differential fluid?

[05singlecabHEMI]

never changed it so really just wanted to know what the proper fluid was?
was reading Sullivan's sticky note on this and said 75W-140 synthetic. i tow every now and then but never a lot of lbs. just wanted to make sure this was the right fluid for the rear end. and how many quarts is it to fill the rear end?

Also what brands have yall used?
Any other input is appreciated

Thanks
-Nick

 

[OlDirtyJohn]

 

[05singlecabHEMI]

so 4L of 75W90. and just the oil you buy, no additives or anything.

thank you very much John!

 

[RubberFrog]

2 qts and the additive.

2500 10.5" = 75w90

1500 9.25" = 75w 140

 

[sullivan]

so 4L of 75W90. and just the oil you buy, no additives or anything.

thank you very much John!

Hey bud, if You have the LSD make sure to get the additive.

Oh an I bet you wont use but 2.5 quarts or so, just fill it just below the hole and return the unopened bottles.