Mike,

Thanks for the tip. That was the next resort, short of having to count teeth <img src="/forums/images/graemlins/smile.gif" alt="" /> It turns out that the ratio is in the owners manual, and its 4.30:1. I'll double check before I order, but it looks like I've got it figured out.

1992 Isuzu Rodeo, newly rebuilt 3.1L v6 and rear diff; clear corners, bumper and tails; Aiwa MP3 head unit; Infinity Perfect 10.1 sub; Polk seperates; Sony cross and amps.
Next projects -- New paint, tint, billet grill, nerf bars.