My son in law bought a new to him Dodge with 20k on the clock. What does he need to know ? One question is what rear Differential and front diff.
What full filter should be ran ?

Edited February 4, 201510 yr by jlwelding

Avoid idleing, if you have to idle enable high idle if its an auto. Run the exhaust brake at all times. As far as filters run fleetguard. Best place to get them is genos.

13+ trucks are pretty BA!

I agree, stick with fleetguard filters. The NanoNet stuff is hard to beat.

Rear axle is an AAM 11.5, front is a AAM 9.25".

Tell him not to stockpile def, it goes bad.