68RFE Sun Shell 2007

This page is listed as a 68RFE sun shell, but the part pictured and shipped is a remanufactured OEM 68RFE valve body for Ram 2500 and 3500 pickups with the 6.7L Cummins. It is the part most first-generation 68RFE owners end up shopping for once the truck starts banging into second, flaring on the 3-4 shift with a trailer behind it, or setting a pressure switch code that comes back every time it is cleared. Each body is cleaned, inspected and bench tested before it ships, and it is sold exactly as shown in the photo.

What the valve body does in a 68RFE

The 68RFE has no shift cables or governor. The transmission computer fires solenoids in the solenoid block, and the valve body turns those electrical commands into oil flow to each clutch. Its bores hold the solenoid switch valve, the manual valve and the accumulators that cushion each apply. When those bores wear, oil that should be holding a clutch leaks back to the pan. The clutch slips, slip makes heat, and on a diesel that tows the heat finishes the job. Sonnax calls overdrive clutch failure the most common 68RFE complaint and names the switch valve end plugs as the weak point in that circuit, which is why a fresh clutch pack on a leaking body often burns again.

Symptoms that point at the valve body

• Harsh or banging upshifts, or a hard downshift as the truck rolls to a stop
• Slip or flare on the 3-4 or 4-5 shift once the fluid is hot, worse when towing
• P0871 (overdrive pressure switch rationality) or P0868 (line pressure low) returning after a reset
• Limp mode, with the truck locked in one gear until it is restarted
• Converter clutch that will not hold or shudders, since early units route lockup through the same switch valve

How to confirm it before you buy

Pull codes and watch commanded versus actual line pressure on a scan tool. GEARS Magazine puts a healthy 68RFE at roughly 60 to 70 psi at idle, commanded and actual. Then rule out the solenoid block, because a weak pack can look exactly like a leaking body. Our 68RFE valve body testing guide walks through the pressure checks and the switch valve bore vacuum test, and the Ram 3500 Cummins shift problems guide separates valve body faults from solenoid and sensor faults.

Fitment

The catalog entry says 2007. The unit is described as a fit for 2007-up Ram 2500 and 3500 trucks with the 6.7L Cummins and 68RFE, but Chrysler changed this valve body more than once. Transmission Digest identifies the generations by solenoid connector color: white on the original 2007.5 to 2009 trucks, gray from 2010 when the overdrive solenoid was eliminated, and blue from 2019 when a separate TCC solenoid and a reverse solenoid were added. These bodies do not swap across generations. Before you order, compare the casting, check ball layout and connector on your old body against the photo, or send us your year and VIN and we will check it for you. If your truck is a 2010-2018 gray-connector unit, see the 2010-2018 68RFE valve body instead. The rest of the lineup is on the 68RFE parts page.

Install notes

• The photo shows a solenoid block mounted to the body. Test your original block anyway so you know which one is good, and always use a new gasket between them.
• If the overdrive clutch is already burned, a valve body alone will not fix the slip. Look at a clutch housing such as the 2007-2017 68RFE input drum while the unit is apart.
• Flush the cooler and lines so clutch debris does not come straight back into the new bores.
• Fill with ATF+4 and set the level with the fluid at 160 degrees F or hotter, as the FCA recall service instructions specify.
• Clear codes and run a quick learn with a capable scan tool before the road test.
• Keep fluid temperature in check when towing. A cooler bypass upgrade such as the ZeroStat cooler bypass kit helps the transmission run cooler under load.

Is this actually a sun shell?

No. The catalog name is wrong. The item is a remanufactured OEM 68RFE valve body for Ram 2500 and 3500 trucks with the 6.7L Cummins, sold as pictured.

Will this fit my 2008 Ram 2500 with the 6.7L?

Only if it matches your original body. 2007.5 to 2009 trucks use the white-connector design. Compare the casting, check ball layout and connector to your old body, or send us your VIN to confirm.

Will a new valve body fix my burned overdrive clutch?

No. It removes a common cause of the burn, which is oil leaking past worn switch valve bores. The burned clutches still need to be replaced.

What fluid does it need?

ATF+4 only. Check the level hot, at 160 degrees F or more, with the engine running in Park.

Do I need a scan tool after installing it?

Yes. Clear the stored codes and run the quick learn procedure so the computer relearns clutch fill times on the new body.

• 68RFE Valve Body Problems: Symptoms, How to Test, and Replacement
• 68RFE Ram 3500 Cummins Shift Problems: Diagnosis and Fix
• 68RFE Shift Solenoid Symptoms, Testing and Replacement
• 68RFE Ram 2500 Cummins Common Problems and Fixes