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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 2000 +

Torque Converter, Pro LS, 11 in. Diameter, Chevy, 6L80E/6L90E, 3,000-3,200 Stall, Each

Part Number: SUM-700344

4.33 out of 5 stars ( 6 )

Estimated Ship Date: Today

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Torque Converter, Pro LS, 11 in. Diameter, Chevy, 6L80E/6L90E, 2,600-2,800 Stall, Each

Part Number: SUM-700345

4.63 out of 5 stars ( 8 )

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Torque Converter, Pro LS, 11 in. Diameter, Chevy, 4L60E/4L65E/4L70E, 3,000-3,200 Stall, Each

Part Number: SUM-700340

3.9 out of 5 stars ( 10 )

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Torque Converter, Night Stalker, 12 in. Diameter, Lockup, 2,200-2,800 Stall, GM, 4L60E, 4L65E, 4L70E, 300mm, Each

Part Number: APE-49452

3.8 out of 5 stars ( 10 )

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Torque Converter, Pro LS, 11.8 in. Diameter, Chevy LS, 4L80E, 2.650 in. Hub Height, 2,600-2,800 Stall, Each

Part Number: SUM-700347

5.0 out of 5 stars ( 1 )

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Torque Converter, Pro LS, 12 in. Diameter, Chevy, 4L60E/4L65E/4L70E, 2,400-2,700 Stall, Each

Part Number: SUM-700338

4.0 out of 5 stars ( 4 )

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Torque Converters, Boss Hog LS Night Stalker Torque Converters, 2,200-2,800 RPM Stall Speed, 36 input Spline, 12.125 in. Bolt Circle, Chevy, Each

Part Number: APE-45412

Not Yet Reviewed

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Flexplate Spacer, Crankshaft, Steel, Natural, Chevy GM, LS/LSX, Gen III/IV, Includes Bolts, Kit

Part Number: SUM-704000

4.74 out of 5 stars ( 27 )

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Torque Converter, Night Stalker, 12 in. Diameter, Lockup, 1,600-2,200 Stall, GM, 4L60E, 4L65E, 300mm, Each

Part Number: APE-49451

4.5 out of 5 stars ( 10 )

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Flexplate and Hub Extension, 168-Tooth, LS Chevy Engine to GM Transmission, Each

Part Number: ADD-712500A

4.74 out of 5 stars ( 43 )

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Transmission Adapter Kit, Bellhousing Adapter, Throwout bearing spacer, Pilot bearing, Chevy LS, Aisin AR5, Kit

Part Number: SUM-LSTOAR5

5.0 out of 5 stars ( 1 )

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Torque Converters, Boss Hog LS Night Stalker Torque Converters, 2,000-2,300 RPM Stall Speed, 36 input Spline, 12.125 in. Bolt Circle, Chevy, Each

Part Number: APE-4540HD

Not Yet Reviewed

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Torque Converter, Pro LS, 11.8 in. Diameter, Chevy, 4L60E/4L65E/4L70E, 2,600-2,800 Stall, Each

Part Number: SUM-700346

4.0 out of 5 stars ( 1 )

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Torque Converter, Street Bandit, 9.6 in. Diameter, Lockup, 3,200-3,500 Stall, GM, 4L60E, 4L65E, 300mm, Each

Part Number: APE-49454

3.0 out of 5 stars ( 6 )

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Torque Converter, Street Bandit, 9.6 in. Diameter, Lockup, 3,500-4,200 Stall, GM, 4L60E, 4L65E, 300mm, Each

Part Number: APE-49455

5.0 out of 5 stars ( 1 )

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Torque Converter, Night Stalker, 12 in. Diameter, Lockup, 2,800-3,200 Stall, GM, 4L60E, 4L65E, 300mm, Each

Part Number: APE-49453

1.0 out of 5 stars ( 2 )

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Manual Transmission, GM LS T-56 Magnum 6-Speed, 1.125 in. - 26-spline Input, Aluminum Case, Slip-on Yoke, Bellhousing, Clutch, Transmission Mount, Kit

Part Number: BTM-1511012

Not Yet Reviewed

Estimated Ship Date: Mar 10, 2026 if ordered today

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Estimated Ship Date: Mar 10, 2026 if ordered today

This product may not be eligible for select promotional offers

Torque Converter, Street Bandit, 9.6 in. Diameter, Lockup, 2,400-2,800 Stall, GM, 4L60E, 4L65E, 300mm, Each

Part Number: APE-49462

Not Yet Reviewed

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Torque Converter, Street Bandit, 9.6 in. Diameter, Lockup, 2,800-3,200 Stall, GM, 4L60E, 4L65E, 300mm, Each

Part Number: APE-49463

3.5 out of 5 stars ( 2 )

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Flexplate Adapter, Pilot extension, Crankshaft Hub, Steel, Natural, Chevy GM, LS/LSX, Gen III/IV, Each

Part Number: SUM-704004

4.5 out of 5 stars ( 6 )

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Transmission Flywheel/Flexpate Bolts, USA 12.9, LS Crankshaft, Set of 6

Part Number: ICB-551926

4.0 out of 5 stars ( 5 )

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Torque Converter, Night Stalker, 12 in. Diameter, Lockup, Stock, GM, 4L60E, 4L65E, 300mm, Each

Part Number: APE-49450

3.67 out of 5 stars ( 3 )

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Torque Converter, Wild Boar Outlaw, 9.6 in. Diameter, Lockup, 2,400-2,800 Stall, GM, 6L80E, Each

Part Number: APE-45702

Not Yet Reviewed

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Flexplate Adapter, Pilot extension, Crankshaft Hub, Steel, Natural, Chevy, Small Block, LS, Each

Part Number: APE-4749E

Not Yet Reviewed

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