Keith, When I bought this coach the PTO gasket to the pump was leaking just like yours. It's a easy fix wash off all that dirt and oil get a new gasket remove the pump (2) bolts pop on the new gasket and bolt her up. You will loose a little bit of trans fluid and also that hydraulic pump is a bit heavy, I used a strap to hold it up. Monaco used a really thin cheap gasket for this, I replaced mine with a power steering gasket for a Detroit Diesel series 60 gasket DDE23516101 which is bit thicker no more leaks.