Not the problem I was expecting to have

Been awhile since I drove a Lincoln, but it should do 50 in first gear, second for sure. Did you give it a chance or just put it in drive and go?

Could the brakes have been dragging?

BTDT then took the advice of the fine people o this forum and bought a new 2014 Ram 2500 SRW turbo diesel.

It sounds like your TV has very tall rear end gears which simply are not the ideal choice. What rear end do you have and what is the payload of your TV?

Very few vehicles can actually tow their rated towing capacity. Typically you run out of payload long before reaching the theoretical "Max Tow Capacity". Your TT will load out at around 7,500# which, while under your tow capacity very likely leaves you with little or no available payload after deducting nearly 1,000# of tongue weight + the 100# of WDH.

Another consideration would be your tires. I would guess that the Lincoln has "P's" which give it a nice ride but are a poor choice for towing a large trailer. LT's would help but I think you are asking a lot of the Lincoln.

So what color is you new truck going to be? Just kidding, keep us posted and good luck!

:B

Weight is not always the issue. The biggie comes when trying to drag that big frontal area down the road. It takes a lot of HP to move it.

I would guess it is a combination of factors. That TT is long, so maybe more wind resistance. That Lincoln is probably more set up for gas mileage and comfort. What gears and motor does it have?

Sounds like something wrong with the Nav to me.