Unbalanced Braking - Second Generation Nissan Xterra Forums (2005+)
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post #1 of 10 (permalink) Old 05-07-2019, 04:02 PM Thread Starter
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Unbalanced Braking

Hi Guys,

I am experiencing an uneven/unbalanced braking when hitting the brakes hardly at higher speeds.

The truck swerve right on a hard brake, and the ABS kicks in for few moments.

Any experience in similar cases? How to approach this?

Thnx
Jad.

Keep revving
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post #2 of 10 (permalink) Old 05-07-2019, 04:22 PM
Don
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Your brakes (likely front) need attention. You have symptoms of brake issues but with out examining them, guessing the cause is somewhat futile and pointless.
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post #3 of 10 (permalink) Old 05-07-2019, 04:34 PM
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Stuck caliper piston, or slide pin most likely

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post #4 of 10 (permalink) Old 05-07-2019, 05:26 PM
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My ‘06 did that with air in the lines after a front caliper replacement and hasty bleed.

Bled all 4 again properly and problem solved.

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post #5 of 10 (permalink) Old 05-07-2019, 11:53 PM
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I've had pull before from an incorrect toe angle and stuck slide pins but never to the point of activating the abs, that sounds like it's locking and the abs is having to release the wheel.


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post #6 of 10 (permalink) Old 05-07-2019, 11:56 PM
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Besides brakes it could be alignment, or uneven tire wear.
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post #7 of 10 (permalink) Old 05-08-2019, 06:55 AM
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You might have a few things going on.

Stuck guide pin and/or caliper piston can make it pull.

ABS makes me suspect if the front wheel bearings too.

Worn out lca bushings will make it pull weird on heavy braking too, especially if they are only bad on one side. This could also explain the abs as the alignment would change significantly during braking.
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post #8 of 10 (permalink) Old 05-08-2019, 02:06 PM Thread Starter
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Thank you guys,

Actually i bled some of the fluid from the front brakes (wanted to check if fluid is reaching the caliber as well). I felt a bit of improvement last night.

Today morning the truck was back to normal. I felt it directly on the first brake that the braking system is balance again.

So most likely there was air in the system it seems. Before i started it today morning, I gave it nice few pumps on the brakes with the engine off. Not sure if that helped.

Seems truck heal over night
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Keep revving
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post #9 of 10 (permalink) Old 05-14-2019, 02:50 PM Thread Starter
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UPDATE:

Keep revving
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post #10 of 10 (permalink) Old 05-14-2019, 02:54 PM Thread Starter
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UPDATE:

The unbalanced braking reappeared after a full brake system bleed, which suggested a bad master cylinder. As it is known, the cylinder feeds pressurized fluid to 2 independent hydraulic loops (for safety purpose). Seems one of the loop was getting bust and not enough pressure build up ( i think in the X the loops are diagonal, front right and rear left brakes on the same loop). Hence the swerve when braking.

Changed the cylinder, performed the required bleeding and everything was back to normal. The brake paddle got harder feel to it now, and won't go all the way (as before).
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