Hey Guys,
As I understand it, there is an ECM which is responsible for engine management, a TCM which is responsible for transmission management, and a PCM is basically the ECM and the TCM together. If I'm not mistaken, on our cars the PCM is literally one phycical unit that houses the TCM and the ECM. Is that correct?
Here's my problem (the VERY short version). My car is having major shifting problems where between 3rd and 4th gear the car starts jerking and bucking pretty hard. I had the tranny rebuilt back in February with a warranty so of course I took it back to the shop. The shop owner said the TC lock-up is occuring too early and as a result the engine bogs when lock-up occurs. The bog is then recognized and the lock-up is released. This cycles very quickly and causes the jerking/bucking sensation. He said he's extremely confident that a program reflash with the latest programming will fix the problem because it will make the computer delay the lock-up speed to where it should be.
Right now I have a DHP 1.0 tune and my question is: Can I have a dealership reflash JUST the TCM and leave my ECM tune alone?
Thanks for the help!
