How much axle fluid

[01z71]

First off, let me say thanks to Ryan for the link on how to lube the chassis.  Thanks.  Now, I want to change to synthetic fluid front and rear.  How much fluid does each of the axles take.  Also, should I change the fluid in the transfer case (Autotrack) to a synthetic fluid?

[RyanbabZ71]

I dont know about the front axle (80w-90 i believe) but i have changed the rear

 

The rear end already has synthetic (and should be replaced with synthetic when changing)

 

The rear takes (75W-90) 2 quarts plus .25-.5 of a quart

 

I estimated mine at 2.28 qts

 

Transfer case???  Never changed that.  Not to long ago i had the blue fluid added to my truck so it should be good for awhile

 

Hope this helps