I had a '92 LX AOD car with 4.10 gears. The speedometer gear the shop put in was chewed apart within a few months. I actually ended up putting in a red standard gear which is for standard 3.73's and it was very close to accurate...not sure on tooth count. (Already had it laying in my garage from a previous car.) So I would imagine you could do the same, and since you have 3.73's you should be very close as well.
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1990 NMSP Unit 130 SOLD
1989 WSP SOLD
1988 FHP SOLD
1991 FHP SOLD
1993 TX DPS
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