Right rear brake locking up when heavy pressure applied to brake pedal/Also electrical issue.

Tiny
DUANE_ARCHER
  • MEMBER
  • 1976 DODGE TRUCK
  • 318,000 MILES
I have 76 Dodge W200 and we all know what happens to non ABS vehicle when one slams on the brakes. I have had some close calls with the rear of my vehicle getting away from me. Now, from what I have read is that either my right rear brake's cylinder is leaking a bit OR working properly and the left rear brake is the suspect culprit. With the cylinders being rather inexpensive should I just go ahead and replace both cylinders or can you think of anything else it could be. I have read that it could be the emergency brake but from what I see on this truck the e brake goes to both rear wheels. Under normal braking conditions the brakes work find--slam on the brakes and the right rear tires smoke agains the asphalt and the left rear does not. Any help is appreciated.
Saturday, September 14th, 2013 AT 4:33 PM

4 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
As far as replacing both wheel cylinders, I would only do the ones that need replaced. Have you had the drums off to check if there are leaks? Also, have you properly cleaned and adjusted the brakes?
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Saturday, September 14th, 2013 AT 5:39 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
One other question. Is the brake drum glazed as well as the brake shoes? Are the shoes good?

Let me know if there are any leaks so I know which direction to point you.

Joe
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Saturday, September 14th, 2013 AT 5:40 PM
Tiny
DUANE_ARCHER
  • MEMBER
  • 10 POSTS
I will jack the truck up soon and let you know. There is no telling what needs replaced, and of course, I hate dealing with drum brakes. I have not noticed much fluid loss in the master cylinder, but perhaps a very small leak can cause an issue. I will look at the things you suggested. I appreciate it.
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Saturday, September 14th, 2013 AT 8:01 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Let me know what you find. A small leak can cause the brakes to lock up. However, I have seen situations where a wheel would lock up when the brake drum is very glazed and the brake shoes are the same way. The best way to fix that is to take a very light cut off the drums (just enough to get rid of the glaze) and sand the brake shoes. However, we will decide what to do after you check them.

I'll look for your post.

Joe
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Saturday, September 14th, 2013 AT 8:03 PM

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