wally Messages: 643 Registered: August 2004 Location: Omaha Nebraska
Karma:
Senior Member
Neil Fonville wrote on Sun, 19 July 2015 15:27
Yes I did swap the lines. Front line on the old moved to Back on new MC.
And vice versa.
What is a Step bore in the MC?
On 7/19/15, 2:54 PM, "Gmclist on behalf of James Hupy"
If your p30 master crosses a Dorman M39309 it is not a step bore. I took one apart. http://www.gmcmhphotos.com/photos/g6798-p-30-master-cylinder-disassembled.html
I wonder why the differential pressure switch is not activating making the brake light come on? Is there some thing in the rear part of the combination valve that is effecting pressure? It shouldn't.