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jacobs · 02-02-2007, 05:42 PM

Are you using your old 70 master cylinder? If so, I think you need to change to 71-72 master cylinder and booster. I battled with a similar problem and finally purchased a 71 booster and master cylinder...works GREAT now.

02-02-2007, 05:42 PM	#9
jacobs Registered User Join Date: Sep 2005 Location: 9000' Mountain Man Posts: 326	Re: proportionong valve help please Are you using your old 70 master cylinder? If so, I think you need to change to 71-72 master cylinder and booster. I battled with a similar problem and finally purchased a 71 booster and master cylinder...works GREAT now.