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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.

Individual Parts

Results 1 - 25 of 25

Automatic Transmission Shift Kits, Valve Body Repair, C4, Kit

Part Number: TRG-SK4

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

Automatic Transmission Shift Kits, Valve Body Repair, C4, Kit

Part Number: TRG-SK4-71

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

Shift Kit, Shift Improvement, ISO-CON Valve, GM, 4L60E, 4L65E, 4L70E, 4L75E, Each

Part Number: TRG-SK4L60E

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Shift kit Ford FM/3 & FMX: 1967-72

Part Number: TRG-SK4S

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

ATP Automatic Transmission Upgrade Kit

Part Number: ATP-SK4

Not Yet Reviewed

Estimated Ship Date: Apr 29, 2026 if ordered today

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Estimated Ship Date: Apr 29, 2026 if ordered today

Automatic Transmission Shift Set, Performance, with EPC Boost Pressure Relief Valve System, for 4L80E, 4L85E, Kit

Part Number: TRG-SK4L80E

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Automatic Transmission Shift Kit, Automatic Transmission Valve Body Repair Kit, Buick, Chevrolet, Oldsmobile, Pontiac, Saturn, Volvo, Kit

Part Number: TRG-SK4T65E

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Shift Kit, TH200-4R, Kit

Part Number: TRG-SK200-4R

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

Automatic Transmission Shift Kits, Valve Body Repair, C4, Kit

Part Number: TRG-SK4SL

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

SHIFT KIT Valve Body Repair Kit, 4F27E, FNR5, FN4A-EL, FS5A-EL SHIFT KIT® Valve Body Repair Kit

Part Number: TRG-SK4F27E

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

SHIFT KIT Valve Body Repair Kit, 4L30E SHIFT KIT® Valve Body Repair Kit

Part Number: TRG-SK4L30E

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

Automatic Transmission Shift Kits, Valve Body Repair, C4, Kit

Part Number: TRG-SK4L

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

SHIFT KIT Valve Body Repair Kit, 4T60E 1991-99 SHIFT KIT® Jr. Valve Body Repair Kit

Part Number: TRG-SK4T60E-JR

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

SHIFT KIT Valve Body Repair Kit, TH325-4L SHIFT KIT® Valve Body Repair Kit

Part Number: TRG-SK325-4L

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

Automatic Shift Kit, 45RFE, 545RFE, 68RFE, Chrysler, Dodge, Jeep, Ram, Kit

Part Number: TRG-SK45RFE

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

SHIFT KIT Valve Body Repair Kit, TH440-T4, 4T60 SHIFT KIT® Jr. Valve Body Repair Kit

Part Number: TRG-SK440-JR

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

Differential Shims, Differential Carrier Shim Kits, Steel, Jeep, Toyota, Kit

Part Number: MGR-SK47

2.33 out of 5 stars ( 3 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Automatic Transmission Shift Kit, Dodge, 48RE, Kit

Part Number: TRG-SK48RE

4.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Automatic Shift Kit, THM400, Buick, Chevrolet, GMC, Oldsmobile, Pontiac, Car, Kit

Part Number: TRG-SK400

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Automatic Transmission Shift Kits, Valve Body Repair, A604, 42RLE, 41TES, 40TES, Kit

Part Number: TRG-SK42RLE-VLP

Not Yet Reviewed

Estimated Ship Date: Today

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Dodge 48RE:Converts 46/47 RE Valve Body to Shift -kitted 48RE

Part Number: TRG-SK-48RE-CV

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

SHIFT KIT Valve Body Repair Kit, TH425 SHIFT KIT® Valve Body Repair Kit

Part Number: TRG-SK425

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

CARRIER SHIMS D30 FRT JK RUBICAN

Part Number: MGR-SK48

Not Yet Reviewed

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Polaris SLINGSHOT "Jet" style "Night Series" Shift knob

Part Number: AIX-SK400J-N

Not Yet Reviewed

Estimated Ship Date: May 7, 2026 if ordered today

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Estimated Ship Date: May 7, 2026 if ordered today

Specialty Components, TH440-T4, 4T60 SHIFT KIT® Valve Body Repair Kit

Part Number: TRG-SK440-3

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

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