Product Description
The 68RFE transmission represents Chrysler’s evolution of heavy-duty transmission technology, featuring gear ratios of 3.23:1 (1st), 2.23:1 (2nd), 1.51:1 (3rd), 1.14:1 (4th), 0.87:1 (5th), and 0.69:1 (6th overdrive) for optimal torque multiplication and fuel economy. Compatible with 2007.5-2018 Ram 2500/3500 models equipped with 6.7L Cummins diesel engines, the 68RFE features electronic pressure control, temperature monitoring, and lock-up torque converter across multiple gears.
Builders assembling complete diesel powertrains should explore our selection of used engines including Cummins 5.9L and 6.7L turbodiesel options designed for 68RFE bolt patterns. Discover more about Chrysler automatic transmissions. Every 68RFE transmission undergoes pressure testing, solenoid pack inspection, valve body evaluation, and includes comprehensive warranty coverage ensuring reliable operation for demanding towing applications and heavy payload scenarios requiring bulletproof durability.
Frequently Asked Questions
What vehicles is the 68RFE transmission compatible with for swaps?
The 68RFE transmission fits 2007.5-2018 Ram 2500/3500 trucks equipped with 6.7L Cummins diesel engines. Swaps into earlier Dodge trucks require custom adapter housings, standalone TCM (transmission control module), and driveshaft modifications. The 68RFE works exclusively with diesel applications, not compatible with gasoline V8 engines without extensive modifications.
How much horsepower can a stock 68RFE transmission handle?
Stock 68RFE transmissions handle approximately 650 lb-ft of torque or 350-400 HP reliably in factory configuration. With upgraded clutch packs, billet input shaft, triple-disc torque converter, and performance valve body modifications, the 68RFE safely supports 700-900 HP. Fully built units with hardened components handle 1,000+ HP in diesel performance applications.
Is the 68RFE transmission reliable for heavy towing and hauling?
Yes, the 68RFE transmission demonstrates solid reliability for towing when properly maintained with fluid and filter changes every 30,000-50,000 miles using ATF+4 Mopar fluid. Common wear items include valve body solenoids and torque converter lockup clutches after 100,000+ miles. Upgraded transmissions with aftermarket parts significantly improve longevity under extreme loads and modified diesel engines.
What are common problems with used 68RFE transmissions?
Common transmission issues include harsh shifting caused by worn valve body, torque converter shudder from clutch material breakdown, and overdrive gear failure under heavy loads. Early 2007.5-2012 units experience more problems than later 2013-2018 models with improved internals. Regular maintenance and aftermarket transmission coolers prevent most failures. Browse quality tested diesel transmissions for reliable replacements.
Can I upgrade a 68RFE transmission for performance diesel builds?
Absolutely. The transmission responds well to upgrades including billet triple-disc torque converters, upgraded clutch packs rated for 1,000 HP, performance valve bodies with firmer shifts, and deep transmission pans with additional fluid capacity. Pairing with tuned 6.7L Cummins engines requires coordinated transmission tuning through TCM calibration for optimal shift points and durability.
68RFE Transmission – Dodge Heavy-Duty 6-Speed Automatic
