Question about 1997 Toyota 4Runner

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97 4runner---brakes locking up

97 4runner, 4WD, front disc, rear drum brakes, ABS. Sometimes when starting up I put it into drive and the vehicle will not go until I punch the gas and it breaks loose and I am on my way. Also when I am slowing down to a stop the brakes lock up and stop suddenly. I took a look at the front brakes and noticed that on inside of the passenger side rotor there was scarring as if the pistons on that side were sticking. It has been awhile so I replaced the front calipers and rotors. It did not solve the problem. I have limited automotive knowledge, but understand that there is a proportional valve in the braking system somewhere and it could be not distributing the pressure in the pistons evenly and that could be the problem. I am wondering if this is a possibility and if there is a way to diagnose this. Any help or other ideas will be appreciated. Thank you.

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  • frankmezz Mar 07, 2009

    I have a 98 4-runnet disc in front, drums in rear. It's been to sevrel shops and my problem continues. Rear brakes lockup when parked. Need to jump on gas to break them free. When slowing down breaks grab to quickly. Causes a rough stop. Graet car, had it since it was new hait to get rid of it because of this.........HELP

  • Anonymous Mar 23, 2009

    I have the same problem!!! I am closer to the solution!! It is directly related to the Emergency Brake cable/assembly. When it'z "locked" put it back in park, get underneath the truck and give the cable a good YANK....you'lll see what i mean.

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Your rear hub seals are leaking, which leak grease/hub fluid in to the drums which will make them stick.

Posted on Dec 10, 2010

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