stretch40

Hey everyone,

iv been trying to find someone on the site with my problem but no luck! if anyone has and input, please.

I have a 91 4runner and for the past month when i brake it will be fine but the the next push and the peddle slips then a clunk from the front????? iv bled the all 4 and the lspv... it brakes goods and everything but this feeling on the peddle and noise is a little scary.. i dont want to the brakes to fail on me.

any help would be great!!! Thanks

Nimyad

My 81 did the exact same thing, scares the s*** out of you but doesn't actually do anything. Mine was the rear brakes though and it was because my shoes were toast

xxxtreme22r

My vote is loose pads or a sticking piston in the caliper.

angrybob

Can you explain in a little more detail? What actually happens with the brake pedal?

How often does this happen? Any witness marks on the front calipers or inside of the wheels? Are both caliper to knuckle mounting bolts still there?

stretch40

ill have to check the rears, but as far as the fronts go its all in good order, but ill have another look on my days off.

angrybob: this happens every day, but not everytime i brake. it dosnt seem to effect my braking power, but i can tell when it is going to happen, feels good then pressed halfway in it will slip maybe an inch, and at the same time it slips i will hear a clunk from the front... but i continue to stop fast?

stretch40

alright, so i pulled the drums off and the pads were fairly low witch was making on of the pistons over extend!!!! there was a drip of oil and the rubber boot was off alittle!!!!!! ahhhh,

i guess the piston over extending was making the clunk??? and having a hard time going back to normal position?

do i have to replace the piston??

angrybob

Makes sense that you still had good brakes since the drum brakes do very little

If there are any witness marks or damage to the piston at all, just go get a new wheel cylinder. They are cheap.

Nimyad

oh ya, i was right...
ya just get a new piston, best to be positive it works when it comes to brakes

stretch40

thanks guys! didnt really want to do the brakes yet, but you gotta do what you gotta do...