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 2000 +

Sierra Marine Shift Cable Bellows 18-2742

Marine Drive Unit Components, Shift Shaft Boot, Each

Part Number: RRA-18-2742

Not Yet Reviewed

Estimated Ship Date: Apr 15, 2026 if ordered today

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Estimated Ship Date: Apr 15, 2026 if ordered today

Sierra Marine Drive Unit Caps 18-2382

Marine Drive Unit Components, Upper Drive Unit Cap, Each

Part Number: RRA-18-2382

Not Yet Reviewed

Estimated Ship Date: Apr 14, 2026 if ordered today

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Estimated Ship Date: Apr 14, 2026 if ordered today

Advance Adapters Saturn Overdrive Components 911236

Advance Adapters Saturn Overdrive Components 911236

Retainer, Overdrive Unit Replacement Component, Saturn, Dana 18, Each

Part Number: ADD-911236

Not Yet Reviewed

Estimated Ship Date: Today

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Sierra Marine Lower Unit Seal Kits 18-2698

Marine Drive Unit Components, Clutch Housing Seal Kit, Kit

Part Number: RRA-18-2698

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 15, 2026 if ordered today

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Estimated Ship Date: Apr 15, 2026 if ordered today

Sierra Marine Transom Seal Kits 18-8206-1

Marine Drive Unit Components, Transom Seal Kit, Mercruiser Stern Drive, Kit

Part Number: RRA-18-8206-1

Not Yet Reviewed

Estimated Ship Date: Apr 16, 2026 if ordered today

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Estimated Ship Date: Apr 16, 2026 if ordered today

Sierra Marine Lower Unit Fill Tubes 18-2448

Marine Drive Unit Components, Lower Unit Fill, Drain Kit, Kit

Part Number: RRA-18-2448

Not Yet Reviewed

Estimated Ship Date: Apr 14, 2026 if ordered today

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Estimated Ship Date: Apr 14, 2026 if ordered today

Sierra Marine Lower Unit Seal Kits 18-8360

Marine Drive Unit Components, Clutch Housing Seal Kit, Each

Part Number: RRA-18-8360

Not Yet Reviewed

Estimated Ship Date: Apr 15, 2026 if ordered today

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Estimated Ship Date: Apr 15, 2026 if ordered today

Sierra Marine Gear Kits 18-1293

Marine Drive Unit Components, Gear Set, Kit

Part Number: RRA-18-1293

Not Yet Reviewed

Estimated Ship Date: Apr 13, 2026 if ordered today

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Estimated Ship Date: Apr 13, 2026 if ordered today

Sierra Marine Water Tube Seals 18-9895

Marine Drive Unit Components, Dual Water Pickup Seal, Each

Part Number: RRA-18-9895

Not Yet Reviewed

Estimated Ship Date: Apr 14, 2026 if ordered today

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Estimated Ship Date: Apr 14, 2026 if ordered today

Sierra Marine Drive Shimming Tools 18-2285

Marine Drive Unit Components, Shim, Kit

Part Number: RRA-18-2285

Not Yet Reviewed

Estimated Ship Date: Apr 15, 2026 if ordered today

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Estimated Ship Date: Apr 15, 2026 if ordered today

Sierra Marine Prop Shafts 18-2166

Marine Drive Unit Components, Prop Shaft, Each

Part Number: RRA-18-2166

Not Yet Reviewed

Estimated Ship Date: Apr 13, 2026 if ordered today

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Estimated Ship Date: Apr 13, 2026 if ordered today

Sierra Marine Bushings 18-2622

Marine Drive Unit Components, Bell Housing Bushing, Kit

Part Number: RRA-18-2622

Not Yet Reviewed

Estimated Ship Date: Apr 16, 2026 if ordered today

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Estimated Ship Date: Apr 16, 2026 if ordered today

Sierra Marine Bearing Carriers 18-2370

Marine Drive Unit Components, Bearing Carrier, Chrysler/Force/Marine, Mercury Marine, Each

Part Number: RRA-18-2370

Not Yet Reviewed

Estimated Ship Date: Apr 13, 2026 if ordered today

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Estimated Ship Date: Apr 13, 2026 if ordered today

Sierra Marine Shift Cable Components 18-71102

Marine Drive Unit Components, Repair Kit, Control Box, Each

Part Number: RRA-18-71102

Not Yet Reviewed

Estimated Ship Date: Apr 15, 2026 if ordered today

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Estimated Ship Date: Apr 15, 2026 if ordered today

Sierra Marine Bearing Carrier Retainer Tools 18-02061

Marine Drive Unit Components, Shim, Bearing Carrier Shim, 0.010 in. Thick, Brown, Each

Part Number: RRA-18-02061

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 15, 2026 if ordered today

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Estimated Ship Date: Apr 15, 2026 if ordered today

Sierra Marine Drive Shimming Tools 18-2282

Marine Drive Unit Components, Shim, Kit

Part Number: RRA-18-2282

Not Yet Reviewed

Estimated Ship Date: Apr 14, 2026 if ordered today

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Estimated Ship Date: Apr 14, 2026 if ordered today

Sierra Marine U-Joint Assemblies 18-9218

Marine Drive Unit Components, U-Joint Assembly, Each

Part Number: RRA-18-9218

Not Yet Reviewed

Estimated Ship Date: Today

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Sierra Marine Gear Kits 18-2236

Marine Drive Unit Components, Sliding Clutch, Each

Part Number: RRA-18-2236

Not Yet Reviewed

Estimated Ship Date: Apr 14, 2026 if ordered today

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Estimated Ship Date: Apr 14, 2026 if ordered today

Sierra Marine Gear Kits 18-2402

Marine Drive Unit Components, Lower Gear Housing, Each

Part Number: RRA-18-2402

Not Yet Reviewed

Estimated Ship Date: Apr 14, 2026 if ordered today

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Estimated Ship Date: Apr 14, 2026 if ordered today

Sierra Marine Gear Kits 18-2404

Marine Drive Unit Components, Gear Repair Kit, Lower, Kit

Part Number: RRA-18-2404

Not Yet Reviewed

Estimated Ship Date: Apr 14, 2026 if ordered today

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Estimated Ship Date: Apr 14, 2026 if ordered today

Sierra Marine Retaining Rings 18-4289-9

Marine Drive Unit Components, Retaining Ring, Pair

Part Number: RRA-18-4289-9

Not Yet Reviewed

Estimated Ship Date: Apr 14, 2026 if ordered today

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Estimated Ship Date: Apr 14, 2026 if ordered today

Sierra Marine Clutch Dogs 18-1290

Marine Drive Unit Components, Clutch Dog, Each

Part Number: RRA-18-1290

Not Yet Reviewed

Estimated Ship Date: Apr 14, 2026 if ordered today

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Estimated Ship Date: Apr 14, 2026 if ordered today

Sierra Marine Anchor Screws 18-3725-9

Marine Drive Unit Components, Ball Gear Nut, Set of 5

Part Number: RRA-18-3725-9

Not Yet Reviewed

Estimated Ship Date: Apr 15, 2026 if ordered today

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Estimated Ship Date: Apr 15, 2026 if ordered today

Sierra Marine Trim Cylinder Kits 18-6752

Marine Drive Unit Components, Hydraulic Trim Pump Assembly, Metal Bracket, Kit

Part Number: RRA-18-6752

Not Yet Reviewed

Estimated Ship Date: Apr 14, 2026 if ordered today

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Estimated Ship Date: Apr 14, 2026 if ordered today

Sierra Marine Clutch Dogs 18-2287

Clutch Dog, Johnson/Evinrude, OMC, Each

Part Number: RRA-18-2287

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

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