txpath4x4 Posted July 3, 2014 Share Posted July 3, 2014 Hey guys n gals what is the valve thing on the frame rail that goes to your rear brakes? My parents quest had one also it looks like an inline pump Link to comment Share on other sites More sharing options...
Kingman Posted July 3, 2014 Share Posted July 3, 2014 Brake bias valve. It adjusts how much braking power is sent to the rear depending on the load weight. Link to comment Share on other sites More sharing options...
Precise1 Posted July 3, 2014 Share Posted July 3, 2014 I think he is talking about the ABS unit, if it is the item about 3/4 of the way back on the inside of the passenger frame rail. I'm pretty sure only the D21 had the brake bias valve, not the WD21... B Link to comment Share on other sites More sharing options...
txpath4x4 Posted July 3, 2014 Author Share Posted July 3, 2014 ah so that is my abs unit... Link to comment Share on other sites More sharing options...
Mr_Reverse Posted July 8, 2014 Share Posted July 8, 2014 Ya, it is your rear ABS dump valve. The proportioning is built into the master cylinder. The HB uses a load sensing valve in the rear, but the Pathy does not. Link to comment Share on other sites More sharing options...
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