depends on your axle-crawl down to the rear axle and see if you can find a
metal tag bolted onto the differential cover. it should have a letter or
two "A" or "AA" or "B", etc. this letter tells you what u have. for a dana
20 rear:

D 2.73
B 3.31 <----what i have on my 85 cj7 with t176 (4-speed) and 258
A 3.54
H 3.73
C 4.10


if the letters are repeated, it means u have a Trac-Lok differential with
the same ratios as above...

"Jet" <jet@bestweb.net> wrote in message
news:vjaa89p91eu80b@corp.supernews.com...
> anyone know the stock gears ratio in a 86 cj7 5 speed with a 258?
> carmine
>
>