGM-F1G

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1967-1969 CAMARO, FIREBIRD - COGM-F1G

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: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1968-1972 CHEVELLE, EL CAMINO - COGM-A2G

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1968-1972 CHEVELLE, EL CAMINO - COGM-A2G

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1968-1972 CHEVELLE, EL CAMINO - COGM-A2G

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: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1975-1986 C10, 1960-1974 C10 PICKUP, 1988-1999 C1500 - COGM-T1J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1975-1986 C10, 1960-1974 C10 PICKUP, 1988-1999 C1500 - COGM-T1J

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1975-1986 C10, 1960-1974 C10 PICKUP, 1988-1999 C1500 - COGM-T1J

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: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits COGM-A1G

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits COGM-A1G

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits COGM-A1G

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: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1955-1957 BEL AIR - COGM-B1G

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1955-1957 BEL AIR - COGM-B1G

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1955-1957 BEL AIR - COGM-B1G

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: Jun 15, 2026 if ordered today

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