[cppursell]

Originally Posted by 68gmsee

Do a search above and you should find several threads on it. I used "driven gear" but you can play with it to see what comes up. Here's a couple of sites.

http://www.transmissioncenter.net/sp...n_______va.htm

Thanks for that link. On the page there are these "GM / Dodge / Ford Ratio Adapters" that would seem easiest to install. As a matter of fact, looking under the truck to where the speedometer cable goes in, there is one of these installed already, although obviously it's not enough. If this is the way to go, then now I just have to find out what percentage the speedometer is off then buy the appropriate adaptor. Sound good to you?

Thanks for all your replies!