by GBBiker » Wed Jan 06, 2010 5:31 pm
Check the leaf springs. There should be three layers of springs on each side of the rear axle. It is not uncommon for the middle leaf to break and fall off, not being noticed until the van sees an enthusiastic MOT tester.
Also check the rubber bump stops and the shocks. It would also be worth checking the LAV spring isn't broken or seized (this sometimes leads to snatchy rear brakes when unladen).