Like the long title says, who has removed the weight proportioning valve for the rear brakes? I read the tsb and it says I am only supposed to do this if I run above 75% of gvw. My truck with me in it weighs 7200lbs and the gvw is 8800lbs so I think I meet the criteria.

The reason I am asking is the previous owner of my truck decided to remove the arm and rod on the valve when he lifted it. I was wondering why my front brakes were wearing very fast. I am looking for a good safe way to make my rear brakes work again, but I don't need my tires locking up all the time in the rain.

Just looking for some input.

Thank you,

Paul

 

the arm fell off mine. i got a new one and i couldent tell the diffrence. try adjusting your rear brakes so you can just feel them start dragging. i also see alot of people upgrading to 1 ton gm rear brake cylinders. but im not sure what they do

 

I did use a longer rod on mine, so it senses more weight than there actually is- combined with properly adjusted rear brakes this made a big improvement.
You could try to rotate the shaft where the arm was with vise grips, and fix it in the "loaded" position and do a test drive. (I recommend doing stuff like this under controlled conditions, no other traffic etc!)

The 1 to cylinders offer a bigger surface and therefore more force on the rear shoes at the same pressure.
All 2nd gens AFAIK are equipped with at least RWALB, meaning that they will not lock up in the rear if the RWALB system works correctly.

Just my 2c

AlpineRAM

 

I'm gonna be eliminating mine soon. Haven't looked close but it looks like I need to fab a section of brake line to connect the two ends that go into the proportioning valve. Gonna remove everything all together. Don't really see the point in it, since a lot of trucks came without the valve all together.

 

i have the GM1 ton cylinders in both trucks and I have removed the rod and tied up the arm on the load sensors due to the lifts on the trucks. If you stop hard in the rain the back tires will lock up. Other wise it stops well. (with the help of hawk sever duty pads up front) the rear ABS has never worked on either truck since new, and has never worked on anyones truck ive asked about it.