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Old 10-12-2016, 08:52 PM
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Rear Rotors..Wow

I love my 2013 Grand Cherokee. So I decided it was time to do all 4 rotors and pads. I start the job yesterday morning...fronts peace of cake. Takes me an hour to do fronts. I start the back and wtf...lol Who the hell thought it was a good idea to put shoes as parking brake inside the the damn rotor? Took me six hours to bang the driver side off. Ripped off the shoes in the process. Went out and got new shoes for the e-brake. Still struggling with the passenger rear. Any of you guys run into this issue? Shoes were pretty much rusted to the rotor. No idea how the wheels are able to spin.

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Old 10-12-2016, 09:21 PM
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Re: Rear Rotors..Wow

E-Brake shoes have been inside the rear rotors on many vehicles for quite a while. Hope you purchased new brake shoe hardware.
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Old 10-12-2016, 11:22 PM
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Re: Rear Rotors..Wow

Quote:
Originally Posted by J.damone View Post
I love my 2013 Grand Cherokee. So I decided it was time to do all 4 rotors and pads. I start the job yesterday morning...fronts peace of cake. Takes me an hour to do fronts. I start the back and wtf...lol Who the hell thought it was a good idea to put shoes as parking brake inside the the damn rotor? Took me six hours to bang the driver side off. Ripped off the shoes in the process. Went out and got new shoes for the e-brake. Still struggling with the passenger rear. Any of you guys run into this issue? Shoes were pretty much rusted to the rotor. No idea how the wheels are able to spin.
I really hate to ask the obvious, but did you have your park brake on?

The park brake has a star adjuster just like drum brakes of old, you could have removed the plug and used the appropriate 'star adjuster' tool to back off the shoes.

Which leads me to one of the major problems for people that never use the park brake, the components rust and 'freeze up' and then if someone were to use the park brake you end up with the brake shoes locked against the drum.

I really don't miss rear drum brakes, but a lot of manufacturers still use them for the park brake as you can get more 'hold' force from the drum based park brake than from the disc based park brake.
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Old 10-12-2016, 11:59 PM
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Re: Rear Rotors..Wow

Are you sure this was the actual problem and that you didnt just not see the rubber ring on the hub right by the rotor edge? If you dont remove that first it makes removing the rotor very very difficult. Sometimes it can be hard to see. I find it odd that the parking brake setup on a 2013 is that badly deteriorated.
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Old 10-13-2016, 12:14 AM
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Re: Rear Rotors..Wow

Hey guys, the parking brake was off of course as well as the rubber ring. I even adjusted the star adjuster all the way and still stuck. I was also surprised how much rust had built up on the stock rotors. I never used the parking brake so I think that might have been the issue. I sprayed it so hopefully it gives a bit by the morning. Looking closer at the side that I removed it feels like the rotor wore the shoe in such a way that it has a lip that hangs on to the rotor on the inside.
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Old 10-13-2016, 10:43 AM
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Re: Rear Rotors..Wow

Quote:
Originally Posted by J.damone View Post
..... Looking closer at the side that I removed it feels like the rotor wore the shoe in such a way that it has a lip that hangs on to the rotor on the inside.
If you're referring to a "lip" on the edge of the rotor, where it passes over the p/b shoes, I'll toss this out for discussion.

In theory, your p/b shoes shouldn't ever wear out, because you don't use them to slow the vehicle, during normal driving. They're primarily there to back up the transmission's "parking pawl", when the vehicle is stopped, by applying force to the inside of the rear brake rotors.

From what I've read, on a couple of Corvette based websites, since Corvettes have a similar system, is that that "lip" sort of acts as an "adjustment gauge" for setting the p/b shoes. You expand the shoes until the rotors are a tight fit over the shoes, as defined by this lip, then when you slide the rotors in place, the gap between the shoes and rotors is correct. At least that's my interpretation of what I've read on this topic.....
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Old 10-13-2016, 11:49 AM
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Re: Rear Rotors..Wow

Honestly I was surprised at the condition that the the shoes and the rotor were in. Rust everywhere. We had some flooding in my area a few weeks ago and I drove through some pretty deep water but I can't see it going this bad because of that. We do get a lot of salt during the winter so maybe that made it worse. I got it all back together now. Maybe I should use my parking brake once in a while.
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Old 10-18-2016, 08:57 AM
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Re: Rear Rotors..Wow

Sorry to say but that's pretty standard. The GM trucks are just as bad. You basically destroy everything trying to bang the rotors off. A piece of advice - periodically use your parking brake from maybe 10mph just to wear the rust off of the insides. That will help prevent such an issue in the future. Also purchasing a higher quality rotor that has some surface coating (zinc, powdercoat, etc) instead of the standard unfinished steel rotors will also extend the life and help prevent rust.
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Old 10-18-2016, 10:30 AM
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Re: Rear Rotors..Wow

i just replaced my rear pads last week and now my fronts are making some weird noise...guess it's just a coinicidence
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