Hey guys, a good buddy of mine has a 67 Chrysler 300, and has been having a ongoing issue with his rear brakes. And is completely confounded by the issue.
Specifically, with his drivers side rear only. Brakes are all new, new drums, shoes, hardware, wheel cylinders. Shoes on correctly. Starwheel free and correct for that side. New fluid, bled. Adjusted initially with just a hint of drag. Within a single drive the rear brake is dragging. After a few k's the rear brake is smoking hot, can hardly get up the driveway. Jack it up and the wheel will hardly turn. By the next morning...the drum comes right off... by hand! Back together, it's the same result every time. Should also ad he had the issue before the rebuild, and never uses his parking brake.
He's also adjusted the axle collar (mopar), and is in correct range of axle endplay using a dial indicator, .013. Bearings are good, no up and down play, no leaks at the seals.
We're both at the end of our game on this one. One brief theory thought up last night, was perhaps the axle line to that wheel is partially blocked and will not allow the wheel cylinder to return? High pressure on apply is fine, but low pressure on return cannot pass the restriction? It cannot be any further upstream, as both rears would likely be affected.
Any ideas we could pursue on this?
Thanks, Mark
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67 Grande Parisienne 4 door HT. 69 Parisienne Convertible.
When the brakes are hot and stuck on, open the bleeder on the affected wheel cylinder and see if the brake releases. Then you would know if its a mechanical or hydraulic problem.
Wild shot in the dark here, but auto-adjust system isn't installed backward, is it? The auto-adjust should adjust the brakes tighter but it should do so only when you're backing up. If they're installed the wrong way around, they'll ratchet up the brakes when you apply them going forward.
I recall having this issue back in the 70's. Can't remember what the vehicle or specifics, but it taught me to always do the brakes on one side, then the other so I had a reference as to how they go back together!
I had this problem on the drive side front after installing all new shoes, wheel cylinders, hardware , MC, and
Fluid. Adjusted numerous times, same result. Had a set of almost new shoes (but likely 10-20 years old) off the 63 convertible I parted out, I switched the shoes and hardware and it worked fine immediately. The shoes I put on were obviously much better quality than the ones just bought.
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63 Parisienne sport coupe (The Big GTO), black, maroon interior, 409 4 speed; former owner of a 59 El Camino, 63 Corvette SWC, 62 Chev Bel Air SC. 1963- Pontiac top selling car in Canada
Mahone Bay, NS Still not old enough to need an automatic
