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-   -   need new calipers (http://www.wranglerforum.com/f282/need-new-calipers-138562.html)

zimi117 02-09-2012 12:49 PM

need new calipers
 
I need new brake calipers on a 98 tj 4.0 auto. They seem to be sticking and causing my wheels to lock. A mechanic said he would charge me 60 to install but would it be easy to do myself? I'd rather do it myself and maybe spend the savings on the parts. What companies would you guys suggest? Not looking to break the bank I'm on a college budget :banghead:

DevilDogDoc 02-09-2012 01:04 PM

Don't get A1 Cardone rebuilds. They are crap.

spy 02-09-2012 01:39 PM

I just got one side replaced just the caliper though and it was 83.00 with installation, my pins where sticking locking the caliper up on the passenger side. I would just pay someone to do it right if your not sure on what to do. Although it isn't to hard brakes are your biggest safety concern on any vehicle. Good luck! Also pick up one of those chilton manuals for the jeep, they come in handy.

snwchris 02-09-2012 01:46 PM

You can get calipers for about $25ea depending on the auto store. Replacing them is easy, just need to bleed the line after connecting them. It makes it easier if you have 2ppl to help bleed the line. Make sure to pickup a bottle of brake fluid when you buy the caliper to refill or add to the resivoir

zimi117 02-09-2012 07:38 PM

Cool. How can I tell if I should replace anything else. Also is there any good writeups with working on brakes?

yoopone 02-09-2012 09:16 PM

Quote:

Originally Posted by DevilDogDoc (Post 2010732)
Don't get A1 Cardone rebuilds. They are crap.

Why don't you like your A1 Cardone rebuilds? I put them on 1 year ago and have had no problems. What should I look out for?

DevilDogDoc 02-09-2012 09:25 PM

I have had more than one set come out the box looking as bad as the ones that I sent back. I have had seals start leaking on the first pump on the bleed and pistons that were scored all to hell. Luck of the draw maybe but sometimes it seemed like they took the cores in, cleaned them up a little and threw them in the box marked rebuilt!

snwchris 02-10-2012 08:19 AM

I usually just buy the Duralast from Autozone, since my jeep see's alot of offroad time and trails, no need to spend big money on them.

Jeep TJ Front Disc Brake Pads and Rotor Replacement

03_TJ 02-10-2012 10:35 PM

Quote:

Originally Posted by snwchris (Post 2013498)
I usually just buy the Duralast from Autozone, since my jeep see's alot of offroad time and trails, no need to spend big money on them.

Jeep TJ Front Disc Brake Pads and Rotor Replacement

My caliper seized yesterday, so I replaced everything today (I toasted the caliper limping home).
That's cool; I just saw this thread found that link this morning and came here to post it, and you beat me to it. Those are great instructions, and it is pretty easy...it's hared to bleed them after you've finished.
They're not kidding you need two people, I gave up after 15 minutes of pumping anf catching fluid...I'll have to finish it tomorrow, if someone stops by to help. :surrender:

03_TJ 02-12-2012 12:23 PM

Well, I found out why I couldn't bleed the brakes off. I mounted the calipers upside down!
Make sure the bleeders are facing up. It is possible to bolt them in upside down. Duh!

zimi117 03-02-2012 06:37 PM

So i replaced the calipers and bought new pads too. Drove it for two weeks and all was fine. Now today in traffic the lock all the time. Not quite sure how to fix this. Please help

Black Magic Brakes 03-02-2012 10:23 PM

Quote:

Originally Posted by zimi117 (Post 2095896)
So i replaced the calipers and bought new pads too. Drove it for two weeks and all was fine. Now today in traffic the lock all the time. Not quite sure how to fix this. Please help

Are they locking up or dragging? What brand of caliper did you buy and install?

Is the brake light on the dash on?

When is the last time you adjusted your rear brakes?

zimi117 03-02-2012 11:09 PM

Advanced brand. Brake light is not on but pressure does not feel consistant. Pedal will have no good pressure then it will presurize hard causing wheel to lock and skid. It's in the front.

zimi117 03-03-2012 10:31 AM

Anyone?

Black Magic Brakes 03-03-2012 10:42 AM

Quote:

Originally Posted by zimi117 (Post 2096803)
Advanced brand. Brake light is not on but pressure does not feel consistant. Pedal will have no good pressure then it will presurize hard causing wheel to lock and skid. It's in the front.

It sounds like you have a booster going bad and it's going to be kinda hard to diagnose. Sometimes the booster will relax internally due to the valve going bad and let the master pushrod go forward slightly and cover the replenishment port in the master. That stops the fluid from returning from the caliper as it expands due to heat. When that happens, the fluid will expand, the pedal gets difficult to push and the caliper will self apply and lock up and or overheat.

The inconsistent part bothers me because that can indicate a bent axle in the rear if you have discs and you've got piston knock back, or a wheelbearing going out. That usually shows up as a very soft pedal that comes back with a couple of pumps.

Do you have someone that can help you bleed the brakes and let me know how much fluid you're getting out of the front and rear if you push the pedal very hard and fast? If you aren't getting good flow to the back, that can mean your combo valve under the master is sticking and will need to be taken apart and cleaned. I've seen that produce very similar symptoms to what you've described.

BeerMan 03-03-2012 11:04 AM

I had the same crap happen on my YJ. Mechanic said bad caliper, replaced it. Then it happened again. Wound up being master cyl.


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