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Old 05-23-2014, 10:13 AM   #1
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Rear end help.

So I finally did a rear end swap in my car, and I ran into a problem. When I was putting the calipers back on it took a good 4 hours of trying to get it on the right side before finally we broke the caliper and put the one that came with the GT rear end on instead. I started driving it and i am pretty sure the brakes are constantly touching the rotors in the rear which is not good for power, mpg, or anything. So, are there any differences between the brake set up between a GT and a v6 or something I didn't do right that could be causing this problem? Really need to fix it soon so any help would be appreciated!
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Old 05-23-2014, 10:30 AM   #2
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I started driving it and i am pretty sure the brakes are constantly touching the rotors in the rear which is not good for power, mpg, or anything.
Perfectly normal, pads and/or shoes will rub the rotor/drum surfaces under normal conditions. They will adjust accordingly.
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Old 05-23-2014, 10:32 AM   #3
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Perfectly normal, pads and/or shoes will rub the rotor/drum surfaces under normal conditions. They will adjust accordingly.

What do you mean by that? And by touching I mean it's like driving with your foot always in the brake a little. I think it is causing the wheel to shake and it sounds weird when coasting.
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Old 05-23-2014, 10:52 AM   #4
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What do you mean by that?
Just that. Did you bleed the calipers? When replacing brakes, the first time you push on the pedal, the pads will stay engaged lightly with the rotors. If they are actually locking the brakes, I would think you may have a master cylinder problem in that the pressure is not relieving. Could you have done something wrong in reconnecting the parking brake?
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Old 05-23-2014, 11:09 AM   #5
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I was thinking either replacing the master cylinder or replacing the caliper bolts and stuff because maybe that is keeping it from disengaging?
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Old 05-23-2014, 11:17 AM   #6
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I think I'll take the rotors off and have them cut and see if that helps. They maybe could be warped.
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Old 05-23-2014, 11:24 AM   #7
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I think I'll take the rotors off and have them cut and see if that helps. They maybe could be warped.
Did you have any problem removing the old calipers?
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Old 05-23-2014, 11:25 AM   #8
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Yeah they were a pain to get off and put on. I remember last time I had a mechanic I know replace the pads in the rear and he said it took him over an hour to get the calipers back on.
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Old 05-23-2014, 11:28 AM   #9
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Yeah they were a pain to get off and put on. I remember last time I had a mechanic I know replace the pads in the rear and he said it took him over an hour to get the calipers back on.
Good luck.
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Old 05-23-2014, 02:25 PM   #10
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Did you use a caliper tool? looks like a metal box to compress the calipers.
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Old 05-23-2014, 03:05 PM   #11
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No :p what's that.
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Old 05-23-2014, 05:54 PM   #12
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The metal box fits into the groves of the pistol and you turn it and the piston goes back into the caliper. Probably why they didn't go back on very easy you have to push the piston back in lol
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Old 05-23-2014, 05:59 PM   #13
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Pushed it in with a clamp. Let all the pressure out too when putting it back on because it was so tight. Didn't help.
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Old 05-23-2014, 06:01 PM   #14
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I have no clue what the problem is honestly. Idk why the brakes just won't work this time.
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Old 05-23-2014, 06:01 PM   #15
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A clamp won't budge it because you have to turn it bud. The piston is like a screw turn it to push it in
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Old 05-23-2014, 06:17 PM   #16
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Pushed it in with a clamp. Let all the pressure out too when putting it back on because it was so tight. Didn't help.

Dude, the front calipers Go in with c clamp, the rears go in by TWISTING with a caliper tool. Any auto store will have one.
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Old 05-23-2014, 07:03 PM   #17
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Ah. Well I'm also experiencing insane shaking in my steering wheel after the swap.
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Old 05-23-2014, 10:56 PM   #18
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I would try bleeding the brakes first. If that does not work go to any parts store and get a caliper tool.


There are 2 sets of pads for Mustang rear brakes. The reason is there are 2 types of roaders for the rear brakes. The only difference in the 2 brake pads are the amount of pad. One set of roaders are solid in the center. The second set have space in the roaders. I think it's called air cool technology. You could have mix matched pads and roaders. Don't worry, basically you need to screw the caliper in to fix the brakes. You would not need to bleed the brakes again. Just take the cap off the master cylinder and screw the caliper.


The rear brakes are screw type so the parking brake works. When you pull the parking brake the caliper screw tightens so the car does not go any where.
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