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.

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Results 1 - 25 of 377

Summit Racing™ Adjustable Vacuum Modulators SUM-G110

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

Part Number: SUM-G110

4.68 out of 5 stars ( 34 )

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B&M Vacuum Modulators 20234

Vacuum Modulator, TH350, TH400 Transmission, Each

Part Number: BMM-20234

4.9 out of 5 stars ( 29 )

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Scott Drake Vacuum Modulators C4AZ-7A377-B

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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ATP Automatic Transmission Modulator Valves JX-66

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

Part Number: ATP-JX66

5.0 out of 5 stars ( 14 )

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ATP Automatic Transmission Modulator Valves JX-67

Transmission Modulator Valve, GM, TH350, Each

Part Number: ATP-JX67

4.9 out of 5 stars ( 10 )

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TCI Adjustable Vacuum Modulators 360002

TCI Adjustable Vacuum Modulators 360002

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

Part Number: TCI-360002

4.8 out of 5 stars ( 5 )

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ATI Modulator Plug Hold-Down Clamps ATI970211

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

Part Number: ATI-970211

4.67 out of 5 stars ( 3 )

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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 )

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TCI Adjustable Vacuum Modulators 350001TCI

Modulator, Adjustable, Automatic Transmission, TH400, Each

Part Number: TCI-350001TCI

5.0 out of 5 stars ( 2 )

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ATP Automatic Transmission Modulator Valves FX-102

Vacuum Modulator, Ford, C-4, Each

Part Number: ATP-FX102

4.73 out of 5 stars ( 11 )

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TCI Transmission Vacuum Modulators 280001

Vacuum Modulator, Adjustable, GM, Powerglide, Each

Part Number: TCI-280001

4.38 out of 5 stars ( 8 )

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TCI Adjustable Vacuum Modulators 260101

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

Part Number: TCI-260101

4.75 out of 5 stars ( 4 )

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ATP Automatic Transmission Modulator Valves FX-194

Vacuum Modulator, Ford, C-6, Each

Part Number: ATP-FX194

5.0 out of 5 stars ( 5 )

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TCI Transmission Vacuum Modulators 360001

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

Part Number: TCI-360001

3.0 out of 5 stars ( 2 )

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Lokar Indicator Control Modules CINS-1797

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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FTI Performance Billet Modulator Plugs F4051

Modulator Plug, Billet, TH400, Each

Part Number: FTI-F4051

5.0 out of 5 stars ( 2 )

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TCI Transmission Vacuum Modulators 360003

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

Part Number: TCI-360003

3.75 out of 5 stars ( 4 )

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Classic Instruments Gear Selector Sending Unit Kits SN46Z

Control Module, Shift Indicator, Steel/Plastic, Automatic, Mopar, Ford, GM, Kit

Part Number: CIN-SN46Z

4.5 out of 5 stars ( 4 )

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TransGo Vacuum Bypass Kits VBP-VAC

Vacuum Bypass, Automatic Transmission Modulator Bypass Components, Kit

Part Number: TRG-VBP-VAC

4.13 out of 5 stars ( 8 )

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MSD Atomic Transmission Control Modules 2760

Automatic Transmission Controller, Atomic, Chevy, Ford, Lincoln, Mercury, Each

Part Number: MSD-2760

3.74 out of 5 stars ( 19 )

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ICT Billet Modulator Delete Plugs 551907

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

Part Number: ICB-551907

5.0 out of 5 stars ( 1 )

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ATP Automatic Transmission Modulator Valves FX-187

Vacuum Modulator, Ford, C-4, Each

Part Number: ATP-FX187

5.0 out of 5 stars ( 4 )

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Lokar Indicator Control Modules CINS-1798

Auto Trans Shift Indicator; Cable Operated Sensor Kit; For Ford AOD

Part Number: LOK-CINS-1798

4.5 out of 5 stars ( 2 )

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TransGo Automatic Transmission Modulator Conversion Kits 48-MOD

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

Part Number: TRG-48-MOD

Not Yet Reviewed

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ATI Modulator Plugs ATI407010

Modulator Plug, Aluminum, TH400

Part Number: ATI-407010

4.5 out of 5 stars ( 2 )

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