Last updated: June 2026 By Alex Smith, ShopEarl

A failing 68RFE usually shows up as harsh or slipping shifts, converter shudder, or a sudden drop into limp mode, and it leaves you with one decision: rebuild, replace with a remanufactured unit, or drop in a tested used transmission. In 2026, a used 68RFE assembly runs about $800–$2,500 plus labor, a reman unit $6,000–$8,500, and a rebuild $4,500–$6,500. Whichever you choose, the part only works if you match the exact truck and confirm the warranty.

The 68RFE is the six-speed automatic behind the 6.7L Cummins in Ram 2500 and 3500 diesel pickups. It is a strong transmission, but heat from towing and tuning wears its overdrive clutches, torque converter, and valve body — so when it goes, knowing what fits and what each replacement path really costs saves you from buying the wrong unit twice. This is the code-specific companion to our broader transmission replacement cost guide.

What is the 68RFE — and what has to match before you buy

The 68RFE arrived midway through the 2007 model year alongside the 6.7L Cummins, replacing the four-speed 48RE. It is a six-speed electronically controlled automatic, it uses ATF+4 fluid, and it lives in Ram 2500 and 3500 pickups from 2007.5 through 2024. (Ram 4500/5500 cab-chassis and some heavier 3500s use the Aisin AS69RC instead — a different transmission entirely, so confirm the code before you buy.) Full ratios and history are on the DieselHub 68RFE spec page.

Before you buy a replacement, match the unit to your truck: year, make, model, the 6.7L Cummins engine, and 2WD vs. 4WD. One detail trips up a lot of buyers — a used transmission assembly is the gear-changing unit only. It does not include the torque converter, flexplate, transmission mount, shift linkage, or cooler lines. On a 68RFE the torque converter is a known wear item, so decide up front whether you are reusing yours or buying a new one. You can see the live fitment filters on the used transmission category page.

Bad 68RFE transmission symptoms

Most 68RFE failures announce themselves before they strand you. Watch for these:

1. Harsh, delayed, or unpredictable shifts — especially a hard 1–2 or 2–3 shift, or a long pause before the truck engages when you drop it into drive.
2. Slipping under load — the engine revs but the truck does not pull, most noticeable when towing or climbing.
3. Torque converter shudder — a vibration or shudder around 40–50 mph as the converter tries to lock up.
4. Rising transmission temperatures while towing — the overdrive clutches shed heat poorly, and high temps cook the fluid.
5. Burnt-smelling or dark fluid — healthy ATF+4 is red; dark, burnt fluid means clutch material is breaking down.
6. Limp mode — the truck locks into a single gear (often third) with the check-engine light on, to protect itself from further damage.

The overdrive clutches are the most common failure point — their thin profile dissipates heat poorly and warps under towing or tuning — followed by the torque converter and the valve body. Diesel Power Products has a good teardown of the 68RFE’s weak points if you want the mechanical detail.

The trouble codes and limp mode that mean “replace it”

A 68RFE drops into limp mode when the computer detects a severe slip or the wrong gear ratio. It sets a diagnostic trouble code and locks the transmission in one gear so you can limp home. The catch-all is P0700 (transmission control system malfunction), which tells you the TCM has logged a fault and points you to the specific codes stored alongside it — pressure, solenoid, ratio, or torque-converter codes.

One limp-mode event from a single overheating tow may clear and never return. But repeated limp mode, a slip that comes back after a fluid-and-filter service, or metal in the pan means the internals are worn — that is the point where a fluid change will not save it and you are choosing between rebuild, reman, and used.

How to confirm it’s the transmission

Before you spend on a transmission, rule out the cheap stuff. Scan the codes (P0700 plus its companions), check the fluid level and condition, and inspect the connector and harness at the transmission. A worn valve body or a failing sensor can mimic a dying transmission, and so can low or burnt fluid. If a fresh fluid-and-filter service and a good scan still leave you with slipping, shudder, or repeat limp mode, the unit itself is worn and it is time to price replacements.

68RFE replacement cost: new vs. reman vs. used vs. built

Here is what each path costs in 2026 (parts only — add labor, typically 8–12 hours of work, about one to two days in the shop):

Costs change by region, shop, and core; confirm a current quote. The torque converter is often priced separately on a 68RFE — ask whether it is included.

The spread is wide because these are very different products. A used assembly is the cheapest way back on the road if you can verify the donor. A rebuild keeps your own case and fixes the known weak points. A remanufactured unit buys you the longest warranty. A built transmission upgrades the clutches and converter for heavy towing or added power.

Rebuild, replace, or buy used?

If your budget is tight and you can confirm a low-mileage donor, a tested used 68RFE is the fastest, cheapest fix — just confirm fitment and the return window. If you want the longest peace of mind, a remanufactured unit with a multi-year, transferable warranty is the safe pick. If you tow at the truck’s limits or run a tuner, pay once for a built unit so you are not back here in a year. A plain rebuild makes sense when your core is good and you trust the shop. For the full new-vs-used-vs-reman framework across all transmissions, see our transmission replacement cost guide.

