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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.
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Transmission Harness, All-In-One Transmission Wiring Harness, Manual, T-56, Ford, GM, Each
Part Number: BTM-7100000
Estimated Ship Date: Today
Estimated Ship Date: Today
Automatic Transmission Conversion Wiring Harness, GM, 4L60E to 4L80E, 5.3L, 5.7L, 6.0L, Each
Part Number: ICB-WATRA30-18
Estimated Ship Date: Today
Estimated Ship Date: Today
Transmission Harness, All-In-One Transmission Wiring Harness, Manual, Chevrolet, Each
Part Number: BTM-7100002
Estimated Ship Date: Today
Estimated Ship Date: Today
Internal Wiring Harness, Upgrade, GM, Style Harness, Each
Part Number: TCI-276610
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
This product may not be eligible for select promotional offers
Repair Harness
Part Number: ATP-HE-1
Not Yet Reviewed
Estimated Ship Date: Nov 24, 2026 if ordered today
Estimated Ship Date: Nov 24, 2026 if ordered today
Automatic Transmission Wiring Harnesses, Replacement, Audi, Mini, Volkswagen, Each
Part Number: ATP-RE-80
Not Yet Reviewed
Estimated Ship Date: Nov 24, 2026 if ordered today
Estimated Ship Date: Nov 24, 2026 if ordered today
Transmission Harnesses, Holley EFI, Control Harness, T-56 Magnum, Plug-and-Play, VSS, Reverse Lockout, for Terminator X, Max X ECUs, Each
Part Number: HLY-558-480
Estimated Ship Date: Today
Estimated Ship Date: Today
This product may not be eligible for select promotional offers
Wiring Harness, EZ-TCU Transmission Controller Main Harness, Each
Part Number: TCI-30261
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
This product may not be eligible for select promotional offers
Wiring Harness, Jeep JL/JT Z-Locker Extension Harness, Extension Harness Only, Jeep, Each
Part Number: ZAU-Z-LKR-EXT
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Transmission Harness, Replacement, 20-Pin Pigtail, GM Automatic Transmission, Gray Connector, 12 in. Wire Leads, Butt-Style Connectors, Each
Part Number: FLE-S0507
Estimated Ship Date: Today
Estimated Ship Date: Today
Transmission Harnesses, Automatic Transmission Controller Harnesses, for Use with ATI PCS Transmission Control Unit 705500, GM, 4L80-E/4L85-E, Each
Part Number: ATI-705502
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Transmission Harnesses, Atomic Transmission Control Module Harnesses, 4 ft. Extension for MSD Atomic Transmission Controllers Only, Ford, GM, Each
Part Number: MSD-27621
Estimated Ship Date: Nov 25, 2026 if ordered today
Estimated Ship Date: Nov 25, 2026 if ordered today
This product may not be eligible for select promotional offers
Harness TCU Distributor
Part Number: TCI-377100
Not Yet Reviewed
Estimated Ship Date: Dec 29, 2026 if ordered today
Estimated Ship Date: Dec 29, 2026 if ordered today
This product may not be eligible for select promotional offers
Automatic Transmission Wiring Harnesses, Replacement, for use on Acura®, for use on Honda®, Each
Part Number: ATP-HE-17
Not Yet Reviewed
Estimated Ship Date: Nov 24, 2026 if ordered today
Estimated Ship Date: Nov 24, 2026 if ordered today
Repair Harness
Part Number: ATP-JE-33
Not Yet Reviewed
Estimated Ship Date: Nov 24, 2026 if ordered today
Estimated Ship Date: Nov 24, 2026 if ordered today
Repair Harness
Part Number: ATP-FE-13
Not Yet Reviewed
Estimated Ship Date: Nov 24, 2026 if ordered today
Estimated Ship Date: Nov 24, 2026 if ordered today
Repair Harness
Part Number: ATP-FE-11
Not Yet Reviewed
Estimated Ship Date: Nov 24, 2026 if ordered today
Estimated Ship Date: Nov 24, 2026 if ordered today
DASH TO ENGINE GAUGE FEED WIRE TAG
Part Number: MMU-MA5624
Not Yet Reviewed
Estimated Ship Date: Dec 22, 2026 if ordered today
Estimated Ship Date: Dec 22, 2026 if ordered today
Wiring Harness, Jeep JL/JT Z-Locker OEM Controller Harness, for Use with OEM Lockers, Jeep, Each
Part Number: ZAU-Z-LKR-OEM
Estimated Ship Date: Today
Estimated Ship Date: Today
Wiring Harness, Jeep JL/JT Z-Locker Controller Harness, for Use with Aftermarket E-Lockers or Air Lockers, Jeep, Each
Part Number: ZAU-Z-LKR-CTLR
Estimated Ship Date: Today
Estimated Ship Date: Today
Wiring Harness, Ultimate E-Locker, Low Pinion Style, Rear, Toyota, Each
Part Number: LRO-TDIELWHLPR
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Wiring Harness, Vacuum, Front Axle, Dodge, Truck, Each
Part Number: MOP-52105317AB
Estimated Ship Date: Today
Estimated Ship Date: Today
1968-76 Neutral Safety Switch Repair Harness; with 3 Prong Connector
Part Number: OER-MD6417
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Wiring Harness, Toyota E-Locker Wiring Harness Kit - Low Pinion Front
Part Number: LRO-TDIELWHLPF
Not Yet Reviewed
Estimated Ship Date: Nov 30, 2026 if ordered today
Estimated Ship Date: Nov 30, 2026 if ordered today
Wiring Harness, Toyota E-Locker Wiring Harness Kit - High Pinion Rear
Part Number: LRO-TDIELWHHPR
Not Yet Reviewed
Estimated Ship Date: Nov 30, 2026 if ordered today
Estimated Ship Date: Nov 30, 2026 if ordered today
