Rear Brake issues( Drums )

[shelbyt.67]

Change it, just get a new one. Check rear line for crimp/crush.Check the t-fitting at the rear diffy for clogs, Maybe replace flex line at rear,

 

[2003Xtreme]

All the brake lines at the rear are brand new including that flexible line. lol it has to be that proportioning valve. lol

 

[shelbyt.67]

U change the t-fitting too?

 

[2003Xtreme]

Can you buy a new prop valve? I thought I read on here that you have to get them at dealer or the junkyard.. this true?

 

[shelbyt.67]

Don't see why not. I've never had to buy one. But I've never had a problem finding parts.

 

[shelbyt.67]

Just found some on ebay.

 

[2003Xtreme]

the ones for 100 bucks? SCREW that. lol

 

[shelbyt.67]

Did u replace the T at the rear? If not, check it. If u installed new lines, maybe something got plugged or damaged.

 

[Swims350]

the T is made in the rear flex line.

new prop valves are dealer item or rockauto and they aint cheap, junkyards have them too. I'm trying to get one from a member here and if that doesn't work out I'll be getting a new one.

At least I'm pretty sure the T is made in the rear flex line, maybe not but I thought mine was.

 

[shelbyt.67]

This may help.
http://www.classicperform.com/TechBook/BrakeTroubleshoot.htm
http://www.hotrodders.com/forum/gm-proportioning-valve-wiring-133634.html