Dennis,
See the quote below from a previous post by Tai Kridge
quote:
Since the ZF installed in a Pantera runs upside down thecasing compartments that were on the top of the housing & are now at the bottom, - and if the dude that is filling the box watching the "Full" indicator hole in the casing, the first lot of oil will fill up only the first casing - compartment and the oil will then flow out the Full indicator hole quite quickly, having not got to the rest of the box....and if the dude dosent know how much oil should go in, he might close it all up with only some of the compartments filled, leaving one with a un-filled box...
Total should be 3.75 quarts, so it's a good second measure to know how much you should be putting in.
Thought for the day - Since the ZF is mounted upside down in the Pantera is that hole on top truly a fill hole or the original drain plug?
Julian