Ihave a 52 chevrolet 4600. I have had the rear cylinders rebuilt they were stainless lined with new seals. I have fitted them. I have also cleaned and fitted the shoes.I have a problem in that even though i have the adjuster wound right in drivers side rear is not letting off properly it appears to be holding on. I have jacked up the truck to test and the passenger side lets off fine. Does any body have any ideas. Thanks Howard.