adsm08
Senior Master Grease Monkey
Supporting Member
Article Contributor
Ford Technician
TRS 20th Anniversary
- Joined
- Sep 20, 2009
- Messages
- 34,623
- City
- Dillsburg PA
- Vehicle Year
- 1987
- Engine
- 4.0 V6
- Transmission
- Manual
- Tire Size
- 31X10.50X15
Most rear ends have the gear ratio tagged on it, right? All my Fords have had a tag on the rear end as far as I can recall. It is a pain buying something that has be bastardized, you know??
Most rears do. He said his tag is missing.
And yes, it's a huge pain buying something that someone else has messed with.
In this case, I think we are gonna need to do an actual gear calculation.
Tonka, put the trans in N. Jack up a single rear wheel and mark the inside of the tire at 6:00. Then grab the drive shaft and turn it 1 full turn. See how many times the tire goes around. That number will be your gear ratio.