Just wondering what the whine sound is on the Allison tranny when the temp reaches around 230 deg. It happens in 3rd and 4th and goes away in OD. The sound goes away once the temp drops back below 220 or 230 deg. It also seems to cool down and run closer to 200 degrees after the warm-up. Prior to this warm-up it generally runs between 200 and 210 deg.
My Dad's and mine both do this and always have. Pondered this again after towing through the Smokey Mountains this past week w/ outside temps in the upper 90's! YUCK!!! Must be that global warming thing that happens every 12 months or so!!! :-)
2002 2500HD w/ the 8.1L and AllisonKevin