Brake pressure appears to be insufficient at rear wheel cylinders -1984 chevette drum. Made sure no air in lines already. Rear wheels will turn while in drive - will not hold while up on jack stands. Linings have been adjusted to maximum distance before locking drums. Is it the proportioning valve which appears to be none re-settable or is it the master cylinder going to bypass.
Sunday, October 14th, 2012 AT 8:10 PM