I was changing my oil and I realized that I may need to also do or have regular maitenance. What do I need to go to my 4x4 and at what mileage. My friend said that I may need to change the fluid in the diff's and the transfer case.

Let me know and if you have instructions or a link to some that would help?

Thanks

 

Just check your maintenance manual. I don't recall that you really need to change your differential oil. You could do it as a precaution around the 100M mile mark. The only exception might be if you have a limited slip differential. Sometimes the modifiers wear out and need to be replentished.

 

I do have a limited slip Dif.