Do you know what your tongue weight and total weight of the trailer will be when loaded? Also what type of brakes are on the trailer. Also with the 5” drop hitch will the truck and trailer be level? In general the Tremor should pull it just fine. Just best to know the details.
The part number for the transmission indicates that it was a new transmission not a reman or rebuilt. Needs to get back to the dealer to sort out what’s going on. But the new transmission does have all the updates.
That’s great that they took care of you. Rare instance of a dealer doing you right. I’m guessing it would be prudent to keep the OE valve in the glove box for such instances if switching to an aftermarket valve and towing heavy.
If you’re going to swap transmissions then put the latest 10R80 updated one back in. Much easier and if in a 4x4 then also much cheaper. The updated 10R80 drives like a totally different truck.
As I understand it the highest level in the pan is when it’s sat the longest ( cold). So if you’re trying to extract the most fluid wouldn’t that be the optimal time to do so?
Double check your paperwork. I had three steps done before they replaced my transmission.
1.Reflash
2.Clean valve body
3. Replaced valve body
4. Replaced transmission
Sounds like fun. Hopefully you don’t have any issues around Graying with the ice storm damage that they had. Especially the back roads and around the river. Quite the mess.