i,ve just bought a spare gear bow for my v6 200.the box is older than my other one. it looks to need a new shift shaft seal and impellor housing.i having problems identfying the part no i need. this box i have bouht has a spring loaded pin in the of of the drive shaft. it also has plastic grates on the water pick ups that can be removed (not cast in to the case as they are now)can any body tell me the part nos i need from this.<br />thanks