just wondering if anyone has a 98 g.c. 5.2 and has put a 1991 242 case in place of the 1998 249, and what all was nececeray to do so. when i do the swap i will only have one day to do this so i just want to be prepared thank you!!!
Input length is all that matters for mating to the tranny. Gear cut is internal to the tcase.
If the input length is anything but .840 you need to swap front case halves like in the thread right below this one.
'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.
sorry im talking about spline count on the input shaft, but i guess everything 91 and up was the 23 spline? not sure. i just know when i did my swap the input shafts were the same length but the donor was a 21 spline so i had to swap it for my 249 23 spline shaft. i swapped over the whole planetary gear set, it was a 1993 to an 1989 case so the ring and sun gears matched up.
still though, his 91 case is going to have the different internal gear cut since the change over was in 94, so he will need to use the front half of his 249.