4L80E GM Heavy-Duty Performance Transmission
550 HP Rated • Heavy-Duty Street • Towing • Performance Applications
Built for strength, control, and real-world driving.
This 4L80E transmission is engineered for gasoline-powered applications requiring
more durability and load capacity than an OEM or entry-level rebuild, while
maintaining smooth drivability for daily use, towing, and performance operation.
Rated for up to 550 horsepower, this build focuses on increased clutch
capacity, reinforced internal components, and stable shift control without harsh
or race-only calibration.
This is not a basic rebuild.
This is a heavy-duty performance transmission built for real-world use.
Internal Components & Features
-
2100–2400 stall torque converter included – matched for street use,
towing, and heavier gasoline-powered vehicles
- Upgraded high-energy friction plates
- New steel clutch plates
- Upgraded intermediate band
- Heavy-duty intermediate sprag assembly
- Upgraded support and case bushings
- New thrust washer set
- High-volume transmission filter
Hydraulics, Pump & Valve Body
- TransGo reprogramming kit
- Valve body calibrated for firm, consistent shifts
- Automatic valve body configuration
- Improved shift timing and pressure control for towing and work use
- New EPC solenoid
- New shift solenoids
- New internal wiring harness
- All applicable factory updates installed based on selected core
Build & Application Notice
Each transmission is built to order based on the customer’s vehicle and intended use.
Final configuration may vary depending on model year, engine combination, and drivetrain
to ensure proper fitment, reliability, and performance.
Vehicle Fitment & Core Selection
Fits GM vehicles equipped with the 4L80E from 1991–2006.
The correct transmission core is selected and built based on year, make, model,
engine configuration, and drivetrain.
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 beyond stock specifications
- Tested and inspected prior to shipment
- USA-assembled by experienced builders
All Transmission Depot transmissions are built, calibrated,
and quality-checked by Twisted Torque™.
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