Originally Posted by opelgt73
So I need to either find one made for the 3.89 ratio, which I think will be impossible, or have one custom fabricated.
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When I can figure out how to remove the access plug (opposite the drivegear), I'll be able to remove the gear to inspect it. I just wanted to see if there was any fix or replacement before I tried prying it out. Chris, my transmissions are GT-specific, so they are already calibrated for 3.89s. Perhaps we could use a broken one as a starting point?
How are you switching the 4.11s over to 3.89s? (It would also be possible to use a 1.9L axle and drop in Isuzu 3.90s.)