I have a D28 under my truck and It has a blown pig. If I lock it in 4x4 it wont move with the hubs locked it binds up. If I put it in 4x4 and dont lock the hubs the truck moves but the pic screeches and bangs the whole time. I can jack it up all the way around and it will spin the front wheels with no wieght on them so I know the axles are good. My thing Is I am trying to sell the truck and want to swap it out before I sell it. I need to know a general time frame it would take to just rip it apart and slap a new pig on it and put it back together I work on cars and trucks all the time but I never messed with these front rears. If its going to take me a day or 2 to get it done I dont really want to it and lose a potential sale. So pretty much how long should it take to start with the truck togeather pull the front rear apart and put it back togeather