so I bought a 2007 F150 supercab 8' box 3 years ago with only 83,000 miles on it. 2 weeks later the Tranny conked out. I have read about many downfalls about this truck, but the tranny was never one of them. Regardless warranty paid for the tranny fix but since I bought the truck and before the tranny issue it would chug to engage the gear around 45 mph.
It only happens in OD and not with tow haul engaged. I have been driving it with this same consistent issue for 3 years now without it getting better or worse. If there is an explanation to it i would love to hear it.

 

Automatic transmissions have gotten better within recent years, but they are still electo-mechanical. It also depends on what the truck did before you bought it. Did they do a lot of towing? Those are the determining factors.

A while back, I had a 2003 Ford Escape that went through 4 -- yes, 4 CD4E transmissions. Granted it wasn't one of Ford's brightest moments putting a junk hodge-podged transmission (same one used in the Mercury Cougar, and the Mercury Mystique (AKA Mercury Mistake!), etc). It was meant for a car not a SUV, even the techs admitted to it.

With that being said, the transmissions in these trucks are a heck of a lot better than say a CD4E, but they aren't infallible to abuse.

 

You have a low grade misfire. Replace the spark plugs.

 

For the heck of it, get your truck scanned. There might be pending codes. Can't hurt.

If there are pending codes, post them, and we'll try to help.