1957 Pontiac/Olds Rear Grease Question?

How much rear end grease and posi additive does a 1957 Pontiac/Olds rear end hold?

Any help would be appreciated!

Thanks to the H.A.M.B. for the space.

Gary

57thru 64 Pontiac/Olds Posi Rear End Parts for Sale

 

I'd say 1 little bottle of additive, and about 2 pints of juice. When in doubt, rtfm.

 

We always used the highly scientific method of filling it until it runs out the bottom of the fill hole. How much is that? Damned if I know. I use one bottle of the GM additive for each lube change. The bottles are pretty small.