Mechanics

DRUMS GRABBING

1997 Chevrolet Truck • V8 2WD Automatic • 60,000 miles

When I use the brakes on my 1997 Chevrolet C2500 350ci 8600gvw truck the rear drums lock up on the truck. Now I have new shoes new springs in the rear as well. Everything is textbook but for some reason the drums are still grabbing and I cannot figure it out. At low speeds stopping the tires will lock up and the drums scream when breaking in my neighborhood. I just replaced both slave cylinders. I drove around for about a week and the breaking was perfect and then it slowly started grabbing again and now they are back to full on grabbing. I am very mechanically minded and can fix just about anything on a truck but this issue has me at a COMPLETE LOSS. Please help
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Daviddillmanjr
May 10, 2011.




Maybe a proportioning valve problem?

Tiny
Fixitmr
May 10, 2011.
I have thought of that but what specifically should I be looking for to see if the proportioning valve is the part that is bad?

Tiny
Daviddillmanjr
May 10, 2011.
Does that have antilock brakes?

Tiny
Fixitmr
May 10, 2011.
It does have ABS

Tiny
Daviddillmanjr
May 11, 2011.
Does it have individual rear wheel sensors? 1 on each rear wheel?
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Tiny
Fixitmr
May 12, 2011.

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