I had the stock rear with 2.73 gears and i just upgraded to a Moser 12-bolt with 3.73 gears and I now need to recalibrate the speedometer.

I have a TH-700-R4 transmission and I am looking to chage the speedometer driven gear and the speedometer drive gear to recalibrate the speedometer after the gear size increase.

Does anybody know exactly or have any idea on which gear set I need to do this correctly, basically how many teeth the speedometer gears need to have, or a GM part number for the set of the drive and driven gear for 3.73 gears

 

i picked up my speedo gears from SLP

they are for 3.73 and were only 24 bucks

or you could go to gm and get the blue-green set (same as mine)

I they work but as for how accurate they with 3.73's i dont know (I have 3.42's )

Faded

 

Do you happen to know the part number for the speedo gear set you purchased from SLP?

 

no, i cant seem to recall, sorry

if you browse their web catalog their, there

 

well the link didnt work

63006 26.95