Looking for advice. I have an 89 4.0 XJ with the AW4. My neighbor has a dead XJ, same year I think , with a five speed manual. I am thinking ahead and wondering if I should salvage his tranny and think of swapping it in when - or if - the AW4 ever dies. What motivates me is gas prices. Does teh manual get much better mileage? I would think so. Any thoughts.
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