Good idea .the only reason I am not doing this is because I am not a professional truck driver nor am I a professional diesel technician. Although I can change my own oil and run a grease gun.i figure it doesn't hurt to let the pros. Take a look at it.to make sure I am not missing something. I usually do this every couple of years. Yes I admit my previous comparison was a extreme one. And I ruffled a few fathers out there in the hdt world.But like I said before when you live in a world where money doesn't grow on trees this can be nerve racking.