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 101

Sierra Marine Intake Manifold Gaskets 18-0869-9

Gaskets, Manifold, Transfer Port Cover, Stock Replacement, Chrysler/Force/US Marine, Pair

Part Number: RRA-18-0869-9

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

Summit Racing™ TH350 Automatic Transmission SUM-700310-X

Automatic Transmission, Forward Shift Pattern, Automatic Valve Body, Chevy, 600 HP, TH350, Each

Part Number: SUM-700310-X

2.86 out of 5 stars ( 7 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Sierra Marine Intake Manifold Gaskets 18-0981-9

Gaskets, Manifold, Intake, Stock Replacement, Johnson/Evinrude Outboard, Pair

Part Number: RRA-18-0981-9

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

Sierra Marine Intake Manifold Gaskets 18-0991-9

Gaskets, Manifold, Intake, Stock Replacement, Johnson/Evinrude Outboard, Pair

Part Number: RRA-18-0991-9

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

ATP Automotive Automatic Transmission Rebuild Kits JE-10

AT PRESS SW MANIFOLD

Part Number: ATP-JE10

Not Yet Reviewed

Estimated Ship Date: Dec 10, 2025 if ordered today

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Estimated Ship Date: Dec 10, 2025 if ordered today

ATI Performance Products Automatic Transmission Rebuild Components ATI703539

4L60E, 4L65E, 4L70E, MANIFOLD PRESSURE SWITCH

Part Number: ATI-ATI703539

Not Yet Reviewed

Estimated Ship Date: Dec 1, 2025 if ordered today

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Estimated Ship Date: Dec 1, 2025 if ordered today

ATP Automotive Automatic Transmission Rebuild Components JE-44

Auto Trans Pressure Switch Manifold

Part Number: ATP-JE-44

Not Yet Reviewed

Estimated Ship Date: Dec 10, 2025 if ordered today

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Estimated Ship Date: Dec 10, 2025 if ordered today

ATP Automotive Automatic Transmission Rebuild Kits JE-13

AT PRESS SW MANIFOLD

Part Number: ATP-JE13

Not Yet Reviewed

Estimated Ship Date: Dec 10, 2025 if ordered today

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Estimated Ship Date: Dec 10, 2025 if ordered today

ATP Automotive Automatic Transmission Rebuild Kits JE-9

AT PRESS SW MANIFOLD

Part Number: ATP-JE9

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Dec 10, 2025 if ordered today

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Estimated Ship Date: Dec 10, 2025 if ordered today

Lokar Hi-Tech Kickdown Kits KD-2AODHT

Lokar Hi-Tech Kickdown Kits KD-2AODHT

Automatic Transmission Kickdown Cable, Hi-Tech, Natural Braided Stainless Steel, Natural Aluminum Fittings, Ford, Lincoln, Mercury, AOD, Kit

Part Number: LOK-KD2AODHT

4.88 out of 5 stars ( 52 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

GearStar GM 4L65E Level 3 Transmissions GS4L65EL3

Automatic Transmission, Up to 500 hp/500 ft. lbs, Rated Max, Level 3, 4L65E, RWD, 2,600 - 3,200 Stall, LS Bellhousing, Chevrolet, Kit

Part Number: GES-GS4L65EL3

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

GearStar GM 4L80E Level 4 Transmissions GS4L80ELSL4

Automatic Transmission, Up to 800 hp/700 ft. lbs, Rated Max, Level 4, 4L80E, RWD, 2,800 - 3,400 Stall, LS Bellhousing, Chevrolet, Kit

Part Number: GES-GS4L80ELSL4

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Lokar Hi-Tech Kickdown Kits KD-2700HT

Automatic Transmission Kickdown Cable, Hi-Tech, Braided Stainless Steel, Natural Aluminum Fittings, GM, 700R4, Kit

Part Number: LOK-KD-2700HT

4.85 out of 5 stars ( 34 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

GearStar GM 4L65E Level 4 Transmissions GS4L65EL4

Automatic Transmission, Up to 650 hp/600 ft. lbs, Rated Max, Level 4, 4L65E, RWD, 2,600 - 4,000 Stall, LS Bellhousing, Chevrolet, Kit

