rear brakes locking up

[Guest]

I'm having trouble with my rear brakes locking up while trying to stop normally. I have 10 inch stock drums on the rear and Duff's disk conversion up front along with Duff's proportioning valve. I don't run my truck much so I expect that I would get rust. Also, the rear end is light without the hard top. Are these the only contributing factors or do I have to make an adjustment? Should the rear lock up before the front? Any suggestions would be greatly appreciated. Thanks.

 

[JMurray]

I think the front should lock just before the rear. I have a hardtop & my rear will lock up first in a panic stop.
I think it has to do with weight transfer. I am going to put in an adjustable proportioning valve. I am not sure thats the cure though, good luck.
Jerry

 

[Hnrys69]

rear brakes could be dirty. you could have a axel leak causing 1 tire to lock faster than any others. Did you bleed your front brakes enough??

 

[chuck]

will the fronts lock at all? Sounds like the fronts are not working right. Is the bleeder on the top of the capiper? Did you bleed them? Is the line that goes to the front brakes coming from the reservoir nearest the firewall?

 

[SteveL]

pull the fur out of the tread. it helps prevent lockup.

 

[supermottl]

I have 4W discs and one of my rear wheels seems to want to lock up before the rest. I attribute it to the lack of weight in the rear. I have a soft top, and a pre-runner bumper up front (heavy). I hope when I get a similar bumper for the rear this summer that it will even it out a bit

 

[76Broncofromhell]

I have 4 Wheel Discs and mine locks the rear up before the front under heavy braking. It's just the way the weight transfers, I've seen video of mine, it must dive 5 inches or so. Think that's where the rear brakes lock up.

 

[rflud]

What Chuck said.

Also if your Prop valve isn't working right your rear would get to much pressure and lock up early. If you can't fix it with double checking the setup in the front brakes get a Wildwood adjustable prop valve that way you can "dial" in the right pressure for your Eb.

I have one and it works great.