Break Surging question

[Andrewsreef]

I have 10k on my brakes since my old mechanic did them. They used Toyota parts which involved new pads, turning the rotors, brake fluid flush and the like. I am starting to get the wobble feeling back when applying the brakes at slow speed (like it did when I had them done the first time). I am not a big fan of turning rotors but the old mechanic insistied it was ok so I did it.

I have no squeel and the brakes work very well. I would think I would get 20-30k out of brakes on this truck but I do drive in a lot of traffic so maybe not. On the banana scale, is this a difficult one or should I bring it back to the old mechanic?

Thanks

Andrew

 

[Andrewsreef]

Sometimes I am an idot. I mean Brakes not Breaks.

Sorry about that.

 

[dd113]

Check the ft wheel bearings first

 

[landtoy80]

I am an idot too as I didn't notice

I would get new rotors. Its not hard to replace the rotors if you have the FSM and tools.

 

[robbie]

You might want to do a quick check on a couple of thing first. On a flat surface jack up the front axle then the rear. With one axle in the air and the t-case in netural. spin the tire and listen to the wheel as it turns. If you get the rythumic sound of one part of the rotor hitting the pad you have found the problem, warped rotors. If not you have a problem some where else. Was it the front rotors that were turned or the rear rotors? If the front rotors need replaced then you have to remove the hubs and unbolt the rotor from the hub. You then need to put it back together and adjust the front wheel bearing. If it is the rear rotors (yes they can contribute to this type of problem), they are easy with jsut removeing the wheel and rear caliper and sliding the rotor off. Install is reverse. If you replace the rotors it is always reccommended to replace the pads at the same time. If the rotors are truly flat then you may get away with keeping the same pads, but I would not. You may also have sticking caliper pistons, you may need to check this out, if the slide in the back are not sliding properly this can also create slight surging as you call it. this is why suggest you jack the axles up to find out if you have a problem or not with warped rotors. The best way is to use a dial indiacor to see run out. I believe the book suggest no more than .005 run out, later robbie

 

[Andrewsreef]

Thank you for the detailed response.

Andrew

 

[landtoy80]

You need to measure the thickness of the rotor. When I went to get mine turned they were too thin to turn. Maybe the guy turned the rotors when they should of been replaced.

 

[IdahoDoug]

Andrew,

A bit (OK, a lot) more information is appropriate to help us. How many miles on the rotors? Is your truck lifted? How many miles on the truck? Any history of maintenance on the brakes - fluid, calipers, etc

DougM

 

[Andrewsreef]

I am not sure if the prior owner replaced the rotors. My mechanic said they speced out ok to be turned and that was about 10k ago. They replaced the pads turned the rotors and changed the brake fluid. The brakes felt great when they were done. It still stops very good and no noise. Just starting to get the "out of round" feeling when coming to a complete stop. It drives totally smooth at the same low speed without the brakes on so it must be warpage of the rotors??

My old mechanic (I do not go to anymore) who I called about this said it was proably due to me hitting some water or something and warping them. No warranty on the parts or labor after 6k.

I am proably going to drive it for a while and see how they due. If it is still a problem, I will replace the rotors and pads myself this time.

Thanks for the help.

Andrew

 

[Andrewsreef]

Sorry, the truck is totally stock with no known modifications except the prior owners great ability to not properly maintian the truck.

Thanks

Andrew