90halfton
I'm Awesome
Anybody ever seen this style of proportioning valve on these trucks? 90 c1500. Did the gmt800 mc swap and rwal delete few years back and just recently did the little shop rear disc kit. The rear wheels are barely locking up while on jack stands after thorough and proper bleeding. The drums did the same thing but I chalked that up to leaky wheel cylinders and a 30 year old rear rubber hose possibly being collapsed (I changed it out).
Really has me questioning this prop valve. All of the ones I've seen have a port closer to the firewall for the rear proportioning side of the valve body. Little shops instructions mentioned disassembling the rear of the valve, removing the spring, and oring, and reassembling for better rear pressure but this is clearly a different kind of valve I cant even find in the Google. Eric the car guy on youtube even did a piece on modifying the valve in this fashion for a gmt400 disc and mc swap he did.
There's also alot of conflicting information out there about the gmt800 disc/disc mcs not needing a prop valve due to internal design to accommodate the disc/disc setups they came with. And if a person were to essentially modify the rear proportioning section of the valve body wouldn't you essentially just be putting direct line pressure to the rear calipers? And therefore just leaving the valve body as a distribution block?
I'm probably just going to install an adjustable proportioning valve or one intended for disc rears and be done with it. Anybody that has any insight or experience with this I'd appreciate the advice. I've emailed little shop about it but haven't heard back yet so I thought I'd run it by some of you that have wrenched on these for 30+ years
Really has me questioning this prop valve. All of the ones I've seen have a port closer to the firewall for the rear proportioning side of the valve body. Little shops instructions mentioned disassembling the rear of the valve, removing the spring, and oring, and reassembling for better rear pressure but this is clearly a different kind of valve I cant even find in the Google. Eric the car guy on youtube even did a piece on modifying the valve in this fashion for a gmt400 disc and mc swap he did.
There's also alot of conflicting information out there about the gmt800 disc/disc mcs not needing a prop valve due to internal design to accommodate the disc/disc setups they came with. And if a person were to essentially modify the rear proportioning section of the valve body wouldn't you essentially just be putting direct line pressure to the rear calipers? And therefore just leaving the valve body as a distribution block?
I'm probably just going to install an adjustable proportioning valve or one intended for disc rears and be done with it. Anybody that has any insight or experience with this I'd appreciate the advice. I've emailed little shop about it but haven't heard back yet so I thought I'd run it by some of you that have wrenched on these for 30+ years
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