towing with 99 F-250 SD

I Leave it on, unless it can't seem to stay in a gear. They didn't mention turning it off in the manual, so I'll assume they knew what they were doing.

I have a V10 and tow a 14,000lb 5th wheel in OD all of the time. You might have to take it out of Cruise when going over an overpass to keep it from down shifting, or, just put it in 3rd when pulling even a slight grade. The 5.4L doesn't put out much torque.

I have a '99 F350, and it's towed a 20,000lb combination trailer with Bobcat/Tractor since it was new. I always left the overdrive on. Around

Spdloader

Thanks for all the input. Jim

It does surprisingly well.

Spdloader

I guess that is the problem with these new pickups with powerful turbo diesels. They have the power to pull anything so people seem to be using these truck for duties that used to be performed by dump trucks. What will happen when your 20,000lb trailer gets out of control? Your 7000lb F350 doesn't have a prayer. Hopefully you don't kill anyone in the process as you could be convicted of manslaughter.

Rob, your logic is sound,

However, the average tractor-trailer combination is much worse in weight ratios. The average road tractor is around 16,000 lbs, and by ratio pulls well over it's own weight, triple in some cases.

The class "A" license is for drivers trained to pull loads starting at

I have a class "A", and do pull my heaviest equipment with a dump truck, and the ratio is about the same.

Trailers do get out of control, and accidents do occur. That's why there are guidelines to help keep these at a minimum.

My F350 is a dually, and is equipped with an electric trailer brake controller, and a gooseneck hitch. My equipment trailer is equipped with electric trailer brakes. I am as safe as I can be, and am within the towing limits made by the manufacturer.

My description of the weight I pull with my dually was a generalization, specifically, it is 21,246 lbs, unless the equipment is muddy, and by combination, I mean the weight of the tow vehicle is included too. The transmission is responsible for all of the weight either on top of it or behind it.

Spdloader

That is good to here. "Most" of the people around here doing that do not seem to be as safe. Thanks for the comprehensive response.

You sound like you are probably a

The manual says leave it in.

It couldn't possibly be that your tranny went out because you were over loading it by 30% now could it....

If you are towing a trailer weighing 21000 lbs you are exceeding the tow limit recommended by Ford by at least 7300 lbs (I just looked it up, the max rating for the 99 F350 is 13,800 )

I am suprised that his tranny lasted 85,000 miles.

Ralph,

I'll respond here to all your replies. Instead of telling you to read my posts again, I'll put it simply for you.

My truck weighs 8,102lbs

My loaded trailer weighs 13,144lbs

My combination load is 21,246lbs

Now, according to the information you posted, I'm not only under the towing limit, but I've got room for a couple more fat guys and a cooler full of Mt. Dew.

I towed with the overdrive on until the transmission went bad. Just like the manual said.

I didn't blame the failure on the overdrive, I said towing with the overdrive turned off helps to slow the loaded vehicle when driving around town.

I don't care if the manual says leave it turned on, I towed with it that way and it didn't work as well, and failed prematurely, whatever the reason.

My transmission temperature gauge says the trans is cooler when towing with the overdrive off. Heat kills transmissions. It was a very expensive lesson.

You should do whatever is best for you, your truck, and the load you pull, don't mind me..........

Spdloader