Differential Fluid Change - How much to buy?

[THanley]

I am going to change the differential fluid in the front and rear axles of my 2003 2500 4x4. I have the 11. 5" rear axle with limited slip. I know the proper fill levels and that full synthetic oil must be used and with no friction modifiers are required, but how much do I need?



How much fluid does the front differential require?

How much fluid does the 11. 5" rear differential require?

 

[rbattelle]

Using the stock covers, my front axle took 3 quarts, rear took 4. Specification is 4. 75 pints front and 7. 65 pints rear. I filled until it to the bottom of the fill hole in front, and just stopped at 4 quarts rear (wasn't quite to the bottom of the fill hole).



I recommend just buying a case of 12 quarts. Use the leftovers on the next change.

 

[Bertram65]

Same here 3 in the front 4 in the rear.