2018 2500 with a 4-inch lift and 37's with RaceME Ultra and 68RFE.
After installing RaceME about eight months ago, I soon got the P0879 code, so I replaced the valve body with a Revmax.
Three months after that, I started getting P0933, and when the truck is cruising at 60mph with RPMs around 1200 in 6th gear and starts to go up a slight incline, it starts jumping and won't downshift unless I floor the pedal.
Fast forward to complete failure and rebuild three weeks ago.
The truck is doing the same thing after rebuilding 6th gear with low RPMs and shudders like a straight drive needing to downshift.
The transmission shop just called and said they put a line pressure booster on it, and it's ready to go.
I call BS because the RaceME supposedly increases pressure, and it still did it.
Could this be a tuning issue, or has anyone dealt with problems like this?
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