Hy randy0563, look for a low oil level in the diff., when cold the oil should come up to the level of the fill plug bottom thread, the fill plug is located in the rear cover of the differential housing. Some people like to jack the truck up first on one side, then the other and let it sit in that position for ten minutes or so, so the oil runs down to the outer ends of the axle tube to lubricate the bearings, but I think if the lube level is correct, the oil will find its way to the bearings, it's up to you. Now as to the return springs, I'm going to assume you have the 15"X4" rear brakes, I can't find one kit that has all the components. The kit that has the long springs 2 3/4" is Raybestos p/n H500 $3.04 Can.dollars at RockAuto, this kit has eight springs in it enough to do the whole axle, the kit that has the short springs in it is Raybestos p/n H337 it has enough short springs to do one wheel, plus two springs you don't need $5.58 Can. dollars at RockAuto, hope that helps.
