What do you mean by a firm 2-1 downshift? When shifting manually?My rebuilt transmission went in late last week (ATS diesel with upgraded valve body and their torque converter). The torque converter shudder that I felt on the old trans is not present here at all. The jeep feels so smooth to drive at hwy speeds now and the difference is very perceptible. It is amazing how much we take for "normal" on our used vehicles as we get used to them. I was quite frustrated this summer with the shudder on long trips and I could feel it slowly getting worse. Even my non-jeeper/non-car-enthusiast friends that traveled with me could feel and hear it. I am so glad that this is resolved now.
With the rebuilt trans, the upshifts feel really smooth and normal but downshifts feel quite firm (esp the 2-1 downshift) esp after you first start the vehicle and start driving. It does get better after the vehicle has been driven for a while. The shop that did the install is very well versed with properly checking the fluid levels on Chrysler transmissions and such so I have full confidence that the install was done correctly. I had a chat with ATS diesel tech support and I am told this will get better after a couple hundred miles (adaptives were reset post install). Will update here as to what happens.
@NashvilleTJ @Grover728 did you guys experience anything similar with your rebuilt transmissions?
@Chris for your records since you had asked me to let you know how this turns out
I can chirp 1->2 sometimes when playing around but 2->1 has been smooth. I wish I had replaced the torque converter long ago.
Did you get their valve body or kept the stock one?Never had that issue as I recall.
I wouldn't worry but if they did the transgo kit it's just a side effect of the system pressure change (I think a new spring) and the accumulator bleed change (one of the holes they drill). People that want high performance want short shifts and that's part of what those two things do.
Did you get their valve body or kept the stock one?
It's been quite a while, and I don't recall specifically what was done. But all the performance mods they were doing at the time were done to mine as it was their complete performance build. Quite a bit more was done to my current 545RFE.