my speedometer on our 1988 Monte SS is acting weird. the speed gets off the faster you go. Up to 35mph it is correct but the faster you go , it doesn't read correct. at 60 it only shows about 50 or so and won't ever show correct. but when you slow down , it starts getting correct about 35. Any ideas on this .
I thought about that , I’ll give it a try . Not new but it’s been doing it a while . We don’t drive it a whole lot . Just a nice weather cruiser lol. 88 with 42k miles. We are the second owner . My friends mother bought it new . Still Have the window sticker .