4L60E / 4L70E GM Performance Transmission
Heavy-Duty Street Build • 425 HP Rated • 15-Pin Connector (2006–2009)
3-Year Warranty / Unlimited Mileage (See Warranty Terms)
This 4L60E / 4L70E Performance Transmission from Transmission Depot is designed
for stock to moderately upgraded GM vehicles that need improved durability, smoother shifting,
and increased torque capacity over factory units.
Rated for up to 425 horsepower, this build is ideal for daily-driven street vehicles,
light towing, and mild performance applications.
All listed transmission components are brand new unless otherwise stated.
INTERNAL PERFORMANCE COMPONENTS
- Twisted™ HD Clutches and Steels – Improved holding power and heat resistance over stock.
- Kevlar Heavy-Duty Intermediate Band – Increased durability and improved 2nd-gear holding.
- Heavy-Duty Sprag Assembly – Improved reliability during load changes and firm shifts.
- 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
- 10-vane rotor assembly with hardened rings
- Teflon pump bushing
- All factory reliability updates applied
-
Valve Body – Modified & Updated the Twisted™ Way
- Hydraulic recalibration for smoother, more consistent shifts
- Improved shift timing and pressure control
- Reduced cross-leaks and heat buildup
HYDRAULIC & ELECTRONIC COMPONENTS
- Boost Valve Upgrade – Improves line pressure stability.
- New EPC Solenoid
- New Shift Solenoids
- New Pressure Manifold
TORQUE CONVERTER INCLUDED
- FREE Torque Converter (1600–1800 Stall)
- Smooth street engagement
- Ideal for daily driving and light towing
SUPPORTING COMPONENTS
- Premium master overhaul kit (all seals and gaskets)
- New transmission filter
- Final assembly inspection and air-check verification
APPLICATION NOTES
- GM vehicles equipped with 4L60E or 4L70E
- 2006–2009 models with 15-pin connector
- Street-driven cars and light trucks
- Light towing and mild performance use
Final configuration is based on vehicle application and intended use.
IMPORTANT NOTE
Rated for up to 425 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 425 HP
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