2006 jeep wrangler 4.0 front brakes? yea it sounds like a gravy question?

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preddysgarage

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she goes through front pads usualy every 3-4K (mail jeep) using low end carquest or walker pads i recently got her a cheao set from advance and wore out in 3 days so i got her the lifetime brakes front autozone from her request and lasted a week noticed the LF was wore slam out but RF wasnt replaced both front calipers and reinstallled new autozone lifetime pads lasted 3 weeks now both are wore down evenly but wore out to fast is this a common problem with the aftermarket brakes front advance or autozone? using correct rotors yes and jeep only has 37K on it i never turn rotors belowm min spec according to alldata also this jeep is right hand drive
 
I would expect excessive wear on the pads simply because it is a mail delivery, and it stops more frequently than the average vehicle. 3-4k seems too frequent but when you think of how many stops have been made...

How are the rears doing? You should have similar replacement schedules (the front do more work than the rear so they shouldn't be as often) but do make sure that the rear brakes are working correctly and that the ratio front to rear is within spec. You could have an issue with the brake proportioning valve.
 
master cylinder check valve bad it should be warranty item. also if it has anti lock brake you could have a problem with the compensator but not likely my guess is a defective Master cylinder.Does it pull to the left? anyway get someone to help you jack the car up put stands under it get the other person to slowly push down on the brake pedal as they are slowly pushing down turn one wheel at a time see if the both stop at the same time if they do then take the wheel in your hand and try to move it from top to bottom up or down if no movement your fine if there is movement most likely a worn inside axle bearing. If that is ok check your rear brakes, if the are gone then you most likely have a bad master cylinder and the front brakes are doing all the work. As well look at the rear axle look for the compensating valve see if it works it may have been knocked out of adjustment causing the rear brakes not to wear at all. So we need to know if it's anti-lock or not that changes things.
 
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