The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 47-59 brakes locking up

nvrdone · 01-25-2023, 11:10 PM

So I got to spend some time on the truck today. After a short test drive I remembered why I didnt really like the brakes. On a hard stop they lock up.
Some time ago I replaced the stock m/c with a corvette didc / disc one with 10# pressure valves in both front & rear lines. Yes, Im still using stock drums front and rear. Tried backing off the rear brakes hoping that would help. No luck.
Then I thought about an adjustable proportioning valve in the rear line to limit the pressure.
Has any one done this and what were the results?
Thanks

01-25-2023, 11:10 PM	#1
nvrdone Registered User Join Date: Dec 2011 Location: Moxee WA Posts: 1,438	brakes locking up So I got to spend some time on the truck today. After a short test drive I remembered why I didnt really like the brakes. On a hard stop they lock up. Some time ago I replaced the stock m/c with a corvette didc / disc one with 10# pressure valves in both front & rear lines. Yes, Im still using stock drums front and rear. Tried backing off the rear brakes hoping that would help. No luck. Then I thought about an adjustable proportioning valve in the rear line to limit the pressure. Has any one done this and what were the results? Thanks __________________ 49 chevy 3100 3 window. 327 / m21 4 spd, 12 bolt w/ 3:55's Bought in 1973 for $235.00. Had it longer than my wife & Kids!!