i recently had 3.73's installed in my 1994 mustang gt with automatic transmission. the transmission slips out of gear if i give it too much gas, and goes back into gear when the rpm's go down. it didn't do that before the gear swap, so maybe there's something to that theory about anything more than 3.55's being too much. i haven't yet found out what the problem is. they were just installed tonight.
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