I forget, but does the TC lock up between 2nd and 3rd?

I had the same issue before my transmission was replaced by the dealer.

My tranny has the same issue. Been doing it for about 15k miles. I have changed fluid and both filters. Replaced the solenoid pack as well with no difference. I have also found that the quick learn will make it go away for a while.

My TPS is original. I have autoenginuity and can monitor my TPS and it reads fine.

The funny thing is that some days it shifts great and other days it shifts hard as hell.

I am just waiting for something to really break, so I can figure out what is causing this. It drives me crazy. If you find a solution, please post it.

I also replaced front and rear diff fluid. Didn't make it any better.

I have a similar issue, at about 20 mph, if I slightly accelerate, especially down hill, it shifts to 3rd with a slight noise, like something is loose somewhere. I had replaced both u joints from the rear shaft and the noise and harsh feel went away I'd say about 80%. Both before and after u joints replacement, accelerating normal, let's say quarter pedal press, the harsh shift and noise was not existent. My transfer case u joint had some play, but the rear was as good as new. Does those symptoms sound similar with what you guys experience?

Btw, the rear Diff oil had always been Lucas non synthetic 85w140, mounts are almost new, tranny and transfer case fluids are about 25k old, but the symptoms had been always the same.

The symptoms are different than driveline clunk. It is more like a bind during the 2 to 3 upshift which feels like a quick, but firm tap of the brake pedal. It is abrupt and jarring, and quite annoying, hence my persistence in attempting to solve it.

They are called Pedal Position 1 and Pedal Position 2 on the drop down in the Enhanced Powertrain Menu. I bought this vehicle used, and found out from Jeep that the torque converter was replaced about 60K miles ago under a recall. I assume the pump is original. The line pressures seem to run at 120psig and then taper off to 50 psig under normal cruising. It did notice what seemed to be pressure intermittent pressure spikes (from 50psig to 120psig) for no apparent reason when cruising at about 30 mph. I will continue to investigate this.

I never looked in enhanced powertrain. The one I used is called Throttle Position in the Transmission Control Module. It reads in degrees and goes from 0-90.

I will log some data of throttle position and trans fluid pressure and see if we have any similarities.

Does yours shift hard from 2-3 all the time? Mine seems to do it about 80% of the time. There are a few days where it shifts great and most days it is harsh.

Also here are my CVI values:
Underdrive - 42
Overdrive - 57
LR - 68
2-4 - 44



I am curious if yours are similar since the quick learn which resets these can eliminate our symptoms for a bit.

Can you quick learn with your AE? I have version 9.1 which has the test, but it fails whenever I try to run it. I've taken my CRD to a tranny shop twice and their snapon scanner can do it for $40 a pop. That got old real fast.