Quick search suggests that the consensus preference is 2 qts of Redline 75W90 synthetic.
However, is this oil the appropriate choice for a VLSD???
I was under the impression that this oil is best suited to open diffs -- is this incorrect? I believe there is a variant without friction modifier additives -- would that be better?
Can someone with a good working knowledge of VLSD's confirm that Redline 75W90 (or a variant or another oil entirely) is the correct choice?
Several threads raise these questions, but don't seem to arrive at a clear answer, at least to me...
Also, any difference in the diff for the 7AT vs 6MT -- mine is the auto.
Plan to order needed fluids and gaskets as noted here within the next day or two...
Thanks in advance!
EDIT: Okay, further searching suggests that the regular Redline gear oil is preferred and that the diff itself is actually sealed (?).
Other suggested alternatives I've found include:
Lubro Moly Gear Oil Syn 75w-90 GL-5 Diff
Richmond Gear Oil Syn 75w-140 GL-6 Diff
Shell Spirax synthetic 75W90 gear oil.
Curiously, NONE of those are the same weight as the factory oil?
Huh?
Er... help?