When I bought the van 5 years ago, it had been lowered quite a bit with stock rear spring plates and front beam welded adjusters. It has stock steel wheels and stock size tyres, which need replacing. I have done the fronts no problem with new steel wheels and van rated tyres. I would like to put the new wheels and tyres on the back, BUT, jacked up the rear on the axle beam and the wheels won't drop down far enough and even with the shocks off, the spring plates won't come down to the bottom stop. Plate sits about halfway. Rear bump stops are cut in half, standard size shocks on the rear. The van ride is very hard and bumps and bangs out on the road which is hurting. With the van jacked up I can push the wheels up and down a bit, but not far enough to slip the wheels out. Strangely the rear tyres were replaced just before I bought the van and I have the invoice to prove, so how did they did they fit them? I am getting on a bit in years and not so much energy these days, but would like to fix it myself. I am wondering if the torsion bars are worn and lost tension. The rear tyres are not van rated with only 2 ply walls and they are starting to crack near the rims, so need to replace. Any help or ideas would be appreciated.