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Transmission & Drivetrain

Performance & Replacement Transmission & Drivetrain Parts

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 305

Vacuum Modulator, GM TH350, TH400, Push-In, Adjustable, Each

Part Number: SUM-G110

4.77 out of 5 stars ( 31 )

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Vacuum Modulator, TH350, TH400 Transmission, Each

Part Number: BMM-20234

4.89 out of 5 stars ( 27 )

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Control Module, Shift Indicator, Billet Aluminum, GM, TH350/TH400/700R4/4L60, Kit

Part Number: LOK-CINS-1797

4.8 out of 5 stars ( 5 )

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Automatic Transmission Modulators, Adjustable, Push-In, Purple Stripe, Steel, Ford, Mercury, Lincoln, C6, Each

Part Number: TCI-360002

4.75 out of 5 stars ( 4 )

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Transmission Vacuum Modulator, Ford, C-4, C-6, Each

Part Number: SDK-C4AZ-7A377-B

5.0 out of 5 stars ( 4 )

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Modulator, Adjustable, Automatic Transmission, TH400, Each

Part Number: TCI-350001TCI

Not Yet Reviewed

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

Part Number: AWR-ELUN-10013

5.0 out of 5 stars ( 3 )

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Transmission Modulator Valve, GM, TH300, TH350, TH400, Each

Part Number: ATP-JX66

5.0 out of 5 stars ( 12 )

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Modulator Delete Plug, GM, TH400, TH350, Billet Aluminum, Each

Part Number: ICB-551907

5.0 out of 5 stars ( 1 )

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Transmission Control Module, Ford, Lincoln, Mercury, Each

Part Number: RNB-609-024

1.0 out of 5 stars ( 1 )

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Vacuum Modulator, Ford, C-4, Each

Part Number: ATP-FX102

4.73 out of 5 stars ( 11 )

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Transmission Modulator Valve, GM, TH350, Each

Part Number: ATP-JX67

5.0 out of 5 stars ( 9 )

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Vacuum Modulator, Adjustable, Ford, Push-In, Green Stripe, Each

Part Number: TCI-260101

4.5 out of 5 stars ( 2 )

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Vacuum Modulator, Ford, C-6, Each

Part Number: ATP-FX194

5.0 out of 5 stars ( 4 )

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Vacuum Modulator, Adjustable, Ford, C-6, Each

Part Number: TCI-360003

3.33 out of 5 stars ( 3 )

Estimated Ship Date: Today

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Vacuum Modulator, Adjustable, GM, Powerglide, Each

Part Number: TCI-280001

4.38 out of 5 stars ( 8 )

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Automatic Transmission Modulator Upgrade, 4L80E, Vacuum Pressure Control, Kit

Part Number: TRG-48-MOD

Not Yet Reviewed

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Modulator Plug, Billet, TH400, Each

Part Number: FTI-F4051

5.0 out of 5 stars ( 2 )

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Modulator Plug, GM, Powerglide, Kit

Part Number: SOX-28738-01K

5.0 out of 5 stars ( 1 )

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Transmission Vacuum Modulator, Steel, Screw-in Style, White Strip, Ford, C-4, C-6, Each

Part Number: TCI-360001

1.0 out of 5 stars ( 1 )

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Modulator Plug Hold Down Clamp. Automatic Transmission, TH400, Each

Part Number: ATI-970211

5.0 out of 5 stars ( 2 )

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Control Module, Shift Indicator, Billet Aluminum, GM, 4L60E/4L80E, Kit

Part Number: LOK-CINS-17002

Not Yet Reviewed

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Vacuum Modulator, Ford, C-4, Each

Part Number: ATP-FX187

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

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Control Module, Shift Indicator, Billet Aluminum, Ford, C4/C6, Kit

Part Number: LOK-CINS-1799

Not Yet Reviewed

Estimated Ship Date: Aug 4, 2025 if ordered today

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Estimated Ship Date: Aug 4, 2025 if ordered today

Remanufactured Transmission Electro-Hydraulic Control Module, Buick, Cadillac, Chevy, GMC, Each

Part Number: RNB-609-009

5.0 out of 5 stars ( 1 )

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