Chrysler 48RE Transmission Repair & Rebuilding
The 48RE is the final evolution of Chrysler's TorqueFlite-derived heavy-duty four-speed, used behind the 5.9L Cummins in Dodge Ram 2500 and 3500 trucks. It is a simple, serviceable design that remains popular with diesel owners. We rebuild and repair 48RE transmissions for Phoenix-area Cummins trucks.
Common applications
- Dodge Ram 2500 and 3500 with the 5.9L Cummins
- Heavy tow and commercial use
- Gas heavy-duty applications in some configurations
Common problems and symptoms
The overdrive unit and converter clutch are common wear points, particularly on trucks that tow.
Governor pressure solenoid and sensor faults are a classic cause on this family.
The 48RE uses bands that require correct adjustment. Improper adjustment produces shift-quality complaints.
Pan, seal and cooler line leaks reduce pressure and should be corrected before they cause damage.
How we diagnose it
- Road test documenting shift points and lockup behavior
- Governor pressure solenoid and sensor testing
- Line pressure testing
- Fluid and pan debris inspection
- Cooling circuit inspection on tow-equipped trucks
Repair and rebuild options
- Governor solenoid and sensor replacement
- Band adjustment and valve body service
- Complete rebuild with new clutches, bands, bushings and seals
- Torque converter replacement and cooler flush
- Hard-part inspection appropriate to towing duty
Vehicles that use this transmission
Verified applications with their own repair pages. Where engine or trim changes the transmission, we confirm by VIN before quoting any work.
Frequently asked questions
Is the 48RE worth rebuilding on an older Cummins truck?
Often yes. These trucks frequently outlive their transmissions, and a properly rebuilt 48RE matched to how the truck is used is a common repair for us.
What is the governor pressure solenoid problem?
A failing governor pressure solenoid or sensor causes erratic shift points and is a well-known fault pattern on this family. It is diagnosed electrically before teardown.