4L80E GM Heavy-Duty Performance Transmission
650 HP Rated • High-Power Street • Street/Strip • Heavy-Duty Applications
Built for higher horsepower, heavier vehicles, and aggressive use.
This 4L80E transmission is designed for applications exceeding basic street and towing use,
including high-horsepower street, street/strip, and heavy-duty performance builds.
Rated for up to 650 horsepower, this build incorporates increased clutch
capacity, reinforced internal components, and upgraded hydraulic control while remaining
street-drivable.
This is not a stock rebuild.
This is a heavy-duty performance transmission built for real-world power.
Internal Components & Upgrades
- Master overhaul kit with all new seals and gaskets
- New steel clutch plates
- High-energy performance friction materials
- Extra-capacity second-gear clutch assembly
- Upgraded intermediate band
- Heavy-duty intermediate sprag
- Updated direct clutch piston
- Wide kickdown band with new apply piston
- New low roller clutch assembly
Bearings, Bushings & Support Components
- New Torrington bearing kit
- New bushing kit
- New thrust washer kit
Hydraulics, Pump & Valve Body
- TransGo reprogramming kit
- Valve body updated for firm, consistent shift control
- Automatic valve body configuration
- Updated boost valve
- Updated TCC regulator valve
New Internal Electronics Package
- New internal wiring harness
- New manifold pressure switch
- New EPC solenoid
- New PWM solenoid
- New 1–2 shift solenoid
- New 3–4 shift solenoid
- New input speed sensor
- New output speed sensor
Torque Converter Requirement
Torque converter not included.
At this power level, a properly matched performance torque converter is required.
Converter selection must be based on engine output, torque curve, vehicle weight,
power adders, and intended use.
Cooling & Tuning Requirements
- External auxiliary transmission cooler required
- Factory cooler alone is not sufficient at this power level
- Standalone transmission controller required unless installed in a factory-equipped application
- Proper ECU / TCM tuning required
Vehicle Fitment & Core Selection
Fits GM vehicles equipped with the 4L80E from 1991–2006.
The transmission core is selected and built based on year, make, model,
engine configuration, drivetrain, and intended use.
This listing covers all 4L80E applications within these model years.
Build Standards
- Fully disassembled and rebuilt
- All wear components replaced with new parts
- Internally upgraded for increased torque capacity
- Inspected and tested prior to shipment
All Transmission Depot transmissions are built, calibrated,
and quality-checked by Twisted Torque™.
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