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Unread 06-29-2014, 03:33 PM   #1
Furyguy
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2012 JK Wrangler 
 
Join Date: Aug 2011
Location: Conneautville, Pa
Posts: 60
2 calipers sticking?

I have a 2012 Wrangler sport 6 spd. 47k. On my way home from work today, I noticed that it really seemed like I had a caliper sticking. Gas mileage went down, Jeep won't coast, 60mph in 6th it won't hold speed. When I got home I checked and both the left front and right rear are really hot. Are there any known issues on this? Or could it be something else? Weird that both one front and opposite rear would do this. Its Sunday, so I'll call my dealer in the morning. The REALLY frustrating thing is yesterday on my way to work a caliper stuck on my other car (1989 Supra). I took it off and verified that the piston wouldn't go back in, so I ordered a new caliper and pads for it. Now this happens to my Jeep today!? Any thoughts if it could be something else?


Thanks.

*Edit...I let it cool down a half hour, took it up to my brother-in-laws, and it's not doing it now. I'm going to yank the tires and see what I can see.

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Unread 06-29-2014, 05:04 PM   #2
wb2510
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2008 JK Wrangler 
 
Join Date: Nov 2007
Location: South Central Wisc., Wisconsin
Posts: 182
My 08 JKUX has had both rear calipers lock up. One last year and one about a month ago. Both front calipers are original. 70K miles.
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Unread 06-29-2014, 07:12 PM   #3
Furyguy
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I took the calipers off....the sliders were fine and well lubed, the piston was free and working fine. But, wear the pads sit in, they had a small build up of rust and brake dust at the top and bottom to where the pads were sticking in place. That's the only thing I could find. So wire brushed them and relubed everything and put it back together and it seems to be fine. 47k on the pads and they still look like new thickness, and only a tiny bit of glazing from this episode. I have only driven the Jeep a couple times in the last 2.5 months, so I guess I need to drive it more.
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Unread 06-30-2014, 03:49 PM   #4
wb2510
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Location: South Central Wisc., Wisconsin
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Quote:
Originally Posted by Furyguy
I took the calipers off....the sliders were fine and well lubed, the piston was free and working fine. But, wear the pads sit in, they had a small build up of rust and brake dust at the top and bottom to where the pads were sticking in place. That's the only thing I could find. So wire brushed them and relubed everything and put it back together and it seems to be fine. 47k on the pads and they still look like new thickness, and only a tiny bit of glazing from this episode. I have only driven the Jeep a couple times in the last 2.5 months, so I guess I need to drive it more.
On both of my rear calipers the sliders and pins were totally free and lubed but the caliper piston itself was stuck.
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Unread 06-30-2014, 04:27 PM   #5
jay-h
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Once a caliper starts sticking, it will happen again. If it happens again, jack it up and see if there is drag after turning the engine off. If no drag, then possibly something with the ABS/traction control, if the drag is still there then it sounds like caliper.

Hopefully it's the caliper.
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