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    Author Topic: rear wheel heat and smell ??  (Read 1627 times)

    Offline 72cudaguy

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    rear wheel heat and smell ??
    « on: July 20, 2009 - 09:25:23 PM »
    Just started to notice something new, funny smell coming from rear wheels and the rims ( rally style ) are getting real hot. It's a restored '72 Cuda. New front disk with rear drum. About 3000 miles on restoration. Any ideas. Thanks, Ed
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    Offline Daves74chally

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    Re: rear wheel heat and smell ??
    « Reply #1 on: July 20, 2009 - 09:45:58 PM »
    That would be some  :burnout: :burnout: :bigsmile: is the brakes holding up somehow? maybe they are over adjusted.
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    1974 Dodge Challenger 414 stroker, 727 trans, 8 3/4 posi [OO/`````\OO]

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    Offline Bullitt-

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    Re: rear wheel heat and smell ??
    « Reply #2 on: July 20, 2009 - 09:58:56 PM »
    Could the emergency brake be on or too tight?
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    Wade  73 Rallye 340..'77 Millennium Falcon...13 R/T Classic   Huntsville, AL
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    Offline 73Chally

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    Re: rear wheel heat and smell ??
    « Reply #3 on: July 20, 2009 - 11:10:48 PM »
    Definitely sounds like brake related.  Either drums are rubbing or E-Brake is on or needs adjusting.
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    Offline jeryst

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    Re: rear wheel heat and smell ??
    « Reply #4 on: July 20, 2009 - 11:49:12 PM »
    Did you change master cylinder or booster recently?
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    Offline 72cudaguy

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    Re: rear wheel heat and smell ??
    « Reply #5 on: July 21, 2009 - 07:14:05 AM »
    The booster is new but coincidently last weekend during a tuning session on the dyno we disconnected the vacuum advance and capped it off at the carb. Would that affect the vacuum to the brakes at all ?
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    Offline moparmaniac59

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    Re: rear wheel heat and smell ??
    « Reply #6 on: July 21, 2009 - 11:33:18 AM »
    The vacuum advance is for your distributor and would not affect your brakes. I would be looking for problems in the areas already mentioned.



                                                       Matt B.
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    Matt

    Offline jeryst

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    Re: rear wheel heat and smell ??
    « Reply #7 on: July 22, 2009 - 12:46:02 AM »
    Your front brakes are supposed to do most of the work.
    Is it possible that the proportioning valve is not working correctly or stopped working, so that your rear brakes are now carrying the load?
    Are your front brakes working at all? Maybe there is something in the line, or they are not adjusted properly, again forcing the rears to work harder.
    Were the brake booster and master cylinder installed during the restoration 3000 miles ago? If the actuation rod that goes into the back of the master cylinder is not the correct one, or is not adjusted properly, it could cause the problem.
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    Offline Aussie Challenger

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    Re: rear wheel heat and smell ??
    « Reply #8 on: July 22, 2009 - 05:52:08 AM »
     Jack up the rear and rotate the wheels and see if there is any resistance, could be dragging shoe, sticking emergency cable or an oil leak from the wheel cylinder or even the axle seal. I have also seen a broken spring inside the drum.
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    Dave

    Offline 72cudaguy

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    Re: rear wheel heat and smell ??
    « Reply #9 on: July 22, 2009 - 08:38:12 AM »
    yes, booster, mc, all brake components, cables, e-brake hardware all new. Everything has worked fine. I'll have to really dive in and take a look. Thanks for all the input, I'll keep you posted
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    Offline 72cudaguy

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    Re: rear wheel heat and smell ??
    « Reply #10 on: July 23, 2009 - 04:39:10 PM »
    So I think we found the problem and it seems to be a seperate adjustable proportioning valve that is going to the rear drums that is bad. I have a new power disk set up in the front. Is that seperate valve going to the rear even needed or is the main proportioning valve enough for the whole system. Sort of ignorant on the topic so working with my mechanic on this one.
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