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The 68RFE is the six-speed automatic behind the 6.7L Cummins in the 2007.5+ Ram 2500 and 3500. It is a stout transmission for a stock truck, but the Cummins makes serious torque, and the 68RFE was designed with a thin margin behind it. The result is a transmission that lives a long, happy life behind a bone-stock truck that never tows, and a transmission that burns up overdrive clutches behind a tuned truck pulling a fifth wheel. Almost everything we see is torque-related, not random.
The two parts that define the 68RFE story are the torque converter and the overdrive/4th-5th clutch pack. If you tow heavy or run a tuner, those are the parts that decide how long your trans lasts. Building it correctly the first time is far cheaper than building it twice.
Problems By Year and Use
| Years / Use | Common Failure | Typical Cause |
|---|---|---|
| 2007.5-2012 (towing) | Overdrive clutch burn-up, slip in 6th | Marginal OD clutch capacity |
| 2013-2018 (stock) | TCC shudder, P0700/P0868 | Converter clutch, line pressure |
| Any year (tuned) | Converter failure, limp mode | Torque exceeding stock holding |
| 2019+ | Harsh shifts, solenoid codes | Solenoid pack, valve body wear |
The Failures You Will Actually See
1. Overdrive Clutch Burn-Up — The Tow Truck Killer
The 4th-5th-6th clutch pack in the 68RFE is the weak link behind a loaded Cummins. Tow heavy in overdrive and you glaze and then burn these frictions. Symptom is a slip or flare in the upper gears under load. When you rebuild, this is where you spend on better frictions and an extra clutch where the design allows, because a stock-spec rebuild behind a tow truck will fail the same way.
Check 68RFE rebuild kits
2. Torque Converter Failure
The stock 68RFE converter is the first thing to give up behind a tuner or heavy trailer. A billet or upgraded converter is not optional on a worked truck, it is the foundation. Symptom of a failing converter is shudder, slip, and eventually metal in the fluid. Replace the converter and flush the cooler whenever you rebuild.
Browse 68RFE billet converters
3. Solenoid Pack and Valve Body
Harsh shifts, limp mode, and codes like P0700 or P0868 (low line pressure) often trace to the solenoid pack or a worn valve body. These are serviceable without a full rebuild. A line pressure problem starved of the right governor pressure will mimic clutch slip, so verify before condemning the internals.
Check 68RFE solenoid packs
What It Costs
| Repair | DIY Parts | Shop Price |
|---|---|---|
| Solenoid pack + fluid | $300-$500 | $800-$1,200 |
| Billet converter | $700-$1,400 | $2,000-$3,000 installed |
| Stock rebuild kit | $1,400-$2,200 | $3,500-$5,000 |
| Built/tow rebuild + converter | $2,800-$4,500 | $5,500-$8,500 |
Rebuild vs Replace
For a stock truck with an electronic or hydraulic complaint, fix the part. For a truck that tows or is tuned and has burnt overdrive clutches, do not rebuild to stock spec, because you will be back. Build it for the duty: upgraded frictions, the right number of clutches, a proper converter, and a valve body addressing known wear. That is the difference between a 68RFE that fails at 90,000 towing miles and one that runs past 250,000.
A reman is rarely the right call here because reman units are built to stock spec and stock spec is what failed your truck. Build the original case correctly with parts matched to how you drive.
68RFE Built-Tough Parts, Ships Same-Day
Master kits, billet converters, upgraded clutch packs, solenoid packs, and ATF+4. gearboxinsider.com stocks 68RFE parts at shop-direct pricing. Same-day ship before 2pm Eastern.
Shop Gearbox Insider →FAQ
Can the 68RFE handle a tuner?
The stock unit, not reliably under load. A tuner plus a trailer will burn overdrive clutches and the converter. Build the trans before or alongside the tune.
What fluid does the 68RFE take?
ATF+4 only. Towing trucks benefit from frequent changes; this is not a fill-for-life unit if you work it.
Is the 68RFE better than the older 48RE?
Different tradeoffs. The 68RFE is a smoother six-speed; the 48RE is a simpler, very stout four-speed. Both can be built to take serious power.