Part Number: GES-GS4L65EL4

3.5 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Lokar Hi-Tech Kickdown Kits KD-2350HT

Automatic Transmission Kickdown Cable, Hi-Tech, Natural Braided Stainless Steel, Natural Aluminum Fittings, GM, TH350, Kit

Part Number: LOK-KD-2350HT

4.89 out of 5 stars ( 38 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Lokar Hi-Tech Kickdown Kits KD-2727HT

Automatic Transmission Kickdown Cable, Hi-Tech, Natural Braided Stainless Steel, Natural Aluminum Fittings, Torqueflite 727, Kit

Part Number: LOK-KD-2727HT

4.62 out of 5 stars ( 58 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

GearStar GM 4L80E Level 3 Transmissions GS4L80ELSL3

Automatic Transmission, Up to 600 hp/600 ft. lbs, Rated Max, Level 3, 4L80E, RWD, 2,600 - 3,600 Stall, LS Bellhousing, Chevrolet, Kit

Part Number: GES-GS4L80ELSL3

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

Lokar Hi-Tech Kickdown Kits KD-2400HT

Automatic Transmission Kickdown Cable, Hi-Tech, Natural Braided Stainless Steel, Natural Aluminum Fittings, GM, TH400, Kit

Part Number: LOK-KD2400HT

4.63 out of 5 stars ( 19 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Lokar Hi-Tech Kickdown Kits KD-20C6HT

Automatic Transmission Kickdown Cable, Hi-Tech, Natural Braided Stainless Steel, Natural Aluminum Fittings, Ford, Lincoln, Mercury, C-6, Kit

Part Number: LOK-KD-20C6HT

4.73 out of 5 stars ( 30 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Lokar Hi-Tech Kickdown Kits KD-20C4HT

Automatic Transmission Kickdown Cable, Hi-Tech, Natural Braided Stainless Steel, Natural Aluminum Fittings, Ford, Lincoln, Mercury, C-4, Kit

Part Number: LOK-KD-20C4HT

4.95 out of 5 stars ( 21 )

Estimated Ship Date: Today

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Sonnax Heavy-Duty Remanufactured Valve Bodies GM054-HD

Automatic Transmission Valve Body, Heavy-Duty Remanufactured, Automatic Style, Cast Aluminum, Forward Shift Pattern, 4L60-E/4L65-E, Chevrolet, Kit

Part Number: SOX-GM054-HD

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Lokar Midnight Series Stainless Steel Hi-Tech Kickdown Kits XKD-2700HT

Automatic Transmission Kickdown Cable, Midnight Series Hi-Tech, Black Braided Stainless Steel, Black Aluminum Fittings, GM, 700R4, Kit

Part Number: LOK-XKD2700HT

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Lokar Hi-Tech Kickdown Kits KD-2AODU

Automatic Transmission Kickdown Cable, Hi-Tech, Black Vinyl, Natural Aluminum Fittings, Ford, AOD, Kit

Part Number: LOK-KD-2AODU

4.84 out of 5 stars ( 19 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Lokar Hi-Tech Kickdown Kits KD-2350U

Automatic Transmission Kickdown Cable, Hi-Tech, Black Vinyl, Natural Aluminum Fittings, GM, TH350, Kit

Part Number: LOK-KD-2350U

4.52 out of 5 stars ( 33 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Lokar Transmission Kickdown Brackets SRK-4003

Kickdown Cable Bracket, Stainless Steel, Polished, Holley, Edelbrock, Carter, Rochester, Each

Part Number: LOK-SRK-4003

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Lokar Midnight Series Stainless Steel Hi-Tech Kickdown Kits XKD-2400HT

Automatic Transmission Kickdown Cable, Midnight Series Hi-Tech, Black Braided Stainless Steel, Black Aluminum Fittings, GM, TH400, Kit

Part Number: LOK-XKD-2400HT

4.38 out of 5 stars ( 8 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

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