4L60E GM Performance Transmission – 2 Piece Case (1998–2005)
Heavy-Duty Street & Towing Build • 500–525 HP Rated
Built for Reliability, Strength, and Long-Term Performance
This 4L60E Performance Transmission from Transmission Depot is engineered
for customers who need more strength than stock without stepping into extreme or race-only builds.
Rated for 500–525 horsepower, this unit incorporates proven durability upgrades
to handle increased torque, towing, and spirited street use.
This is not a stock rebuild and not a race transmission.
It is a balanced, heavy-duty performance build designed for real-world reliability.
PERFORMANCE BUILD FEATURES (500–525 HP)
INTERNAL HARD-PART UPGRADES
- Twisted Torque™ HD Clutches and Steels – Increased clutch capacity and heat resistance for higher torque applications.
- Kevlar Heavy-Duty Intermediate Band – Improved 2nd-gear holding power and durability.
- 5-Pinion Rear Planetary Gearset – Distributes load more evenly for increased strength.
- Heavy-Duty Sprag Assembly – Improved durability during hard shifts and load changes.
- Hardened Heavy-Duty Sun Shell – Eliminates a common OEM failure point.
- OEM-Spec Bushing Kit – Restores proper alignment and oil control.
PUMP & VALVE BODY UPGRADES
-
Pump – Modified & Updated the Twisted™ Way
- Updated lubrication and pressure circuits
- Improved line pressure stability
- 10-vane rotor assembly with hardened rings
- Teflon pump bushing and all factory updates applied
-
Valve Body – Modified & Updated the Twisted™ Way
- Hydraulic recalibration for firmer, cleaner shifts
- Improved shift timing and pressure control
- Reduced cross-leaks and heat buildup
HYDRAULIC & ELECTRONIC COMPONENTS
- 500 Boost Valve – Increases and stabilizes line pressure under load.
- New EPC Solenoid
- New Shift Solenoids
- New Pressure Manifold
TORQUE CONVERTER INCLUDED
- FREE Stock Torque Converter (Approx. 1650 Stall)
- Street-friendly engagement
- Ideal for daily driving and light towing
SUPPORTING COMPONENTS
- Premium master overhaul kit (all seals, gaskets, and wear items)
- New transmission filter
- Final assembly inspection and air-check verification
APPLICATION NOTES
- GM vehicles equipped with 4L60E (1998–2005, 2-piece case)
- Street-driven cars and light trucks
- Light towing and performance use
Final configuration is based on vehicle application and intended use.
IMPORTANT NOTE
Rated for 500–525 horsepower in street and light towing applications.
Sustained racing, extreme abuse, or power beyond this range
may require a higher-performance transmission.
STANDARD WARRANTY APPLIES FOR BUILDS UP TO 525 HP
[ITEMPRICE]