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Call or Text (352) 722-5295Transmission on the 2019-2024 RAM 6.7L Cummins
Every Ram 2500 and every standard-output 3500 with the 6.7L Cummins left the factory with the Chrysler 68RFE six-speed automatic behind the 370 hp, 850 lb-ft rating. For 2019, Ram gave it variable-force solenoid control of the converter clutch and a new reverse accumulator. Ram 3500 pickups ordered with the high-output engine got the Aisin AS69RC six-speed instead, with stronger planetary gears, a larger thrust bearing and a new dual-core controller with double the memory. Both lock the converter in 2nd through 6th gear and both have tow/haul. There is no manual transmission in this generation; the G56 ended with 2018. If you have a 2023-or-later Rebel 2500 with the optional Cummins, it is a 68RFE truck.
The two gearboxes are serviced differently. The 68RFE takes ATF+4, uses two filters (a sump filter, Mopar 5013470AE, and an external spin-on, 5015267AD) and is rated for fluid service at 120,000 miles under normal use or 60,000 under severe use. The Aisin takes Mopar ASRC fluid (5189977AB) on a 30,000-mile or 24-month interval and uses sump filter 68224232AA. Its solenoids are not sold separately; they come with the valve body.
What fails and why
On the 68RFE, the commonly cited weak spot is the valve-body accumulator plate. When it warps or blows out, fluid cross-leaks and you get a P0871 code, harsh shifts and limp mode. A worn converter clutch adds a shudder around 40-50 mph and spreads debris through the unit. Two recalls, 20V-043 and 22V-835, covered heat and pressure pushing ATF out of the dipstick tube onto hot parts on 2019-2023 trucks, a fire risk. Recall 24V-413 covered 2023 trucks with a transmission control unit weld that could let fluid reach electrical parts. Owners have also reported 68RFE units that would not engage reverse when hot, and repeat replacements, though those reports are anecdotal.
On the Aisin, the one to know is the K1 clutch snap ring. When it dislodges you lose 1st through 4th gear and set P0731, while 5th and reverse still work. TSB 21-002-23 covers 2019-2023 3500 pickups and cab chassis built on or before December 1, 2022, with extra conditions on 2019-2021 trucks, so have a dealer run your VIN. Early 2019 Aisin trucks also had harsh shifting that dealer reflashes mostly fixed. BD Diesel attributes most Aisin failures to converter-clutch slip combined with heat.
Stock replacement vs. upgrade
If the truck is a daily driver that tows light, factory-spec service is the right call: the correct filter, the correct fluid and a fresh pan gasket on schedule. If it tows heavy or works for a living, fix the known weak points before they take the whole unit with them. On the 68RFE that means an upgraded accumulator plate or complete valve body to stop P0871 cross-leaks, and a billet converter to end lockup shudder before it contaminates the transmission. A deeper pan adds fluid volume and cooling. At the far end, a built 68RFE adds overdrive clutch capacity and a heavy-duty valve body for hotshot and heavy-tow work. On the Aisin, the usual moves are a higher-capacity converter, more cooler flow and shorter fluid intervals.
What we carry
BD Diesel and ATS Diesel Performance carry the deepest lineups here. BD covers complete 68RFE builds in Roadmaster, Towmaster and Torquemaster form, a Stage 3 build-it kit with PROTECT68, billet input shafts, overdrive shaft kits, Xtruded coolers, a filter service kit and a thermal bypass valve upgrade. ATS offers 68RFE and AS69RC transmission packages, full Allison conversion kits, billet channel plates, accumulator parts and separator plate gaskets. Mishimoto supplies a direct-fit 2019-2024 cooler, standard and full-flow thermal bypass valves, a cast aluminum 68RFE pan and universal coolers. PPE brings cast aluminum pans for both the 68RFE and AS69RC, pan gaskets, filters and a bar-and-plate cooler. Hot Shot's Secret and Lucas Oil cover fluid. You will also find a Mag-Hytec pan, the XDP XD452 extra-deep pan, a MAHLE 68RFE pan gasket, an Anchor transmission mount and parts from AFE.
Fitment notes
- Identify the gearbox before you order. The Aisin AS69RC carries sales code DF2; the high-output engine is ETM and the standard-output engine is ETL. Check the build sheet or a VIN decode.
- The 68RFE, the AS69RC and the gas-engine 66RFE do not interchange. 4x4 units have a short output shaft and a transfer-case flange; 2WD units have a long tailshaft.
- A 2013-2018 AS69RC is not electronically compatible with a 2019-2020 truck.
- Many 68RFE parts here are listed for 2007.5-2024, and some aftermarket filters are designed around a specific deep pan. Read the listing.
- After a failure, do not reuse the old converter, and flush or replace the cooler and lines.
Frequently asked questions
Does my 2019-2024 Ram 2500 have the 68RFE or the Aisin?
Every 2500 with the 6.7L Cummins uses the 68RFE. The Aisin AS69RC came only behind the high-output engine in 3500 pickups, plus the chassis cabs. Look for sales code DF2 on your build sheet; if it is there, you have the Aisin.
What causes a P0871 code on the 68RFE?
On these trucks it usually traces to the valve-body accumulator plate warping or blowing out, which lets fluid cross-leak. Harsh shifts and limp mode often come with it. An upgraded accumulator plate or a complete upgraded valve body is the fix aimed at that failure.
My high-output 3500 lost 1st through 4th gear. What happened?
That pattern, with 5th and reverse still working and a P0731 code, matches the K1 clutch snap ring coming loose. TSB 21-002-23 covers many 2019-2023 3500s built on or before December 1, 2022. Have a dealer check your VIN before you buy parts.
Can I put ATF+4 in the Aisin AS69RC?
No. The Aisin needs ASRC fluid, Mopar 5189977AB, built to the JWS3309 spec. ATF+4 is the 68RFE fluid. The intervals differ too: 30,000 miles or 24 months on the Aisin, versus 120,000 normal or 60,000 severe on the 68RFE.
Should I replace the converter when I replace the transmission?
If the old unit failed, yes. The old converter should not go back in, and the cooler and lines need a flush or replacement so debris does not feed straight into the new transmission. Several BD Diesel packages here include a converter.
Not sure what fits? Call the shop at the number in the header, or use the fitment checker on any product page. We install everything we sell.