Just did a rear end swap...went from 323 to 410's in a 93 Z. I really don't want my speedo to be all screwed up...is there anyway to fix it?? I know they started to do it digitally in 94 but whats up with the 93's??

 

you need a new gear for the tranny tailshaft, i just got mine today from the dealer it was like 7 bucks.

 

That's only if you're running an auto. If you're running a manual you need to get an SLP speedo recalibration unit. Which they conveniently don't make anymore.