Speedometer
 

the speedometer reads 80 and 90 miles while driving but I can see cars passing my truck. I had manual transmission and converted into 700r4.
how can fix to read correctly.

Re: Speedometer
 

you need to change out the drive gear and driven gear in the rear of the trans, i need to do this myself as mine is broke check out www.bowtieoverdrives.com they have a calculator to figue out what you need and can also buy them there, click on the speedo gears tab and click on drive gears or driven gears and the view details under the gear is where you should find the calculator to figure out what you need