Rear brake shudder

85 Squarebody76 · May 5, 2022

Say I am having a problem with braking on my 1985 GMC 1500. Power disc front and drum in rear. When I apply moderate braking the back end has a tendency to shudder and start hopping. I have replaced the brake shoes and turned both rear drums. Had the all the tires balanced. If I brake gently there is no problem but moderate or hard braking causes the issue to happen. I pulled the drums off and made sure all is dry and clean and adjusted correctly. Has anyone had a similar problem ?

Vbb199 · May 5, 2022

Back the star wheel off a tad, they could be a touch too close to the drum and grabbing too hard.

mtnmankev · May 5, 2022

And the short brake shoe goes towards the front and the long shoe to the rear ?

85 Squarebody76 · May 5, 2022

Vbb199 said:
Back the star wheel off a tad, they could be a touch too close to the drum and grabbing too hard.

I will give that a try... Thanks for your

85 Squarebody76 · May 5, 2022

mtnmankev said:
And the short brake shoe goes towards the front and the long shoe to the rear ?

Yes the short in front and the long in rear... The problem started with the factory shoes. I thought maby new shoes and turning the drums would correct the prob... I am the second owner and it has 55,200 original miles on it...Thanks

GMCSHOPTRUCK · Jun 26, 2022

Did you resolve the issue with rear brakes? I'm having the same issue, was thinking drums could be warped!?

85 Squarebody76 · Jul 7, 2022

GMCSHOPTRUCK said:
Did you resolve the issue with rear brakes? I'm having the same issue, was thinking drums could be warped!?

Have not found the problem yet. New brake shoes and both drums turned. If I have weight in the bed it brakes smooth as butter but when empty it starts jumping

fast 99 · Jul 7, 2022

shocks or other suspension bind?

GMCSHOPTRUCK · Jul 12, 2022

My truck also starts jumping when hard braking, thanks for the reply

BKING33 · Jul 13, 2022

Double check that your e-brake cables are releasing properly. I had 2 different trucks that would have brake problems after using e-brake.

IdahoJOAT · Jul 13, 2022

Yeah I'm curious if it's a leaf spring issue. When under load it doesn't do it... so I'm wondering if a spring bushing is bad. When the rear brakes, the one side comes forward, throwing everything out of alignment in the rear and causing hop. I would think the bushing would have to be pretty bad though to cause what you're describing. Interesting.

Rear brake shudder

85 Squarebody76

Full Access Member

Vbb199

B-rate Hillbilly Customs

mtnmankev

Full Access Member

85 Squarebody76

Full Access Member

85 Squarebody76

Full Access Member

GMCSHOPTRUCK

Junior Member

85 Squarebody76

Full Access Member

fast 99

Full Access Member

GMCSHOPTRUCK

Junior Member

BKING33

Full Access Member

IdahoJOAT

Member

Similar threads

Latest posts

Forum statistics