brake vibration

Having trouble with vibration during braking. Drums and rotors are both new. No shaking in pedal or steering when it happens. Whole body vibrates braking from 50+ down to around 40. Any ideas to what it could be?

Its an 02 doublecab.

Thanks!

 

Outer tie rods maybe?

 

Thanks for the response. Both of those are in good shape. I also have a steering clunk I cant figure out. Ball joints are good. Steering rack bushings were replaced today as well. You think if it was related to the front, I'd feel it in the steering or pedal, but I dont. Im completely stumped.

 

Are they oem drums?

 

Even if you have brand new rotors or drums, they can still be off. Solution would be having them turned, which would true them up. I'm not saying that's your problem, just letting you know.

 

That I know of, yes.

I'll have to look into some shops and see how much that would cost.


does it sound like it would be just the drums?

 

Cab and bed mount bushings in good shape?

 

Never thought of this. I'll have to check. I bought the truck right after a frame swap. The frame, lower control arms, leaf springs, shocks, and exhaust were replaced as part of the swap as well. I would IMAGINE that if they were bad, they would have been replaced. But again, I'd have to check.

Its really strange though because its not consistent. I was in the passenger seat today with a mechanic driving. I had him brake at various speeds. The first 3 times he applied the brakes, there wasn't any vibration. But the fourth, fifth and sixth time it did. The first 4 times, brakes were applied at 60-65 mph. The last 2 times the brakes were applied at 55-40 mph.

I would imagine that if it was those bushings it'd be a consistent problem?

 

Definitely could be drums. I replaced with aftermarket and had to take off immediately. Bought oem and had 0 vibes after that. You could take off and take them to get turned if you have 2nd vehicle. Pretty common problem with drums. When they are bad it is a pulsating feeling. Extremely noticeable. Shakes your teeth almost.haha

 

sometimes yes, sometimes no.

What did the mechanic say after the ride along? what were his thoughts?

Has the truck always had the vibration since you purchased it?.

Big treaded tires can cause the same harmonic vibes from the speed you indicate it happening.

 

The mechanic didn't know where it could be coming from. It has done it since I bought it, at first the pedal would pulse. So the rotors had been replaced. Now the pedal doesnt pulse. But the truck still vibrates. He gave the drums a quick look and the pads arent cracked or anything. Tires arent aggressive. Theyre the stock set and are actually a little low on tread. All at 35psi as of last week too.

 

Hard to look at drums and tell if they need to be turned.

 

It's really hard to say for sure, it could be. It's almost a process of elimination. If you aren't feeling anything under braking in your steering wheel or pedal anymore or much, I wouldn't think its the rotors up front. I think I would try having the drums turned.
Side note, Your braking system stopping power is about 75% front 25% rear.

Like I said tho kinda hard to say for sure, specially over the internet.

x2

 

I'll look around for some prices and return when I have an update. Hopefully it won't cost much.

 

It might be a few bucks to check for runout/warpage. If they have to cut them true,,then it will be more.

If this all checks out mechanically sound,,then your still looking at dampening vibration obviously. A recent frame swap. The other side of the coin is that they might have cranked the body mounts and ect down to tight,,and now you feel every little nuance that the suspension/brakes/trans/ect are creating.

 

I had a leaking inner axle seal, got my brake shoes wet and covered in grease inside the drums. Caused a weird brake vibrations. Pull your drums and inspect your shoes