Does a proportioning valves go bad? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

crm318 · 02-14-2013, 06:46 PM

I was bleeding my brakes on my 72 cheyenne the other day and i noticed that the pedal was soft. The rear wheel cylinders barley had any fluid coming out, just a trickle. no fluid seemed to be coming out of the wheel cylinders on the drum side. I was thinking it was the proportioning valve. Do those things ever go bad? I thought it was just a manifold that distibuted fluid. Can they be serviced/cleaned? I was also thinking about replacing master cylinder while im at it. Could that be the culprit?

02-14-2013, 06:46 PM	#1
crm318 Alright Alright Alright Join Date: Mar 2004 Location: Midland, Texas Posts: 1,672	Does a proportioning valves go bad? I was bleeding my brakes on my 72 cheyenne the other day and i noticed that the pedal was soft. The rear wheel cylinders barley had any fluid coming out, just a trickle. no fluid seemed to be coming out of the wheel cylinders on the drum side. I was thinking it was the proportioning valve. Do those things ever go bad? I thought it was just a manifold that distibuted fluid. Can they be serviced/cleaned? I was also thinking about replacing master cylinder while im at it. Could that be the culprit? __________________ 1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies



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