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Old 06-14-2013, 11:39 AM   #1
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Brakes and axles swaps

Ok so starting off I have a 99 tj with the 32RH and I have the stock 3.07 gears and am wanting to go with 4.11s but I was wondering if I swapped in a different set of axles would I have to get the same year of axles since the 99s had two different brake rotor thicknesses or could I just get whatever year just get the brake pads and rotors and possibly the calipers for the year of axle I get? Thanks y'all

Blake

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Old 06-14-2013, 12:11 PM   #2
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I could very well be wrong, but I'd guess the only thing you would need to replace would be the rotors if the axle you get has the different sized unit bearing.

Or, you could swap your unit bearings or both entire front shafts w/ unit bearings over to the new axle, and still continue to use your old rotors.

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Old 06-14-2013, 12:24 PM   #3
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I could very well be wrong, but I'd guess the only thing you would need to replace would be the rotors if the axle you get has the different sized unit bearing.

Or, you could swap your unit bearings or both entire front shafts w/ unit bearings over to the new axle, and still continue to use your old rotors.
Well I have a constant squeak coming from my drivers side brake rotor and was kind of wanting to address this issue by hopefully getting a newer axles and using brakes for that axle. I had to go to the part store 3 times to get the rotor that fit somewhat proper and the sound went away for about a week so I went back and they told me they couldn't just keep swapping rotors even though I had the lifetime warranty. Needless to say I haven't set foot into that part store since.
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Old 06-14-2013, 12:42 PM   #4
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you don't need a whole new axle to fix a brake squeak.

swapping to late model unit bearings and rotors will give exactly zero benefit vs your early model unit bearings and rotors.

you just need to know what you have - if you have an early style setup, then order parts for a 98. if you have late model setup, then order stuff for a 2000+. the guys at parts stores don't know the difference, and if you tell them you have a split year of 99, you get whatever parts the inaccurate computer tells them to give you.

figure out what you have - late model or new model, buy the correct parts for it, and use the proper brake lube when you put the calipers back on. check for divots, and repair them with a welder if necessary. there's a write-up on jeepforum.com.
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Old 06-14-2013, 12:48 PM   #5
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When you say constant squeak, is it constant when the brakes are applied, or does it truly always squeak when in motion?

And buying cheaper brake parts with a lifetime warranty might be part of your problem. If you have one of the harder lifetime pads they can squeak pretty badly. I had a set I couldn't quite down no matter what, and since then I've never cheaped out on brake parts again.
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Old 06-14-2013, 01:06 PM   #6
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Originally Posted by UnlimitedLJ04 View Post
you don't need a whole new axle to fix a brake squeak.

swapping to late model unit bearings and rotors will give exactly zero benefit vs your early model unit bearings and rotors.

you just need to know what you have - if you have an early style setup, then order parts for a 98. if you have late model setup, then order stuff for a 2000+. the guys at parts stores don't know the difference, and if you tell them you have a split year of 99, you get whatever parts the inaccurate computer tells them to give you.

figure out what you have - late model or new model, buy the correct parts for it, and use the proper brake lube when you put the calipers back on. check for divots, and repair them with a welder if necessary. there's a write-up on jeepforum.com.
Well my main reasoning of swapping the axles is to get the 4.11 gear ratio. I am wanting to move up to 33s and I pull my jet skis and the 3.07 gears in my current axles aren't cutting it. I'm trying to address all my issues before I move up so that way I don't just end up with more headaches. And my squeak is constant without any pressure being applied to the brake pedal, but when i press the pedal i get a loud clunk. I took my front wheels off and the drivers rotor has a lot more movement than the passenger side and no it's not due to the rotor being rusted to the unit bearing. I'm assuming they gave me the wrong rotor. I just wanna fix this all in one shot.

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