30U rear end vent

[p4jim]

Does the 30U have a rear end vent and if so where would it be?   Thanks, Jim

[Old Plymouths]

I remember the '29 having one and if my memory holds true it was on the top of the banjo housing. I put a rubber hose on it and anchored that up to the body above.  I believe all rear ends must have a vent or the foaming pressure of the hypoid fluid will blow out the seals.