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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
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Results 1 - 25 of 960

Summit Racing™ Adjustable Vacuum Modulators SUM-G110

Summit Racing™ Adjustable Vacuum Modulators SUM-G110

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 )

Estimated Ship Date: Today

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B&M Vacuum Modulators 20234

B&M Vacuum Modulators 20234

B&M Vacuum Modulators 20234

Vacuum Modulator, TH350, TH400 Transmission, Each

Part Number: BMM-20234

4.9 out of 5 stars ( 29 )

Estimated Ship Date: Today

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Scott Drake Vacuum Modulators C4AZ-7A377-B

Scott Drake Vacuum Modulators C4AZ-7A377-B

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 )

Estimated Ship Date: Today

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ATI Modulator Plug Hold-Down Clamps ATI970211

ATI Modulator Plug Hold-Down Clamps ATI970211

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 )

Estimated Ship Date: Today

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American Powertrain Reverse Lockout Modules ELUN-10013

American Powertrain Reverse Lockout Modules ELUN-10013

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 )

Estimated Ship Date: Today

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Lokar Indicator Control Modules CINS-1797

Made in the USA Lokar Indicator Control Modules CINS-1797

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 )

Estimated Ship Date: Today

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ATP Automatic Transmission Modulator Valves JX-66

ATP Automatic Transmission Modulator Valves JX-66

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 )

Estimated Ship Date: Today

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TransGo Vacuum Bypass Kits VBP-VAC

TransGo Vacuum Bypass Kits VBP-VAC

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 )

Estimated Ship Date: Today

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ICT Billet Modulator Delete Plugs 551907

Made in the USA ICT Billet Modulator Delete Plugs 551907

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 )

Estimated Ship Date: Today

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ATP Automatic Transmission Modulator Valves JX-67

ATP Automatic Transmission Modulator Valves JX-67

ATP Automatic Transmission Modulator Valves JX-67

Transmission Modulator Valve, GM, TH350, Each

Part Number: ATP-JX67

4.9 out of 5 stars ( 10 )

Estimated Ship Date: Today

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TCI Adjustable Vacuum Modulators 350001TCI

TCI Adjustable Vacuum Modulators 350001TCI

TCI Adjustable Vacuum Modulators 350001TCI

Modulator, Adjustable, Automatic Transmission, TH400, Each

Part Number: TCI-350001TCI

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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ATP Automatic Transmission Modulator Valves FX-102

ATP Automatic Transmission Modulator Valves FX-102

ATP Automatic Transmission Modulator Valves FX-102

Vacuum Modulator, Ford, C-4, Each

Part Number: ATP-FX102

4.73 out of 5 stars ( 11 )

Estimated Ship Date: Today

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TCI Adjustable Vacuum Modulators 360002

Made in the USA 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 )

Estimated Ship Date: Today

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TCI Transmission Vacuum Modulators 360001

Made in the USA TCI Transmission Vacuum Modulators 360001

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 )

Estimated Ship Date: Today

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ATP Automatic Transmission Modulator Valves FX-194

ATP Automatic Transmission Modulator Valves FX-194

ATP Automatic Transmission Modulator Valves FX-194

Vacuum Modulator, Ford, C-6, Each

Part Number: ATP-FX194

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Today

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FTI Performance Billet Modulator Plugs F4051

FTI Performance Billet Modulator Plugs F4051

FTI Performance Billet Modulator Plugs F4051

Modulator Plug, Billet, TH400, Each

Part Number: FTI-F4051

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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TCI Transmission Vacuum Modulators 360003

Made in the USA TCI Transmission Vacuum Modulators 360003

TCI Transmission Vacuum Modulators 360003

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

Part Number: TCI-360003

3.75 out of 5 stars ( 4 )

Estimated Ship Date: Today

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Classic Instruments Gear Selector Sending Unit Kits SN46Z

Classic Instruments Gear Selector Sending Unit Kits SN46Z

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 )

Estimated Ship Date: Today

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MSD Atomic Transmission Control Modules 2760

MSD Atomic Transmission Control Modules 2760

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 )

Estimated Ship Date: Today

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ATP Automatic Transmission Modulator Valves FX-187

ATP Automatic Transmission Modulator Valves FX-187

ATP Automatic Transmission Modulator Valves FX-187

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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Lokar Indicator Control Modules CINS-17002

Made in the USA Lokar Indicator Control Modules CINS-17002

Lokar Indicator Control Modules CINS-17002

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

Part Number: LOK-CINS-17002

Not Yet Reviewed

Estimated Ship Date: Today

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TCI Transmission Vacuum Modulators 280001

Made in the USA TCI Transmission Vacuum Modulators 280001

TCI Transmission Vacuum Modulators 280001

Vacuum Modulator, Adjustable, GM, Powerglide, Each

Part Number: TCI-280001

4.38 out of 5 stars ( 8 )

Estimated Ship Date: Today

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TCI Adjustable Vacuum Modulators 260101

Made in the USA TCI Adjustable Vacuum Modulators 260101

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 )

Estimated Ship Date: Today

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ATI Modulator Plugs ATI407010

ATI Modulator Plugs ATI407010

ATI Modulator Plugs ATI407010

Modulator Plug, Aluminum, TH400

Part Number: ATI-407010

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Today

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TransGo Automatic Transmission Modulator Conversion Kits 46-MOD

TransGo Automatic Transmission Modulator Conversion Kits 46-MOD

TransGo Automatic Transmission Modulator Conversion Kits 46-MOD

Autmatic Transmission repair parts THM 4L60E: Vacuum Pressure Control System

Part Number: TRG-46-MOD

5.0 out of 5 stars ( 2 )

Estimated Ship Date: May 12, 2026 if ordered today

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Estimated Ship Date: May 12, 2026 if ordered today