Eaton 13 speed road ranger question.

There is not a vent. I would assume the shift tower would be enough to prevent it from pressurizing itself.

 

There is a breather on the top of the case short housing cover that can get clogged up and it will pressurize the case. Some rebuilders replace them with a 1/4 npt plug but it should be a breather.

 

Well the shift tower has an O-ring that seals the top of the ball cause believe it or not splash oil can and will leak out the top. This same o ring is what gets hard and flat lets the finger raise out of the notch in the shift fork and slip out. So no the shift tower does not serve as a vent. The vent is on the left side of the top. Just inside the row of bolts that hold it on. Any rebuilder that puts a plug there I wouldn’t use again. They may put a plug there to keep trash out during shipping and expect you to use your old one I guess……but they #### sure don’t expect you to leave it

 

There’s a gasket under the shift tower along with 3 balls and 3 springs. The o ring is at the top of the tower. The tower needs disassembled to change it

 

If the vent is plugged it will usually cause the oil to be forced out of the shift tower and it will always leak. That is why some folks think that is the vent. Keep in mind If oil gets out of the tower, water will get in.

 

breather is on top left just above the range selector soliniod. Has rain cap on it. The two pole switch at back right is the reverse light switch. That may be plugged as well because some trucks do not have. The two big 15/16 head bolts on top rear are for the carriage spring support between the frame rails. Again some trucks do not have. The spring is laying across the trans in pic.