maxmachz

So if one buys the new 140 mph face from Corvette Central, what else must change to make it work correctly at all speeds? New gear in the trans? I searched and found a service that does it, but what is it they do?

Thanks

CaseyJones

I bought an early '79 speedo and tach from a forum member. Now I have a 140 mph speedo and the L-82 tach in my (originally L-48) '80. Seems to be accurate compared to road traffic after driving for several miles so I'm happy. It's a bunch cheaper than the conversion services from my experience. Just saying'...

maxmachz

Good call, I will try that and see what I get for reply

Vette5.5

I've redone speedo faces on 85 mph jobs, when there were more calibration places around. If you look at the inner workings of a speedometer, there's a round magnet spinning inside a metal cup, held back with a clock spring. Speedo shops, change magnet and clock spring strength. You're not wanting to change drive gearing, or the odometer will be way off. Haven't done this in a awhile, but "speedometerrepairguy.com", could surely help out.