TFL just did that low speed towing test they are now calling the Toaster with a RAM 1500. At the end they got a low oil pressure light. I suspect it was the low viscosity oil being really hot and not making the pressure it normally would. However, they pointed out the lack of a dipstick prevented them for looking at the oil to see what condition it was in. I prefer a dipstick for the trans too just for that reason.