I recently bought what I was told was a 4.88 3rd member for my 92 pickup. After pulling it apart for a no-slip locker install, I counted 7 teeth on the pinion after thinking it was originally 8. I recounted the freshly pulled ring gear and came up with 37 teeth. So, basic math here says 37 div by 7 equals 5.285, or 5.29's, correct?

Probably the dumb question for the day. I'll attempt to add pics of each.

 

Yes. 5.29's

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

 

Sounds like you lucked out! What kinda locker you puttin in?

 

Yeah, I did luck out. ironically I was leaning towards 5.29s but found this on craigslist, thinking 4.88s will be okay. Powertrax no slip goin in, also courtesy of craigslist.