My friend asked me a question the other day that kind of stumped me so I am hoping you guys can clear it up. How are electronic speedometers recalibrated? You know like when you go from 2:73 gears to 3:42s. Can anyone enlighten me?

 

i didn't change mine on my other 86 T/A, but you can go the your local speed shop and get the correct speedo pickup sensor for the trans, but i could be wrong but i think this is correct, at least it works that way for a cable driven speedo.....hope this helps, i'm sure there are others here that know more about this than me.

 

Im pretty sure its just different size gears for the sensor, just like a cable driven speedo.

 

So a gear huh. Interesting. Thanks for the replies you learn something new everyday

 

Yeah, the trans-mounted VSS is gear driven, just like the cable thimbles. The dealer usually has a selection of gears that will get you close engough, ubluss you've done something drastic like changing from a 2.56 to a 4.88, in which case the drive gear on the output shaft needs to be replaced as well.