Join Date: Jan 2006
Location: Northern California
Thanked 2,154 Times in 1,716 Posts
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Without knowing what the previous owner went through or why the brakes had to be rebuilt in the first place, I can only assume the basics. Brake fluid will do exactly what your describing. If there's a leaking rear cylinder it will contaminate the shoes and they WILL want to grab. You'd think it would be the other way around but not the case. Maybe upon rebuilding the brakes the last owner decided not to replace the shoes for whatever reason and they were contaminated. But nonetheless, it seems your issues have progressed and caused the drum to warp. When it comes to brakes, I have been known to just start over and replace everything just so there's nothing to cause a weak link. I'm not saying you need to do this but diagnosing brake problems is like chasing a greased chicken. Usually guys complain about weak rear drums and opt for the GM cylinder upgrade. Not the other way around. I think my rear drums work great, except for that first braking in the morning on a damp or rainy day. It'll try to launch me through the windshield if I'm not paying attention.
'01 2500 Sport 4x4 5spd w/Fastcoolers, Mag-Hytec, EZ, RV275's, 4" w/o muffler, South Bend, Steering brace, aFe, 2 lo kit, Isspro Boost, FP, and EGT on pillar, Westach Trans/Diff temp gauge in dash pod, Raptor 100 w/ 1/2" line, Pac Brake, Rancho 9000, 285's