I have the 6 speed, not sure if that is what the NV4500 is but mine has 4 times in 3,000 miles. Not sure if I had the clutch in all the way tho. When it did it it was cold,ambient temp about 20 degrees F. I also may of been shifting a little to fast for conditions. I try to be carefull on my first two shifts in cold weather now. I get the feeling that is a shift that takes a little time and getting used to. I am interested in other peoples replies.
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2001 2500 tow, camper, SWB, ETH, Bright white.