Sounds like you had a something stuck in the partitioning valve causing the brakes to not bleed back or something to that matter. I take it you flushed the fluid?


Brake fluid is neglected in almost EVERY truck or car. For a couple of bucks you can save yourself a LOT of heart ache including ABS systems-the whole nine yards. Thanks for the lesson!

 

I can say with confidence that if you boiled the fluid, you wouldn't have had any brakes at all or at least very little. I boiled the fluid on the track in Kershaw SC in August going into turn 1. It wasn't the heat (not directly) because the brakes generate several hundred degrees on their own especially with this heavy truck and those little brakes (my 98 GTI had bigger brakes stock).

I never considered the proportioning valve having an issue. Perhaps rust or crud from not flushing the fluid is the culprit. I plan to do my hoses this week and bleed the brakes at the same time. I hope it solves the problem

 

well.... I changed the hoses and no change. I changed the Master cylinder and the problem changed but didn't go away. After the MC it started pulling to the left so, i changed both calipers. after 2 days in charlotte traffic it seems to be resolved (fingers crossed). BTW: There was no need to take it to the dealer to bleed the ABS. standard bleeding procedures worked fine.

 

if you didnt let any air get into the abs module you dont need the dealer to bleed it, that is only if you get a new unit or let air into it.

 

+1 on that sharps!


Some shops have ABS machines but few and far between because their so expensive. Most of the time dealer is the place to go.