What do I need to correct the spedometer? I know I need the grey drive gear, a 45 tooth driven gear, and a seal for the tail end of the tranny. Anyone know what else I need? Will I need a new sleeve for the driven gear? And does anyone have the part number for these gears? The dealership keeps coming up with the wrong driven gear, for a cable speedo, and I'm not sure if the FAQ has the part # for electric speedo either. Are the drive gears the same for cable speedo and electric? I want to have all the parts I need when I get this thing apart.

 

I did the same swap here's the GM #'s
#8642620 gear
#25513051 gear
#10456089 sensor

 

Hey, thanks!
Wait, what's up with changing the sensor? Will the one I have not work?

 

ttt

 

Whats the part number for a 3.42 rear speedo gear. I just did a 2.73rear to 3.42rear and usued the old posi.