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Transmission & Drivetrain

Performance & Replacement Transmission & Drivetrain Parts
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Performance & Replacement Transmission & Drivetrain Parts

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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Individual Parts

Results 1 - 25 of 28

Transmission Harnesses, Holley EFI, Control Harness, T-56 Magnum, Plug-and-Play, VSS, Reverse Lockout, for Terminator X, Max X ECUs, Each

Part Number: HLY-558-480

2.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Automatic Transmission Reluctor Ring, VSS 40-pulse Sensor, Clamp-on Tone Ring, Hardware, Instructions, for Stock GM Output Shaft, GM, 4L60E, Kit

Part Number: ADD-716073E

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Transmission Harness, All-In-One Transmission Wiring Harness, Manual, T-56, Ford, GM, Each

Part Number: BTM-7100000

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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Tailshaft Adapter, 6-Bolt To 4-Bolt, Billet Aluminum, Natural, GM 4L60E, 4WD, Each

Part Number: ADD-50-0405E

5.0 out of 5 stars ( 15 )

Estimated Ship Date: Today

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Automatic Transmission Conversion Wiring Harness, GM, 4L60E to 4L80E, 5.3L, 5.7L, 6.0L, Each

Part Number: ICB-WATRA30-18

1.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

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Transmission Harness, All-In-One Transmission Wiring Harness, Manual, Chevrolet, Each

Part Number: BTM-7100002

2.5 out of 5 stars ( 2 )

Estimated Ship Date: Today

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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 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 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: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 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: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 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: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 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: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 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: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 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: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 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: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 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: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 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: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 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: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 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: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 if ordered today

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 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 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: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 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: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 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: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 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: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 if ordered today

Transfer Case Adapter, Aluminum, Natural, Kit

Part Number: ADD-50-0435

4.5 out of 5 stars ( 4 )

Estimated Ship Date: Today

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Manual Transmission, Remanufactured, Five Speed, M5R2, Ford, RWD, Each

Part Number: ZUD-RMTM5R2F-8

Not Yet Reviewed

Estimated Ship Date: Apr 28, 2026 if ordered today

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Estimated Ship Date: Apr 28, 2026 if ordered today