Multiple questions, but first, some backstory.
We have had several travel trailers in the past, but just recently bought our first toy hauler(bumper pull). We just(last night) got back from out first trip to the dunes, and have some questions. Truck specs in my signature.
Truck+trailer weigh in at 20K Combined(weighed in last night, this is everything full, and 5 adults in the truck, max load). When pulling mountains(we live in california, so there are a lot of mountains between us and coos bay), we cannot cross about 42MPH. Is this normal with a heavy load? Next, when we got stopped in traffic and were doing about 4mph up a hill in a construction zone we got our trannie well into the yellow on the factory gauge. Is this normal? And, we ran essentially the entire trip with no AC to keep the truck cool(when we turn on the AC the truck would get hot!), how do we fix this?
New Trannie pan with fins?
Change out the 3.73 rear end for 4.10?
Drop in a HD4R100 trannie as an upgrade?
Sell the F250 for an F350 Dually of the same year?
Looking for comments, suggestions, etc.