mnudo200827
New Member
My parents expedition had a whine from the rear end for a short time and now some of the teeth off of the ring and pinion broke. im guessing its a pinion bearing that was bad because my dad changed the outer axle bearings and that didnt fix it. The tag on the differential says S802L and 31 88 ok12. I looked it up online and it says its a 8.8" ring gear and 3.31 ratio. Is that correct? I told them just to swap out the whole rear end from a junkyard one so they dont have to figure out why it broke. But my question is, would a different ratio make a difference? Just as long as its close to the same ratio it should be okay right? its just a 2wd too, so dont need to match gears. Thanks..Mike
