Transmission

[Mikeroo]

So I have been experiencing some rough shifting and knowing the transmissions are a little problematic I took it into the dealer (it did not hurt they are handing out some pretty good loaners)

Anyway they said they are going to change out the transmission wiring harness.. I asked them what was physically wrong since I am assuming it is just a wiring harness. Are the cables charred, worn is some fashion? Anyway I have not received an answer.

Guess the question is, is the transmission wiring harness more then just a bundle of wires? Is there something else that could go wrong??