how much of what for 04 diffs and tranfer case THANK'S

 

I can't remember the amount right now but 75W90 is the popular weight of oil. There can be a lot of rules on what should be used due to ratings and such but Mobil 1 synthetic gear oil has worked well for my truck's diff.

Not sure about the transfer case; mine's a 2WD!

 

I use mobile 1 75w-90. as long as its GL-5 rated thats what is needed. and fill to the fill hole. specs call for 1/4" below the fill hole +/- 1/4". so technically you can fill to the bottom of the fill hole..

 

Transfer case 2.5 qts ATF+4 Automatic Transmission Fluid
Fill Plug.....15-25 ft-lbs
Drain Plug.....15-25 ft-lbs

Front axle 9 1/4 AAM 74 oz = 2.31 qt 75W-90 or 75W-110 API GL-5 diff COVER BOLTS 30 ft-lb
Rear axle AAM 11.5 takes 122 oz. = 3.81 qt 75W-90 or 75W-110 API GL-5 diff COVER BOLTS 30 ft-lb

courtesy CF



I used Mobil 1 75w90

 

Don't torque the diff cover bolts to 30 ft-lbs. They can break. Only torque them to 25 ft-lbs.

 

Before you drain the transfer case make sure you can open the fill plug. Lots of people have had a hard time getting the fill plug out cause it's so tight. It's hard to fill from the drain hole
Jay