4L65E / 4L70E / 4L75E GM Performance Transmission
Heavy-Duty Street Build • 425 HP Rated • 17-Pin Connector (2009–Up)
This 4L65E / 4L70E / 4L75E performance transmission from Transmission Depot
is engineered for improved durability, smooth shifting, and increased torque capacity
over factory units.
Rated for up to 425 horsepower, this build is ideal for daily-driven 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 stronger 2nd-gear apply.
- 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 smooth, 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 4L65E, 4L70E, or 4L75E
- 2009-Up models with 17-pin connector
- Street-driven cars and light trucks
- Light towing and mild performance use
Due to multiple bellhousing and tailhousing configurations,
2-piece units are shipped as the transmission section only.
Existing bellhousing and tailhousing are reused.
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
[ITEMPRICE]