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Ok, I just noticed this, but who knows how long it's been this way. I noticed when I had the radio off and it was quiet that when I let off the gas from highway speeds or a little less, the engine is silent for a few seconds, then I hear it start to idle again...it just struck me as odd, but it seems to be running fine and the RPM's on the tack sit there at about 1k, just no diesel engine noise. anyone notice the same?
I did some hill climbing in 4 low and on the way down a hill the truck barely made a noise. It was kinda wierd but understandable. The gears were working more than the engine was.