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Alright, so I have a 2wd 1988 150 with the 3.55 axle. That's great and all on the road, but if I need to go up a moist grassy hill, I just spin and go back down again.(not to give a sob story or anything, but it almost got stuck because I had to move over and stop for a fire truck)
So I've decided to switch it with a used locking rear with the same gears, and I was wondering how difficult it would be, or if there are any modifications needed for the swap.
if you have the whole locking rear end housing and everything just jack up the truck and loosen a few bolts and out with the old in with the new. now if you are trying to get in there. take it to a shop