Hello again guys,
Just completed my rear sswap, finally! Question is, I am told not to use synthetic, something about Ford rears not using it. It has a Detroit True Trac. Right now I have 80-90wt Valvoline in there. I have some oil blowing out the vent tube hose which is vacuum diameter and extends about 1 foot up. Also have a super slight rear bearing leak. Am I overfilled? I was told to put 3 qts in. Any help would be much appreciated...Phil.