Hi Art,
Thanks for your reply.
I actually had thought of that proportioning valve and looked into it a bit. There's a very tiny amount of info in Bentley and Haynes manuals-I think in one of the manuals it is called a Rear Brake Modulator or something. Couldn't really find anything in the archives here either pertaining to it.
When I looked it up online it seems to be only available as an OEM Volvo part which at the cheapest is $330 and various places listed it as no longer available.
My next move is to remove hard line from caliper and check flow from it, after that I figure I'll soak and re-soak fitting of the hard line going into the proportioning valve/modulator to rule it out.
Thanks,
Travis
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