I have a problem with my passenger side rear brake. It seems that it is barely working. I have replaced both the master cylinder and caliper twice. At this point it seems that it is a problem with line pressure getting from the master cylinder to the caliper. When you buy a rebuilt master cylinder from autozone you are required to re-use the proportioning valves. I have done some searching online and cannot find the proportioning valves sold separately anywhere.

I have a Nabco manufactured master cylinder W/O abs. Does anyone know where to buy a proportioning valve for this, or have one to sell?

Thanks,
- Matt

 

I have almost the same problem. I'm pretty sure my Proportioning Valve is defective but Autozone and Advance Auto both don't list this part. Has anyone else had to get one? If so did you have to go through the dealer?

 

this one or a junk yard....http://cgi.ebay.com/ebaymotors/G5-95...item2308e1e8c3

 

Junkyard it is. Thanks much.