ford/lincoln 6 speed automatic question

[dkwebb2727]

I have a 2005 navigator with the 6 speed transmission. When I tow my jayco it never shifts into 6th. I think it stays in 5th. The gear selector doesnt give me an option to stay in 5th, only 4th. Should I just l let the transmission find the gear on its own or should I shift down to 4th. Thanks. Ps I tow a 267 bhs jayflight. Dry weight is about 5,400.

[Seann45]

I would just let the transmission pick the gear it wants to be in... NOW if it starts hunting for a gear, shifting up and down continually, then take it out of OD or drop it one notch.

[Brownie]

There should be an "Overdrive Off" button on the end of the gearshift that is designed for towing. It will prevent the transmission from shifting to 6th gear, since towing puts a lot of stress on that small a gear. If you've been depressing the "OD Off" button while towing, it's doing what it's suppose to do. I you haven't been depressing it, then the trani is smarter than all of us. Sounds like it knows what it's doing.