which diff fluid and additive?

[68bb]

hello all

For a 489 8 3/4 suregrip rear end assembly what gear oil and additive, as well as how much of the additive should be used. The local autozone has a product called trans-x posi-trac which says on the label is equivalent to chrysler #4318060.

thanks

 

[bOb shingler]

if the label doesn't say just add the whole bottle.

 

[cudaspaz]

Get yourself Mopar chassis volume-9.

I am running synthetic 90 weight gear lube and Mopar friction modifier, whole little bottle.

Never had any issues, actually it hooks rather insanely well.