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Old 05-10-2017, 01:42 PM
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JKU wrangler unlimited rear brakes rebuild?

two service shops have told me my rear brakes need a "full rebuild".

why can't i just replace the pads if rotors are not gouged or damaged?

am i missing something?

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Old 05-10-2017, 03:54 PM   #2
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The original rear brakes wear out very fast (mine in under 30,000 miles).
You can get all new OEM (slightly better) pads and rotors from RockAuto for $125 for both rears, total.
Easy to do it yourself.
If you want the link to the exact parts, let me know.

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Old 05-10-2017, 04:00 PM   #3
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37K on my new to me 14 so I better get ready. For the cost of rotors I will just replace them.
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Old 05-10-2017, 08:11 PM   #4
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You could also upgrade to the Terraflex Big Rotor Kit on the rears if you are going to replace the rotors anyways.
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Old 05-10-2017, 08:39 PM   #5
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You could also upgrade to the Terraflex Big Rotor Kit on the rears if you are going to replace the rotors anyways.
Isn't this going to upset the front/rear brake balance if you just replace the rears?
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Old 05-10-2017, 08:45 PM   #6
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I am not sure......If so, hopefully someone will chime in as I am considering doing the rear's sometime soon (my JKU has 26K).
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Old 05-10-2017, 10:37 PM   #7
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It's not such a bad idea to replace rotors when you replace pads; I always do. Rotors can warp on you, so why not just deal with it once instead of twice. You could take the rotors to a shop that can mic them to see if they can be turned to true them up; one way to save some coin as long as they're still within specs.
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Old 05-11-2017, 11:37 AM
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yeah - that's my question though: why can't ONLY the pads be replaced? isn't that cheaper?

the rotors shouldn't, theoretically, be a problem - they are designed to mount pads so only they need to be replaced. it sounds like an auto service false recommendation, like changing your oil every 3000 miles BS.
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Old 05-11-2017, 12:51 PM   #9
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yeah - that's my question though: why can't ONLY the pads be replaced? isn't that cheaper?

the rotors shouldn't, theoretically, be a problem - they are designed to mount pads so only they need to be replaced. it sounds like an auto service false recommendation, like changing your oil every 3000 miles BS.
Rotors certainly do wear out, get grooved, heat crack, etc. The rotors have been grooved/shaped by those specific pads, if you replace pads only chances are very high you will get abnormal wear or possible squeal.

You need to ask the shop. The fact that two different shops suggested it means there might be merit. Also, just because they look ok doesnt mean they are. Its possible they are worn down to their minimum thickness, or the backside has damage. Plus, rotors are so damn cheap that many times i just replace pads and rotors at the same time rather than having them resurfaced.
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Old 05-11-2017, 04:36 PM   #10
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Rotors are only about $80 a pair, turning them is usually $25-35 a pair and sometimes a pain to get a place to it. If the rotors are worn badly just replace them, if they have an even wear pattern, just turn them.
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Old 05-11-2017, 05:37 PM   #11
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Don't get the big brake kit rear unless you have a manual transmission. The big brake rear will good your warranty on the automatics. The back pressure on the transmission is to much. Even in manual you have to put it in neutral. So mopar does t offer the rear big brake it.
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Old 05-11-2017, 05:47 PM   #12
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Don't get the big brake kit rear unless you have a manual transmission. The big brake rear will good your warranty on the automatics. The back pressure on the transmission is to much. Even in manual you have to put it in neutral. So mopar does t offer the rear big brake it.
What do you mean by the back pressure is to much for an automatic transmission???

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Old 05-12-2017, 08:39 AM   #13
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If the rotors aren't scored, check them for run-out. If that's within spec, I'd put on a set of ceramic pads and declare victory.
If the run-out is out of spec, I'd get a set of grooved rotors and mount them with good ceramic pads.

I replaced my OEs with ceramic and they've been on over 40,000 miles and aren't even half worn. The pads have a lifetime warranty too ---- so when they're toast, I'll get rotors and a set of free pads.
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Old 05-12-2017, 09:16 AM   #14
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Like Hilldweller said if the rotors are good slap some pads on and ur good. Do it yourself.

Never have rotors turned. If they're warped the warp will soon show itself again. If they're not warped you now run a much higher likelihood of warping a turned rotor.

Biggest scam on brake jobs are the rotors being replaced. So few people work on their own vehicles anymore shops are raping people on their ignorance.
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Old 05-12-2017, 09:34 AM   #15
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I had to replace my rear calipers bc one was binding. It was the first time I worked on brakes. It was really easy, a few questions on this forum and some youtube videos. just bleed them afterwards. You will save hundreds and know your jeep that much better.
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Old 05-12-2017, 10:00 AM   #16
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37K on the jeep I just bought so will be doing them soon. Any thoughts on the drilled and slotted rotors I see for sale with pads?
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Old 05-12-2017, 10:37 AM   #17
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37K on the jeep I just bought so will be doing them soon. Any thoughts on the drilled and slotted rotors I see for sale with pads?
Yes, dont do it. Totally unnecessary, a waste of money, and asking for trouble when it comes to trail riding and getting dirt and debris into the holes or slots. Pass.
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Old 05-12-2017, 11:35 AM   #18
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....I personally like drilled rotors.... Just gotta make sure you keep them clean.
I also like the cryogenic treatment.
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Old 05-12-2017, 06:06 PM   #19
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Isn't this going to upset the front/rear brake balance if you just replace the rears?
No. Brakes can be replaced in sets; fronts/rears or both. Just don't replace only one side on the same axle and not the other.
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Old 05-12-2017, 06:13 PM   #20
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Rotors certainly do wear out, get grooved, heat crack, etc. The rotors have been grooved/shaped by those specific pads, if you replace pads only chances are very high you will get abnormal wear or possible squeal.

You need to ask the shop. The fact that two different shops suggested it means there might be merit. Also, just because they look ok doesnt mean they are. Its possible they are worn down to their minimum thickness, or the backside has damage. Plus, rotors are so damn cheap that many times i just replace pads and rotors at the same time rather than having them resurfaced.
I agree. Back in the day I used to have the rotors turned/cut. Over the years I've found that I've had a lot less problems if I replace the rotors when I change the pads. I also use new clips for the pads. JK OEM rear rotors also have a tendency to have excessive rust on the interior surface where the parking brake shoes contact the rotor.
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Old 05-13-2017, 02:24 AM   #21
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No. Brakes can be replaced in sets; fronts/rears or both. Just don't replace only one side on the same axle and not the other.
I should've been more clear - the post I was referring to said "upgrade", not "replace". I'd think that if you upgrade just the rear, you'll become more likely to fishtail because of the rear wheels losing traction upon hard braking, and it may also upset the ABS if it's not smart enough.
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Old 05-13-2017, 08:51 AM   #22
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I should've been more clear - the post I was referring to said "upgrade", not "replace". I'd think that if you upgrade just the rear, you'll become more likely to fishtail because of the rear wheels losing traction upon hard braking, and it may also upset the ABS if it's not smart enough.
I would not just "upgrade" the rears. Fronts or both.
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Old 05-13-2017, 09:06 AM   #23
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It sounds like I should just replace the pads on the rear when they wear out and wait and do big rotors or a full bbk on the front and big rotors on the rear when the fronts are ready for replacement.

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