i have a 1990 jeep cherokee. i have a dana 30 front and dana 44 rear. i know that to upgrade to 4.56 gears from the 3.55's you have to change the dana 44 carrier. i'm putting in a locker so that doesn't matter. my question however is if you have to change the carrier in the front as well. probably a stupid question, but i am new to this. I just bought my jeep a couple of months ago.