3.73 DRW axle gear oil question

[the_owl]

Im changing the gear oil out in my DRW rear end.
the axle code shows 61 (3.73 non limited slip).
the guy at NAPA said I needed 75w140 synthetic and 7 pints of it.
He also said the additive isnt needed (or already added) in the oil.

So before I start, will I need 7 pints and is the synthetic 75w140 the proper gear oil for a NON LS rear end?

thanks
A

[460+]

Its the same oil you just dont have to add the friction modifier because you dont have a LS. The modifier keeps the LS from chattering.