Proportioning Valve ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Ironhorse** · 11-12-2004, 07:42 PM

Tried to use the search function but it said the word "proportioning" in proportioning valve query was to long.

My question is:
The proportioning valve on my '71 4x4 with factory disc brakes is leaking at the rear of the valve. All the connections seem tight. I have a '71 or '72 two wheel drive that had a working factory disc brake system before I sold the rear axle and gears. Proportioning valve is still mounted to the master cylinder, far as I know it is still good. Has differant casting numbers but appears physically to be the same. Anyone know for sure if it will interchange? Don't want to pull the one off my running 4x4 until I know that I have one to install on it. Any help is much appreciated.

11-12-2004, 07:42 PM	#1
Ironhorse Senior Member Join Date: Jul 2001 Location: Wellington, Ks Posts: 10,294	Proportioning Valve ? Tried to use the search function but it said the word "proportioning" in proportioning valve query was to long. My question is: The proportioning valve on my '71 4x4 with factory disc brakes is leaking at the rear of the valve. All the connections seem tight. I have a '71 or '72 two wheel drive that had a working factory disc brake system before I sold the rear axle and gears. Proportioning valve is still mounted to the master cylinder, far as I know it is still good. Has differant casting numbers but appears physically to be the same. Anyone know for sure if it will interchange? Don't want to pull the one off my running 4x4 until I know that I have one to install on it. Any help is much appreciated. __________________ 1971 Chevy 1/2T 4x4 LWB 350 V-8 Was sm465-now 350TH/np205 Tilt, Tach, Towhooks Original Truck AM/FM Wellington, Ks



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