Quote Originally Posted by Nak View Post
Before you shorten the rod, check and see if it is clear of the front driveshaft. If the 4L80 shifting shaft is at all lower than what you had you may get interference between the shift rod and the driveshaft. At least on mine, "Park" is where it's closest to the driveshaft. If that's the case you may need to make bigger modifications to the rod than just shortening it. Might as well do it all at once if you need to... Mine actually taps the driveshaft when I go into park. If the 6L80 shifting shaft was at all lower--even an 1/8"-- I'd have to mod the rod.
No worries about a front shaft, its going into a 2wd C1500.