[speedlever]

VTM-4 lock has nothing to do with A/T temp lights. They are separate systems, although sorta related. I think the RL comes with a HD tranny cooler because it needs it, and not just for towing.

If the A/T overheats, the A/T light comes on. If the VTM-4 unit overheats, the VTM-4 indicator blinks.

 

[speedlever]

The primary function of that button is to make the owner or driver feel good about themselves for having a button to push.

I beg to differ with your opinion. It's been my experience that when pushing that button in D1, I have driven right out of what I was stuck in.