I have a 1985 318 with over 1500 hr. on it . It has a wining (sound )noise coming from the back ,it is not a engine noise . Slow or fast the sound is the same. Forward or backward the sound is the same . The hydro fluid is at the right level . There is a oil leak coming from were the two half's of the main case are put together. So I will haft to split the case apart to put in a new gasket.
What else do I need to look out for ???????