45RFE / 545RFE Performance Transmission – 550 HP Rated (2003 & Up)
Heavy-Duty Street & Towing Build • Built to Order
3-Year Warranty / Unlimited Mileage (See Warranty Terms)
This 45RFE / 545RFE Performance Transmission is engineered for higher torque loads,
improved shift control, and long-term durability in Dodge, Jeep, and Chrysler applications.
Rated for up to 550 horsepower, this build includes upgraded internals, pressure control
improvements, and application-specific calibration.
All listed transmission components are brand new unless otherwise stated.
INCLUDED COMPONENTS
- HD Billet Cover Torque Converter Included – Matched for high-torque performance and improved heat control.
- Remanufactured Pump Assembly – Updated for durability and pressure stability.
- Remanufactured / Recalibrated Valve Body – Calibrated for cleaner, more consistent shifts.
- All New Internal Electronics – New internal components for reliable control.
- New Bushings
- New Filter
- All Industry Updates Installed
CLUTCHES, STEELS & INTERNAL CAPACITY
- 45RFE / 545RFE Performance Power Pack (Underdrive / Overdrive) – Increased capacity for higher torque handling.
- Twisted™ HD Steels – Strengthened wear characteristics, improved fatigue strength, and enhanced lubricity.
- High-Performance Friction Pack – Built for higher heat resistance and improved holding power.
PUMP & VALVE BODY – UPDATED THE TWISTED™ WAY
-
Pump – Modified & Updated the Twisted™ Way
- Updated circuits for improved pressure stability under load
- Corrected known OEM weaknesses
- Improved lubrication and converter charge control
-
Valve Body – Modified & Updated the Twisted™ Way
- Cleaner, firmer, more consistent shift timing
- Reduced cross-leaks and improved clutch apply control
- Calibrated for street, towing, and performance use
SHIFT CONTROL & PRESSURE UPGRADES
- Shift Kit (TransGo or Similar Quality) – Improves shift control and reliability under load.
- Updated Line Booster (Sonnax or Similar Quality) – Enhances line pressure stability for increased holding power.
- Updated Accumulator Piston & Sleeve (Sonnax or Similar Quality) – Helps address common slide shifts, 1–2 shudder, and coastdown clunk.
HYDRAULIC & ELECTRONIC COMPONENTS
- Updated Pressure Manifold
- New EPC Solenoid
- New Shift Solenoids
PERFORMANCE RATING
Rated for up to 550 HP (application dependent)
Built for high-output street performance, towing under load, and aggressive daily use.
For sustained racing or extreme abuse, a higher-tier build may be recommended.
APPLICATION FITMENT
- 2001–2011 Jeep Grand Cherokee (4.7L, 4.7L H.O., 5.7L Hemi, 6.4L Hemi)
- 2005–2006 Jeep Liberty (Diesel applications)
- 2003–2011 Dodge Ram (3.7L, 4.7L, 5.7L Hemi)
- 2005–2011 Dodge Power Wagon
- 2003–2011 Dodge Dakota (4.7L, 4.7L H.O.)
- 2003–2011 Dodge Durango (4.7L, 5.7L)
- 2006–2010 Jeep Commander (4.7L, 5.7L Hemi)
- 2007–2010 Jeep Wrangler (2.8L CRD)
- 2007–Present LTI/London Taxi Company TX4
- 2007–2009 Chrysler Aspen (4.7L, 5.7L Hemi)
Final fitment depends on vehicle configuration and intended use. Please confirm application details before ordering.
We custom build each transmission for the customer’s application using high-quality components.
Each unit is extensively updated for durability and performance and passes a series of inspections and tests prior to shipment.
Technical assistance available toll-free: 727-868-9462
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