man i dont know... he said they would work... the guy i bought the stuff from said the third came out of a V6 4runner... maybe some of the v6 thirds have smaller pinion bearings? i have no clue. i am just going by what the man told me... but what you say makes sense...
i bought the other third so that i could just get it set up, so that i could take my axle apart and put it all back together at once... anyway, i am gonna just get this one set up and be done with it... if there are no differences other than the pinion bearing, i dont think a geo tracker with 33s, maybe 35s are gonna put that big of a strain on the pinion bearings.. lol
i hope i dont get screwed... i have done a LOT of business with these guys in the past and have never had a complaint. maybe this wont be my first...