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 +

4x4 Posi-Lok Positive Axle Engagement Systems for 1994-2002 RAM 3500, RAM 2500, 1994-2001 RAM 1500 - 400

Front Axle Actuator, Posi-Lok, Dodge, Pickup, Kit

Part Number: POS-400

4.7 out of 5 stars ( 147 )

Estimated Ship Date: Tomorrow

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4x4 Posi-Lok Positive Axle Engagement Systems 500

Front Axle Actuator, Posi-Lok, Chevy, GMC, 4WD, Kit

Part Number: POS-500

4.06 out of 5 stars ( 34 )

Estimated Ship Date: Tomorrow

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4x4 Posi-Lok Positive Axle Engagement Systems for 1997-2003 F-150, 2004 F-150 HERITAGE - 750

Front Axle Actuator, Posi-Lok, Ford, Kit

Part Number: POS-750

4.84 out of 5 stars ( 25 )

Estimated Ship Date: Tomorrow

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4x4 Posi-Lok Positive Axle Engagement Systems 450

Front Axle Actuator, Posi-Lok, Dodge, Kit

Part Number: POS-450

4.47 out of 5 stars ( 30 )

Estimated Ship Date: Tomorrow

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RT Off-Road Mechanical Axle Engagement Systems for 1984-1993 CHEROKEE, 1986-1992 COMANCHE, 1987-1995 WRANGLER - RT23003

RT Off-Road Mechanical Axle Engagement Systems for 1984-1993 CHEROKEE, 1986-1992 COMANCHE, 1987-1995 WRANGLER - RT23003

Front Axle Engagement System, Mechanical, Dana 30, Jeep, Kit

Part Number: RTO-RT23003

3.6 out of 5 stars ( 5 )

Estimated Ship Date: Tomorrow

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4x4 Posi-Lok Perm-Lok Systems 1000

"Perm-Lok" - Positive Axle Engagement System

Part Number: POS-1000

4.5 out of 5 stars ( 6 )

Estimated Ship Date: Tomorrow

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RT Off-Road Mechanical Axle Engagement Systems for 1984-1993 CHEROKEE, 1986-1992 COMANCHE, 1987-1995 WRANGLER - RT23002

Front Axle Engagement System, Mechanical, Dana 30, Jeep, Kit

Part Number: RTO-RT23002

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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4x4 Posi-Lok Front Axle Engagement Replacement Parts 100

Central Axle Disconnect Fork, Upgrade, Dodge, Jeep, W-Series, Pickup, Trailduster, Each

Part Number: POS-100

4.69 out of 5 stars ( 16 )

Estimated Ship Date: Tomorrow

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Alloy USA Axle Lock Kits for 1994-2004 RAM 1500, RAM 2500 - 450400

Axle Lock Kit, Front, Manual, Hardware, Dodge, Dana 44, Dana 60, 4WD, Kit

Part Number: ALY-450400

4.2 out of 5 stars ( 10 )

Estimated Ship Date: Tomorrow

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Alloy USA Axle Lock Kits 450500

Axle Lock Kit, Front, Manual, Hardware, Chevy, GMC, GM 7.2 in. IFS, Kit

Part Number: ALY-450500

2.33 out of 5 stars ( 3 )

Estimated Ship Date: Mar 6, 2026 if ordered today

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Estimated Ship Date: Mar 6, 2026 if ordered today

Alloy USA Axle Lock Kits for 1984-1991 CHEROKEE, 1987-1995 WRANGLER - 450920

Axle Lock Kit, Front, Manual, Hardware, 3-6 In Lift, Jeep, Dana 30, 4WD, Kit

Part Number: ALY-450920

4.33 out of 5 stars ( 3 )

Estimated Ship Date: Mar 6, 2026 if ordered today

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Estimated Ship Date: Mar 6, 2026 if ordered today

Alloy USA Axle Lock Kits for 1997-2003 F-150, 2004 F-150 HERITAGE - 450750

Axle Lock Kit, Front, Manual, Hardware, Ford, 5 Lug, 4WD, Kit

Part Number: ALY-450750

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Alloy USA Axle Lock Kits for 1985-1993 RAMCHARGER - 450450

Axle Lock Kit, Front, Manual, Hardware, Dodge, 5 Lug, 4WD, Kit

Part Number: ALY-450450

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Alloy USA Axle Lock Kits 450600

Axle Lock Kit, Front, Manual, Hardware, Chevrolet, GMC, 6 Lug, 4WD, Kit

Part Number: ALY-450600

3.25 out of 5 stars ( 4 )

Estimated Ship Date: Mar 6, 2026 if ordered today

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Estimated Ship Date: Mar 6, 2026 if ordered today

American Powertrain Hydramax Hydraulic Clutch Release Systems HMGM01101G

Throwout Bearing Conversion, Hydraulic, Hydramax, GM, TKO/TKX/Muncie/Saginaw/Richmond/Lenco, Kit

Part Number: AWR-HMGM01101SR

3.9 out of 5 stars ( 41 )

Estimated Ship Date: Tomorrow

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RideTech 1959-64 Chevy Air Suspension Systems 11060297

Air Suspension Kit, CoolRide, Front and Rear Control Arms, Panhard Bar, 59-64 Chevy B-body, Kit

Part Number: ART-11060297

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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American Powertrain Hydramax Hydraulic Clutch Release Systems for 1965-1966 MUSTANG - HMFO02501G

Throwout Bearing Conversion, Hydraulic, Hydramax, Ford, TKO/Magnum/T-56/Richmond/TR 3650, Kit

Part Number: AWR-HMFO02501G

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Powertrax Grip Pro Traction Systems GM 8.5 Inch GT201030

Differential, Grip Pro Traction System, 30-Spline, GM 8.5in., 8.6 in., Each

Part Number: PWT-GT201030

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Tomorrow

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Powertrax No-Slip Traction Systems GM 8.875 Inch (12-bolt), Car/Truck 9207883005

Differential, No-Slip Traction System, 30-Spline, GM, 12-Bolt, Each

Part Number: PWT-92-0788-3005

3.88 out of 5 stars ( 8 )

Estimated Ship Date: Tomorrow

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Hybrid Racing K-Swap Clutch Release Systems for 2002-2015 CIVIC, 2002-2006 RSX, 2004-2008 TSX - HYB-CMC-01-13

Clutch Master Cylinder and Slave Cylinder Kits, Stainless Braided Clutch Line, for use on Acura®, for use on Honda®, Kit

Part Number: HYB-HYBCMC0113

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Bowler Performance Tru-Shift Throttle Correction Systems 5011016

Automatic Transmission Kickdown Cable, Tru-Shift Throttle Correction System, Designed for Use with the Holley Sniper 2 System Only, GM, Kit

Part Number: BTM-5011016

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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American Powertrain Hydramax Hydraulic Clutch Release Systems for 1967-1968 MUSTANG - HMFO30005G

Hydraulic Throwout Bearing Conversion Kits, Hydramax Hydraulic Clutch Release Systems, Blue Slave Cylinder, Push Type, Hoses, Tremec, Ford, Kit

Part Number: AWR-HMFO30005G

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

American Powertrain Hydramax Hydraulic Clutch Release Systems for 1967-1969 CAMARO, FIREBIRD - HMGM40014

Hydraulic Throwout Bearing Conversion Kits, Hydramax Hydraulic Clutch Release Systems, Push Type Slave Cylinder, Reservoir, Hoses, Chevy, Pontiac, Kit

Part Number: AWR-HMGM40014

Not Yet Reviewed

Estimated Ship Date: Apr 13, 2026 if ordered today