Rear gear ratio
Thread Starter
Heel & Toe
Joined: Nov 2007
Posts: 17
Likes: 0
From: Ottawa Lake Michigan
Rear gear ratio
First of all, thanks to everyone that helped with my cam install. Everything went great. Now the problem.... PCMforless did the tune for me. Everything is fine except the speedometer is off approximately 10MPH when going around 70MPH. I gave them my exact tire size but couldn't find any info on my rear gear ratio and made the assumption that being an automatic, it is 2.59:1. Perhaps I was wrong? How can I determine exactly what it is so I can inform Bryan at PCMfor less???
Drifting
Joined: Apr 2007
Posts: 1,339
Likes: 2
From: port charlotte fl
Jack up the rear wheels and mark the drive shaft.Have someone help you turn the wheels one full turn together and count the revolutions on the drive shaft.That will be your rear ratio.i.e. three and a half turns is a 3.54.
Thread Starter
Heel & Toe
Joined: Nov 2007
Posts: 17
Likes: 0
From: Ottawa Lake Michigan
