How often do you or are you suppose to change the tranny and rear diff. fluids? Any good fluids to put back in? I was thinking Lucas. Thats what I have been using in the motor and fuel. I want good stuff, dont wanna half-***. Not worth it to me. My truck is a 03 4x4 dually. Is there anything else I should be checking or changing, other than the basics? This is my first diesel and my first 4x4. So any pointers are a great help.
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