Originally Posted by Hammahamma
... However, when the transmission went bad, I also lost indicators on my dash, i.e., when I shift into reverse The "R" is not lighting up on the dash and same goes with "D" for drive. It did prior to the truck's transmission issues. Both issues reared it's ugly head at the same time. ...
So what do you see on your dash? I think on yours the PRND letters are normally white, but the current gear position displays as green (or red for Reverse). So P and N are OK? Do you have a P0706 fault code?
If no P0706 fault, then I suspect the problem is in the instrument cluster and not the trans. If the trans itself is sending a "bad" (invalid) PRND position code, the dash display should light up ALL the positions (which, because of how the display is set up, looks like Reverse, because P, N, and D are all green but R is red).