Originally Posted by mark p
Are you sure it is the door bearings where the play is coming from and not the case bearing?
The ball bearing in the trap door is the bearing that holds axial position of the mainshaft, the other end of the mainshaft is supported by needle bearings, which support it radially.
The case bearing does not affect the axial position of the Mainshaft.
All shafts that have their run position set by ball bearings have some axial play in them. I know the service manual says no end play, but that is not realistic. If the shafts had no end play, it would mean the bearing was too tight.