Use of trans temp data

Bob,

Love that color.

Anyway, these trans run kinda hot normally, but it seems to be fine. Best we have figured is about 250° as being max temp. I can tell you what I've seen and what others have reported.

I have seen 201° on the gauge just going to the mall in traffic. I have seen around 220° while towing. Others have seen close to 220° as well. Not sure what the max temp is but, like I said, it's been established to be about 250°. I also don't know where the temp sensor is. I assume it's on the hot side of the trans.

I want mine to run cooler while I'm towing, but realistically it just stays in the 210-220° range most of the time and I guess that's ok

http://www.coloradodiesel.org/threads/max-temp-for-6l50-transmission.2801/

Your trans temp will, generally, be about 100 over the outside temp. If you are at highway speeds, or on back country roads, that will be true. If you are in city stop and go traffic a lot, it will get warmer like rockcrawler said. He also lives on Georgia so his is bound to be warmer normally. Mine runs around 180-190, but again it depends on the outside temp.

If you are towing a lot, like a good amount of weight, I would turn on tow/ haul. If you are on flat ground and can get up to say 65+ mph, and aren't going to stop and go a bunch, I would turn tow/ haul off so that the truck will shift in to 6th gear. Tow/ haul limits it to 5th. Going in to 6th will let the trans cool as well. Going through hills and turns where you are below 65 mostly, I would just leave tow/ haul on. It will change the shift points and turn on turbo braking to help you stop when you need to.