SO I pulled the LSPV off thinking that I might rebuild it and be up an running. After taking it apart I realized that there was a bunch of rusty nastiness in the LSPV its self. I cleaned the unit thoroughly and re installed it hoping that I had it all figured it out. I was completely wrong apparently. Still no luck with the rear brakes. Maybe the LSPV was too gunked up to be rebuilt. I am stumped. Anyone have any ideas?