I am finally getting my 89 Black 4x4 Burb now that the title stuff has been worked out so I can bring it into Canada. The trans is pooched in her. I bought a wrecked 90 Burb 4x2 that had the trans done about 10k ago and this is for sure that is why I bought the wreck. Will the trans from the 90 4x2 bolt right in to the 89 4x4 or are there some things that have to be changed/adjusted etc.

I don't belive the 4x2 trans will just bolt right in. But I could be wrong. I know the tailshafts are proably different for the transmissions. One with transfer case and one with out. But I could be wrong though. Maybe some others will jump in here with an exact answer.

same thing here... there's got to be a difference at least with the tailshaft for the transfer case to fit. sorry i don't know exactly.

you will have to take them apart and switch the tail shafts

Not to thread jack this, but sort of on topic, is a NV4500 swap -- anyone done it?

Hi to all, I just got a 91 Suburban 4x4 GMC. I love this thing but I want to get a ganny gear in it for PULLING and to keep me from speeding off the line (bad habit) It's automatic, is this something that can be done????? About how much would it cost??????And It has a 350 in it, is it a 1500 or a 2500.???