You`ll have to readjust spur gear, mine was way to tight. You might want to check the gears in the trans and put some black grease on them. I checked mine and was bone dry. It`s alot quieter now. I also had to buy new diff cases front and rear, got fed-up with the lock tite they put on the screws. Get that sticky grease out of your diffs and run 50,000 wt. oil in them. Makes the whole truck better. I`m going to try and get the center diff apart this weekend and do something with it. Joe