There is a little ball in the rear main cap that functions as a check valve. If it gets stuck it will cause a leak. The 38 shop manual describes how to free it from the outside using a rod and a hammer.




1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!