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1999 K2500 rear brake locking up

EIB8400

EIB8400

1/2 ton status
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Jan 11, 2009
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Location
Delaware, Ohio
Usually only does it when it is cold and wet outside or if the truck has been sitting for a while. When I try drive out of my driveway, my rear brakes lock up (feels like it's only the driver side) by just slightly tapping on the brake pedal. It's only the rear brakes, and I can be going anywhere from 2mph to 10mph and the truck just stops on a dime and feels like the axle is going to rip out of the truck. This will last about 3 blocks. It will also do it at random times while out plowing snow and may last a few minutes which sucks when the brakes grab so hard. I've checked everything and even had a shop put new all new drums, shoes and wheel cylinders on it last winter. I've taken it back a couple of times and they can't find anything wrong with it. I've seen other people with the same problem but, can't find where anyone found the actual problem.
 
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That issue is common to a bad/leaking wheel cylinder, or even wear on the shoes.
Time to put it on jack stands and look for yourself
 
Maybe replace the brake hose to the axle. also may be brake pad contamination.
 
76zimmer said:
Maybe replace the brake hose to the axle. also may be brake pad contamination.
Click to expand...
The drums and shoes are new (last year) and have been inspected a couple of times. This has been an issue since last winter. I guess changing the lines is the next step.
 
Bent77 said:
That issue is common to a bad/leaking wheel cylinder, or even wear on the shoes.
Time to put it on jack stands and look for yourself
Click to expand...
It's all new stuff installed last year. I've taken it apart myself and didn't see anything that stood out as the problem.
 
You probably would have mentioned it, but do you feel anything through the steering?

I dealt with a single rear wheel locking up for quite awhile, only to eventually figure out the fronts weren't doing any work.

In my case it was dependent on how much traction I had. Lots of traction (dry pavement) and easy on the brakes, it would stop normally. Progressively harder braking with good traction would try to pull the front end, and I'd have to compensate with steering. The harder and faster I tried to stop, the more aggressive I had to be with the steering. With poor traction (basically anything but dry pavement) even moderate braking would lock the tire up. But since the locked tire was providing very little drag, it wasn't felt in the steering.

I rarely drive on dry pavement, so only after seeing the bad brake pads up front (well, one fell off, thats what I saw first) did I realize what had been going on.
 
dyeager535 said:
You probably would have mentioned it, but do you feel anything through the steering?

I dealt with a single rear wheel locking up for quite awhile, only to eventually figure out the fronts weren't doing any work.

In my case it was dependent on how much traction I had. Lots of traction (dry pavement) and easy on the brakes, it would stop normally. Progressively harder braking with good traction would try to pull the front end, and I'd have to compensate with steering. The harder and faster I tried to stop, the more aggressive I had to be with the steering. With poor traction (basically anything but dry pavement) even moderate braking would lock the tire up. But since the locked tire was providing very little drag, it wasn't felt in the steering.

I rarely drive on dry pavement, so only after seeing the bad brake pads up front (well, one fell off, thats what I saw first) did I realize what had been going on.
Click to expand...
The fronts seem to be doing most of the work. I'm on my second set of pads in the last 2 years.
 
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