68RFE Transmission Problems and Replacement in Edmonton

If you drive a 2007.5 or newer Ram 2500 or 3500 with the 6.7L Cummins, odds are the transmission behind it is a 68RFE. It's a six-speed automatic designed alongside the 6.7 Cummins, and for everyday driving and moderate towing it does the job. Ask it to pull heavy trailers day after day, run bigger tires or handle a tuned engine, and it becomes one of the most commonly replaced heavy-duty truck transmissions on the road.

Here's how to tell when yours is in trouble, why it fails, and what your options are.

Which trucks have the 68RFE?

• Ram 2500 and 3500 pickups with the 6.7L Cummins diesel, from the 2007.5 model year on.

• Not every 6.7 Cummins has one. Some Ram 3500s, including chassis cabs and high-output trucks, use an Aisin six-speed instead.

• Not sure which you have? We can confirm it from your VIN.

Warning signs of a failing 68RFE

• Slipping or flaring on the 4-5 or 5-6 shift, especially when towing.

• Limp mode: stuck in one gear with a check engine or wrench light on.

• Shudder at highway speed, or the torque converter not locking up.

• Harsh, late or erratic shifts, or a delay when you put it in drive or reverse.

• Dark or burnt-smelling fluid, or transmission temperature climbing while towing.

• Transmission codes such as P0700 or gear-ratio errors.

Catching these early matters. A slip that gets driven on for weeks can turn a repairable problem into a full replacement.

Why 68RFE transmissions fail

Overdrive clutches

The overdrive clutch pack is the most common failure point. The clutches are thin and don't shed heat well, so heavy towing, incorrect line pressure or extra power from a tune can burn them out.

Valve body, solenoids and pressure control

Wear in the valve body, including the solenoid switch valve bore, plus solenoid pack faults and pressure-control problems, cause erratic shifting and limp mode. Low or high line pressure also feeds back into overdrive clutch failure.

Heat

Heat breaks down fluid and clutches quickly. A sticking thermal bypass valve, a restricted cooler or old fluid lets the transmission run hotter than it should, and long pulls with a loaded trailer make it worse.

Added power and bigger tires

The 68RFE was built around the stock Cummins. Tunes and oversized tires add load it wasn't designed for, and the clutches and input shaft are usually the first to give up.

Repair, rebuild or replace?

Not every shifting problem means a new transmission. A failed sensor, a wiring fault, low fluid or a software issue can look a lot like internal failure, so we start with a diagnosis: codes, fluid level and condition, and a road test.

If the clutches are burnt, the damage is internal and the debris has usually travelled through the torque converter and cooler. At that point, a new or remanufactured transmission is often the faster and more dependable fix than patching the old one. The cooler and lines should also be flushed or replaced so old debris doesn't end up in the new unit.

If your truck tows heavy or runs a tune, tell us up front. It changes which replacement makes sense.

3-year, 100,000 km warranty on new and remanufactured transmissions

Every new or remanufactured transmission we install comes with a 3-year, 100,000 km warranty, so you're not gambling on a used unit from a wrecker.

How to make a 68RFE last

• Change the fluid and both filters on schedule, and sooner if you tow often.

• Use the fluid Ram specifies for your transmission.

• Use tow/haul mode and keep an eye on transmission temperature on long pulls.

• On cold Edmonton mornings, plug in and let the truck warm up before you hook up a heavy load.

• Don't ignore a flare or shudder. Early repairs cost far less.

Running a fleet of Rams?

Work trucks that sit in the yard cost money every day. Our fleet maintenance program offers business accounts, priority scheduling and monthly invoicing.

68RFE questions we hear

How long does a 68RFE last?

There's no single number. Trucks that mostly commute can go a long way, while trucks that tow heavy or run a tune often need work much sooner. Fluid service and keeping heat down make the biggest difference.

Can I keep driving in limp mode?

Only far enough to get the truck to a shop. Limp mode is the transmission protecting itself, and driving on it can turn a smaller repair into a replacement.

Can you give me a second opinion on a transmission quote?

Yes, free, on a quote from any shop or dealer.

Get it checked in south Edmonton

Big Toy Shop works on all makes and models, including heavy-duty diesel trucks. We diagnose first, explain what we found, and give you a straight answer on whether your 68RFE needs a repair or a replacement. Already have a quote from another shop or dealer? We'll give you a free second opinion.

Find us at 8315 Argyll Road NW. Book online, visit our auto repair page or call 780-298-2797.