I'm switching out my transfer case in a couple of days and I just got a used 1998 NP231 from a Wrangler.
My question, is there anything that will not fit from the '98 once I put it in my '91? The '98 was bone stock and all my hook-ups (driveshafts, no SYE, etc) are stock.
The reason I am switching it out is because every time I drive about 10 ft. when I am in 4H or 4L I get a loud pop noise like something is biding up. I took it to a transmission shop and they said it was probably my chain slipping inside the TC. They wanted $400+ to just fix the chain! I figured I could get a used TC and put that in and even rebuild my old one if I really got eager.