Transgo shift kit for 2019-up Mopar 68RFE units: accumulator pistons, springs, valve and plate aimed at stopping underdrive clutch burnout.
Rebuilders started seeing a pattern on 2019 and newer Ram 2500 and 3500 trucks with the 6.7L Cummins: the underdrive clutch burns up slowly, often on a truck that has been tuned, with no obvious cause on the bench. TransGo's SK 68RFE-19UP is the valve body repair kit they engineered for exactly that failure on the late 68RFE, and it carries over the pump and unit fixes from their 45RFE kit so a fresh rebuild does not come back.
In 2019 Chrysler changed the 68RFE: the solenoid pack moved to a blue connector and the low/reverse solenoid stopped controlling the converter clutch, with the reverse clutch given its own control solenoid. TransGo found that on these units, extra line pressure, especially from aftermarket tuning, can make the underdrive clutch apply for a moment while the truck is already in Overdrive. Each of those brief applies adds heat to a clutch that should be released, and over thousands of miles the pack burns. The heart of this kit is a patented underdrive accumulator system: a dual-sealing billet piston with a calibrated, progressive spring stack that soaks up those pressure pulses. TransGo states it works with stock calibrations and with tuned trucks.
The kit also includes a new L/R switch valve and end plug, a heavy duty accumulator plate, and a lock-up solenoid pulse damper, plus two optional internal upgrades that need the transmission out of the truck: a heavy duty underdrive snap ring and a torque converter and cooler pressure limit system.
If the truck is still driving, scan it before you open anything. FCA released powertrain control module flashes for 2019 Ram heavy duty Cummins trucks addressing upshift quality, shift schedule and a downshift clunk with the exhaust brake, so a shift complaint may have a software answer. Our 68RFE Ram 3500 Cummins shift problems guide covers those updates and how to read slip in each gear. Burnt fluid or friction material in the pan means the underdrive clutch has to be rebuilt; this kit protects the new clutches, it cannot repair burned ones. The 68RFE Ram 2500 Cummins problems article lists the other common failures to rule out.
TransGo lists this kit for the 68RFE from 2019 on. That is the 68RFE behind the standard-output 6.7L Cummins in the Ram 2500 and 3500; high-output 3500s use the Aisin AS69RC, which this kit does not fit. Look at the case connector before ordering: blue means the 2019-up design. A white or gray connector means a 2007-2018 unit that needs a different kit such as the TransGo RFE-7B-HP for 7-ball valve bodies. If you want more line pressure capacity on top of the underdrive fix, compare TransGo's RFE-HP-19UP Tuneless kit. Send us your year and VIN if you want the match checked, and see everything for this transmission on the 68RFE parts page.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. TransGo lists the SK 68RFE-19UP for 2019-on 68RFE units only. 2007-2018 trucks have a different valve body and solenoid pack and need an earlier kit.
Yes. TransGo states the underdrive accumulator system works with stock calibrations and with tuned trucks, and elevated line pressure from tuning is the condition it was designed around.
The valve body and accumulator parts install from under the pan. The heavy duty underdrive snap ring and the converter and cooler pressure limit system are internal upgrades that need the transmission removed.
No. The clutches have to be replaced. Install this kit during that rebuild so the new underdrive pack is not damaged the same way.
No. The high-output 6.7L in the 3500 uses the Aisin AS69RC transmission, not the 68RFE.
