My transmission is back acting like it did before the tsb was performed. It stumbles and shakes when I first take off in the morning. I also have a new code. P0004 which is "fuel volumn regulator control" Is that from having my fuel heater unplugged at the filter? Thanks for any help you can give.

Sorry I do not remember what was going on before.
Not that I know much now.
But how can this roving band of experts and wanna bee's(like me) do a diagnosis without more info?
Mileage, previous events, current events like how long since new oil and filters, do you do whole shots, bleach burns or just rolling starts.
Any related issues like a salt water bath, towing, teenagers, burnt fluid?

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'06 Jeep Liberty Sport CRD with: GDE Hot Flash and Tranny Flash, ehm, Cummins fuel pump, 3" Magnaflow muff, Moog K3199's, Skids, 225-75-16 10 ply, OME springs, Euro T/C, Shift kit, Trans cooler w/thermal bypass, Bigboy bkt, Samco CAC, Brake controller, Trans temp gauge, Al's Upper Arms

Fair questions.

45k total miles, fluid looks great and proper level. What I mean by actiong like before is it is acting like it did before the transmission recall/TSB where the fluid and filters were changed. If I remember correctly it came from the factory with the wrong filter in the transmission. The dealer performed the the TSB and changed two filters and the fluid. It is again actiong just as it did prior.

This vehicle does primarily highway miles and has never been off road.

If there was any warranty left I would be going there.
There is a section on codes but is there air in the fuel filter? I did the lift pump.
We also did the Suncoast T/C and Transgo shift kit preemptively. Imagine a plastic t/c!!!

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'06 Jeep Liberty Sport CRD with: GDE Hot Flash and Tranny Flash, ehm, Cummins fuel pump, 3" Magnaflow muff, Moog K3199's, Skids, 225-75-16 10 ply, OME springs, Euro T/C, Shift kit, Trans cooler w/thermal bypass, Bigboy bkt, Samco CAC, Brake controller, Trans temp gauge, Al's Upper Arms