Topic: Rear gear ratio???

[brooksman9]

Hey All, I was looking at my build sheet at the axle code and it says "2PE". This is on my 81 Formula. From what I can decifer from gary lisk's site I believe this is a 3.42 standard rear end, and since it revs at about 3 grand going 70 down the highway I do not believe it is the little 2.73 that I originally thought. I can't seem to find any rpo decoders although I know the formulasource used to have one. Can anyone confirm this for me? Thanks

[Joker (§ir£Ğragon)]

I come up with the same thing you do when I check other sources (doing a web search).

[7795TAs]

This site might help you determine what gears you have.

http://www.miata.net/garage/tirecalc.html

[Hitman]

Actually, try this one

http://www.4lo.com/calc/gearratio.htm