Need brake help

[Angus]

I've got an issue with my 02 Dakota that I can't figure out and hope someone here can help me out. A couple years ago I put new drums and shoes on the rear and rotors and pads on the front, the truck was due and the rear had a little bounce to it which I attributed to a bad drum so I replaced everything. After the brake job the brakes worked great but the little bounce didn't go away. I learned to deal with it until recently when it seems like the bounce is getting a little more noticeable and I've had enough, I need it fixed. This morning I inspected both rear brake assemblies hoping to see something obvious, I saw nothing, shoes and drums look fine, don't know where to look next.
Any thoughts/suggestions are greatly appreciated.

[slowhand]

Going to need more description of the little bounce.
Is it right at the end of your stop? one bounce or repeated?

[Angus]

Repeated, speed doesn't seem to matter, although more noticeable getting off the freeway.

[Mark Brenckle]

Did you bleed them when you replaced the parts? Might have some air in the line.

[slowhand]

Get up To freeway speeds. lightly apply the E-brake see if you feel it. If you do You have a warped brake drum. Easy fix to have it machined true again. If You don't feel it with the e-brake applied then You might have a warped rotor.
I have had many warped rotors and or Drums right out of the box. What brand parts?
 

[slowhand]

Did you bleed them when you replaced the parts? Might have some air in the line.

Air in the brake system will not cause a bounce in the brakes. unless his bounce is a low brake pedal

[Angus]

What brand parts?

O'reilly, which was probably my first mistake, wife was a student at the UW at the time, funds were tight.

[KFhunter]

Could be anything from a bad tire, lost wheel weight, mud, wheel bearings, driveline going out, carrier bearing, transmission output shaft bearing, blown shocks on wavy pavement

I would rotate the rear tire to the front, see if your bounce moves

While tires are still on but in the air, check wheel bearings

Inspect drive shaft, wiggle the u joints

Wiggle the output shaft on your trans

Start with the easy things that don't cost anything




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[KFhunter]

I had a bounce like you described, took wheels off and power washed inside the wheel getting the dirt out, bounce gone

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[slowhand]

Or You can take it to a Mechanic like Myself. They will charge You an hour ($100+) to tell You what's wrong. Then do the repairs Yourself.
 

[slowhand]

What brand parts?

O'reilly, which was probably my first mistake, wife was a student at the UW at the time, funds were tight.

And yes O'reilly is a bottom option for parts quality.

[jackelope]

Are you talking about a pulsation when you apply the brakes?

Vibration while driving?

What do you mean by “bounce?”

[Angus]

Pulsating is probably a better description, I just said bounce because my kid asked me once why the truck always bounces when we slow down.

[KFhunter]

On a side note...

I'm a big fan of EBC brakes

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[slowhand]

I got my money on it being a high quality china brake drum or both. Get the rear drums machined and Your problem should be solved.

[jackelope]

It depends how far you want to go to diagnose it. You can do the e brake thing and that will tell you if it’s a rear drum. You could take them to a machine shop if you want to go that far and have them measure runout. They can be machined true if there is excessive runout. I’m hesitant though because it was there before the new brakes and it’s there after?  It only happens when the brakes are applied?

[jackelope]

You could have a bent axle maybe. If you have jack stands you could lift the rear end off the ground and run it in 2wd and see if there’s any out of true movement of the wheels. If the axle is bent, you’ll see the wobble.

[deerlick]

Just about every orielly brake drums come pre warped. Get them machined

[slowhand]

Just about every orielly brake drums come pre warped. Get them machined

This Man is wise in the ways of the force.

[Angus]

Thanks for the help everyone, replaced drums, problem solved.

[Alchase]

Thanks for the help everyone, replaced drums, problem solved.

Oh the irony, I once had an O'reilly tech tell me that all rotors will pulsate until they wear into the vehicle, 

I handed him back my rotors an left.

 

[slowhand]

Thanks for the help everyone, replaced drums, problem solved.

Awesome sauce