I'm sorry - I got that info from a good source in here. I used standard
gear lube like it calls for. I did look for a plastic vent cap while I was
under there, and I didn't see it either. So. . . . . I was glad to be
using the factory recommendation (At least in this case)
Here is a picture, George. It's a bit difficult to see, but if you look
at the top of the picture, middle (slightly to the left) you can see
the vent partially. This will give you an idea of where to look on
your own truck. There is also a small vent hose going to the vent
itself, which would help in locating it.
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