Rodeos ran a GM 10 bolt rear for the first couple of years ('91,'92?), then switched to a Dana 44 rear. For 4x4 models, it's always been the Isuzu corp. 10 bolt front. Gearing for the Rodeos has been a point of discussion more than once with 4.10 and 4.30 ratios coming up most often from what I remember. Sometimes the differences seem to split between 4x2 and 4x4, sometimes years or engines. I haven't yet seen an absolutely definitive listing (although I haven't been to Wayne's info site lately <img src="/forums/images/graemlins/lol.gif" alt="" />).

I'm not certain about Amigos, since I haven't worked with them myself, but I believe much of the axle optioning was similar to the Rodeo.

James