Wearing out rear pads over fronts.

[sota]

So i'm finally getting around to solving this problem, hopefully.
I'm ****** rear pads. Brake pedal engagement always feels weak on first press, then a quick pump and I have neck breaking stopping power available. I've bled the system more times than I can count, no effect. I've even used a scan tool capable of actuating the ABS pump to no positive effect. No visible leaks on any of the lines all the way from the master to the calipers. All 4 calipers move freely when I compress and extend the pistons.

Before I just start tossing parts at this thing (a new master cylinder being the first one) does this sound like something someone else has seen/experienced before, and has solved? I thought the standard brake split system exists (brake circuits are crossed to prevent total loss of one axle in case of a circuit failure), but with the ABS pump in the way I suspect that has no bearing any longer? It's just bizarre that it's both front brakes and not a cross brake fault.

eta: digging around some more i'm seeing the possibility that it's the ABS pump itself? god I hope not.

 

[KJowner]

Strange one, normally it's only one wheel that goes like this and a simple calipers fault. I did read about one guy with a KJ who had a problem like this, it went away when he pulled the fuse for the ABS, might be worth a try??

 

[LONGJEEPOWNER]

Waiting to see who has found a fix for this also! My rear breaks wear more than the front brakes and to this day I haven't found out why!

 

[duderz7]

Could be the rubber brake hose swelling internally and not letting rear brakes fully release after warming up. There is a single line that feeds both rear between axle and body.

 

[KJowner]

Just wondering if there are the later model jeeps that use the brakes as a substitute for a locker? If so then it's probably normal???

 

[Jeremy-WI]

Just wondering if there are the later model jeeps that use the brakes as a substitute for a locker? If so then it's probably normal???

My 2006 does this, if one rear wheel slips enough the brake engages. I have only had it happen in snow. If my back end slides sideways in snow it engages a front brake to stop the slide

 

[sota]

all 4 brake hoses are only 6k miles old.
it is an 07 so it has an over-active ABS/ESP/TC system.
and there's 4 hard lines, since it's 4-channel ABS.

I think the bigger picture problem is the lack of front braking initially.

 

[turblediesel]

Caliper pistons up front seized?

I found both my rear calipers were seized and had to be replaced on my first brake job. No towing or wild use or abuse. I can't remember any wear difference front to rear. It was an early brake refresh so I was suprised the calipers were trashed.

 

[sota]

nope. everything's free and moving.
like I said, she'll put you through the windshield on a stop, but you gotta pump the pedal once first.

 

[Ksat]

Might be best to replace the master cylinder. They're cheap enough and not too hard to install.