I just had this TSB installed.
I had to show the Service Advisor where on the work order it was. She didn't have a clue. They at first said they couldn't do it "under warranty" for my truck. I pushed back.
I think the shifting is worse. I wouldn't call it harsh, but I also wouldn't call it firm. More "abrupt."
The 1-2 upshift seems to happen immediately off a start. It will be interesting to see what it does towing a load.
The 2-3 lockup seems more pronounced. That shift-lockup(shift) much more noticeable.
Haven't had a chance to evaluate a change in the cold idle roughness yet.
How is your trans shifting now? Does the Aisin trans go back into "learning mode" after a flash? I was told it takes quite a while for 68RFE.