High tranny temp when towing well below rated capabilityI have 2009 CK

[txab]

I'd still buy a larger aftermarket cooler and install it. We pull in comparable conditions from time to time and we're not seeing those kinds of temps with larger aftermarket coolers installed.

[Jsdirt]

Yeah, can never have too much cooling, that's for sure. The cooler they run, the longer they live.

[markw8]

I've been towing in tow/haul but shifted into drive not manual. I have to tow that same stretch of road at the end of August and will try it in manual limited to third gear. I really appreciate all of the input. In past years I would guess that abient temps have been in the 70s. At the top of this run is a large parking area for the Steven Pass ski lodge. No matter what my temp reads when I try it this time, I may pull over there and hit the tranny pan with my infrared thermometer just to see how it compares to the dash readout. The only other place I've had a climb in temp is going over Snoqualmie Pass (I-90) where it didn't get quite as hot.

 

 

For comparison you have to take your reading at the spot of the sender. Which might not be in the pan.

 

Mark