Ok guys read about this one and tell me what to do- So I have an 05 QC/SB/auto 4x4. I take it to the dealer to get the oil changed at 44K, along with a new fuel and air filter, lube, and a change of the rear AAM 1150 fluid. After driving back almost 50 miles home I look at the invoice and see that Bozo the clown also added Limited Slip friction additive to my rear end! Question is..... did it hurt it? Not only that but Bozo took it upon himself to "powerwash" my beloved Cummins! Now all the paint on the lettering on the plastic valve cover is gone. Is there a way to repaint the lettering? I don't want to spend the $$$ on an aftermarket cover. I've been gone a while... its good to be back. Hope everyone had a good Christmas/New Year.