Amount/kind of lube in rear differential?

[Jeff August]

Henry, on ours there is also a plug on the front side of the pumkin,
I'm not sure why? We used the top hole to fill and the one just
higher than the axle as the full mark, not sure it was right but when
I asked last summer but I didn't get a clear answer. We used
sinthetic, about 5 gallons. Hopefully someone else can give a clearer
answer,but this is what we did and had no problems so far.
Jeff August
1980FC35RB
Plymouth Wi.
--- In WanderlodgeForum@yahoogroups.com, "Henry Claeys"
wrote:
>
>
> (1) I removed the top plug, from the rear differential, and had to
insert nearly my entire index finger before locating any lube. Am I
correct in assuming that the lube is low? (2) What type lube should
I use to refill? (3) There was a second plug, located lower, which
I assume is the drain plug. Should I drain the lube before adding
more? Thanks. Henry@H... 1979 FC 35, McAllen, Tx.
>