4L80E GM Extreme-Duty Performance Transmission
1000+ HP Rated • Extreme Duty / Competition Use • Built to Order
Designed for maximum power, shock load, and severe-duty operation.
This 4L80E extreme-duty transmission is engineered for four-digit horsepower
applications requiring maximum internal strength, billet rotating components,
and race-oriented hydraulic control.
This build is intended for customers who have exceeded the limits of standard
performance and heavy-duty 4L80E transmissions and require a fully fortified,
application-specific unit.
This transmission is not intended for casual street use.
This is a built-to-order extreme-duty transmission.
Key Design Features
- Architecture designed for 1000+ horsepower (application dependent)
- Full billet torque-bearing rotating assembly
- Race-oriented hydraulic and clutch control strategy
- Application-specific configuration for extreme use
- Pump and valve body professionally modified and calibrated
Extreme-Duty Internal Components
- Race-grade performance friction materials and steel plates
- Heavy-duty race-spec master overhaul kit
- Upgraded bushing and support system for stability under load
- High-capacity lubrication and filtration system
- Precision thrust and end-play control for shock-load environments
Hydraulics, Pump & Valve Body
- Race-calibrated pump for maximum clutch apply force
- Application-specific valve body configuration
- Aggressive shift calibration for competition and extreme-duty use
- New EPC solenoid
- New shift solenoids
- New internal wiring harness
- All applicable factory updates installed
Billet Hard Parts & Rotating Assembly
- Billet input shaft
- Billet main shaft
- Billet forward clutch hub
- Billet overdrive planetary assembly
- Race-duty sprag and drum configuration
- Upgraded case and stator support components
Torque Converter Requirement
Torque converter not included.
A properly matched race-grade torque converter is required at this power level.
Converter selection must be based on engine output, torque curve, power adders,
vehicle weight, gearing, tire size, and intended use.
Incorrect torque converter selection can result in failure and is not
warranty eligible.
Cooling & Tuning Requirements
- External auxiliary transmission cooler required
- High-capacity cooling system mandatory for extreme-duty use
- Proper ECU / TCM tuning required
- Transmission must be calibrated to match engine output and application
Vehicle Fitment & Core Selection
Fits GM vehicles equipped with the 4L80E from 1991–2006.
Each transmission is built from the correct GM core selected based on
vehicle year, make, model, engine configuration, drivetrain, and intended use.
This listing covers all 4L80E applications within these model years.
Build Standards
- Custom built to order
- Internally fortified for extreme-duty use
- Race-oriented calibration
- Individually inspected and tested
- USA-assembled by experienced builders
All Transmission Depot transmissions are built, calibrated,
and quality-checked by Twisted Torque™.
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