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Brake issue
#763507
08/02/10 02:35 PM
08/02/10 02:35 PM
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Joined: Sep 2004
Posts: 1,281
wisconsin
kmfdm
OP
pro stock
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OP
pro stock
Joined: Sep 2004
Posts: 1,281
wisconsin
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A friend of mine is having a brake issue with his 75 Duster. A while back he converted it from drum to disc brakes (later A-body stuff). Not sure when it started, but now he complains that both of his front calipers are sticking. When we put the car in the air and tried to spin the front wheels, they only spun about 1/8-1/4 turn. With the car rolling you can hear something hanging up as well. Do you think this a caliper/brake hose issue, or could it be the proportioning valve (he never chnaged it).
74 Dart Sport
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Re: Brake issue
[Re: 05dakota]
#763509
08/02/10 03:47 PM
08/02/10 03:47 PM
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Joined: Sep 2004
Posts: 1,281
wisconsin
kmfdm
OP
pro stock
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OP
pro stock
Joined: Sep 2004
Posts: 1,281
wisconsin
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yes. it has an aluminum newer style one in it currently.
74 Dart Sport
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Re: Brake issue
[Re: kmfdm]
#763510
08/02/10 06:12 PM
08/02/10 06:12 PM
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Joined: May 2004
Posts: 679
N.E Indiana
repad
super street
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super street
Joined: May 2004
Posts: 679
N.E Indiana
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Quote:
A friend of mine is having a brake issue with his 75 Duster. A while back he converted it from drum to disc brakes (later A-body stuff). Not sure when it started, but now he complains that both of his front calipers are sticking. When we put the car in the air and tried to spin the front wheels, they only spun about 1/8-1/4 turn. With the car rolling you can hear something hanging up as well. Do you think this a caliper/brake hose issue, or could it be the proportioning valve (he never chnaged it).
I have used an adjustable proportioning valve from Summit to solve this problem.
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Re: Brake issue
[Re: kmfdm]
#763511
08/02/10 06:17 PM
08/02/10 06:17 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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It almost sounds like he has the wrong rotors on the spindles? Are the wheel bearings tight?
He'll need a proportioning valve with disc brakes that you don't need with drum brakes.
Another thing that comes to mind is the MC push rod, is it correct length?
Last edited by Challenger 1; 08/02/10 06:19 PM.
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Re: Brake issue
[Re: kmfdm]
#763513
08/02/10 07:23 PM
08/02/10 07:23 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Quote:
It almost sounds like he has the wrong rotors on the spindles? Are the wheel bearings tight?
He'll need a proportioning valve with disc brakes that you don't need with drum brakes.
Another thing that comes to mind is the MC push rod, is it correct length?
The rotors are correct. All the parts came out of a 74 Dart donor car, and the rotors were ordered for that application. Not sure about the push rod length though. I'll tell him to order a proportioning valve and go from there.
The lack of a proportioning valve will not cause the calibers to drag on the rotors.
I've seen the wrong bearings being used before and cause the rotors to rub things they usually don't.
There more than likely is a mechanical issue with the parts he has now. 
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Re: Brake issue
[Re: kmfdm]
#763514
08/02/10 10:50 PM
08/02/10 10:50 PM
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Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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(1) make sure there's no RPV in the disc half of the M/C (next to the firewall) (2) clean the caliper horseshoe adapter "ways" (where the caliper slides)(3) get some rebuilt calipers (they're cheap ~$15) and fyi 76 A body and all F body calipers have a 2.75" bore whereas 73-75 A body ones are 2.60". Some calipers just start dragging somewhat for no reason. If mixing/matching calipers note the hose/bleeder locations you need as they vary.(take your old ones in w you)
Last edited by RapidRobert; 08/03/10 01:25 AM.
live every 24 hour block of time like it's your last day on earth
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Re: Brake issue
[Re: RapidRobert]
#763515
08/03/10 12:56 AM
08/03/10 12:56 AM
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Joined: Mar 2005
Posts: 862
Iowa State fan
kilroy
super stock
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super stock
Joined: Mar 2005
Posts: 862
Iowa State fan
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Hope he didnt use a almun master from a fwd car they wont work. found that out the hard way, they hung my rear brakes up bad, switch to a master off a van problem solved.
1973 Charger, former SE, former auto
I'm not trying to be difficult, it comes naturally....
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