I'm almost sure its the old crappy 35, but Im looking at a Ford 9 for the rear and a Dana44 from a Bronco. but in the mean time a quick change in gear set may be an option till I blow the damn thing apart. Did all 4cylinders come with 4.10 rears? The other option is a 60 and 44from a FSJ. Maybe I should just get a M715 and just drive it!