asilverblazer One other thing ,found a rebuilder thru my local Fisher parts store in Evansville Indiana,seemed sharp he said if your truck gets rid of brake fluid every day come back to me Iknow what to do for that. The rebuilder is in Evansville,I am in Illinois about 100 miles away. Anyway that has been my experiance with boosters. Carter's told me to use hydraulic jack oil,book says bendix vacuum cylinder oil,I tried it on rubber cylinder cups didn't hurt the rubber.
