You should ask this in the 4g63 section. You will get more hits there... but I will help you out a little.

Only AWD problem I recall is a problem with the transfer cases leaking causing them to lock up while driving. There was a recall on this and in most cases the dealership would replace the transfer case of the problem was bad enough.

Only other problem is the weaker 3 bolt rear end in the 90, 91, and early 92's. The later 92's and on have a 4 bolt rear end with bigger axles and can handle a little more power than the 3 bolt.

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