I have been using my f350 dually more and more lately and it seems that the truck is having a problem. It has the 7.3 psd with a 6 speed manual transmission. Anyway, it shifts fine but when I start from a complete stop it makes a grinding noise. Right when I release the clutch it makes this noise. My mechanic said it was normal (months ago) but a buddy said that it was not. Time to get a new mechanic. All of the other gears are fine but it does the same thing when I start in 2nd, again only from a complete stop. Everyone says the 7.3 was strong and starting with even my little 2500 pound lawn care trailer it seems sluggish starting in 1st. I often use Low but I shouldnt have to with such a small load. I am thinking this may be a problem with the pressure plate but have no idea whatsoever. Any help is appreciated.