Where to buy a 68RFE: used vs. remanufactured

There is no single best seller — it depends on whether you want lowest cost (used) or longest warranty (reman). Here is an honest read, organized by use-case rather than a forced ranking. The criteria: price, warranty, fitment support, shipping, and how confident you can be the part is actually in stock.

Terms change — confirm warranty and shipping with each seller before you buy.

Best for used: ShopEarl. ShopEarl is a curated marketplace of 150+ vetted US salvage yards across 47 states. The homework happens twice before a listing exists — the yard is vetted before it can sell, and an AI system screens problem used inventory out before it is ever listed. You see live, real-time inventory and pricing (so the unit you click is actually there), every used 68RFE listing shows the donor’s mileage, and orders ship free with a 30-day-minimum warranty and optional extended coverage. Keep in mind: the base warranty is shorter than a reman specialist’s multi-year coverage, so if warranty length is your priority, weigh a reman unit.

Best for the widest used selection: eBay Motors. An open marketplace where anyone can list, so condition and quality vary seller to seller — its Guaranteed Fit program helps you confirm the unit matches your truck. Best when you will vet the individual seller’s feedback yourself.

Best for rare fitment hunting: car-part.com. The widest pool of raw salvage-yard listings, but there is no checkout (you call each yard one at a time), the inventory feed refreshes about once a day so listings are often already sold, and the price excludes shipping.

Best for the longest warranty: JASPER. A national remanufacturer whose 68RFE carries a 3-year/100,000-mile nationwide, transferable parts-and-labor warranty — the safe pick if you want the longest coverage from one source.

Best for towing and power: diesel specialists such as ATS Diesel, Sun Coast, BD Diesel, and Randy’s Transmissions, which build upgraded 68RFE units with stronger clutches and converters for heavy towing or added horsepower.

ShopEarl also carries remanufactured and new aftermarket transmissions, so you can compare a used unit against a reman one in the same place. For a broader walk-through, see where to buy a used transmission.

How to buy a used 68RFE without getting burned

1. Match the exact unit. Confirm year, make, model, the 6.7L Cummins engine, 2WD vs. 4WD, and that the code is 68RFE (not the Aisin AS69RC).
2. Get the donor’s mileage and condition. Lower-mileage donors last longer; ask how the transmission was tested before listing.
3. Read the warranty — parts vs. parts-and-labor. A 30-day return window protects you; longer coverage is worth paying for on a diesel unit.
4. Settle the torque converter. Decide whether you are reusing yours or buying new — the assembly does not include it.
5. Buy from a live-inventory source. A real-time listing means the unit is actually in stock at that price, not a stale feed entry that sold last week.

Frequently asked questions

How much does it cost to replace a 68RFE transmission? In 2026, a used 68RFE assembly runs about $800–$2,500 plus labor, a rebuild $4,500–$6,500, and a remanufactured unit $6,000–$8,500. Labor is typically 8–12 hours. Built performance units start around $5,400 and can exceed $10,900. The torque converter is often priced separately, so confirm whether it is included.

What are the most common 68RFE problems? The overdrive clutches are the most common failure point because they shed heat poorly and warp under towing or tuning. The torque converter (shudder and lockup failure) and the valve body (cross-leaks that cause sloppy shifts) are the next two. Symptoms include harsh or slipping shifts, converter shudder around 40–50 mph, overheating while towing, and limp mode.

What does limp mode on a 68RFE mean? Limp mode locks the transmission in a single gear (often third) with the check-engine light on, after the computer detects a severe slip or wrong gear ratio. It usually sets code P0700 plus a specific companion code. A one-time event from overheating may clear, but repeated limp mode points to worn internals.

Is it safe to buy a used 68RFE transmission? Yes, if you match the exact unit, get the donor’s mileage, and buy from a source with a return window and live inventory. Used is the lowest-cost path back on the road. On ShopEarl, every used listing shows the donor’s mileage and ships with a 30-day-minimum warranty; if you want multi-year coverage instead, choose a remanufactured unit.

Which Ram trucks use the 68RFE? The 68RFE is in Ram 2500 and 3500 pickups with the 6.7L Cummins diesel, from the 2007.5 model year through 2024. Heavier Ram 4500/5500 cab-chassis trucks and some 3500s use the Aisin AS69RC instead, so always confirm the transmission code before buying.

Sources: DieselHub — 68RFE specs; Diesel Power Products — 68RFE problems & upgrades; JASPER Engines & Transmissions — Chrysler 68RFE; seller warranty and pricing pages cited inline. Confirm current pricing and warranty terms with each seller.

Alex Smith runs ShopEarl, a US marketplace for used, remanufactured, and new aftermarket auto parts sourced from vetted salvage yards.