2008 F250 with 5.4

Checked the 2008 Ford towing guide? Driver door sticker?

Most likely a 3.73 gear and as for pulling the 5.4 is weak. I wouldn't want to pull more than 10k with a 4x4 crew cab.

Don't bet on the 3.73 unless it came with the factory HD Trailer Tow option.

Google search and you should be able to find how to decode axle based on door sticker.

GCWR will be 16K with the 3.73 axle, 18-18.5K with the 4.10. So approximately 8-10K depending on axle ratio.

Check the official ratings but something on the 6-9k lb (fully loaded weight) is probably quite reasonable.

It won't be a towing monster but not horrible either as long as you don't push too big.

Google says that is 300 HP and 365 lb/ft of torque. Not bad for 2008. Pretty anemic by todays standards, especially for a HD/SD pickup.

Personally, I think anything above about 6000 pounds is going to "feel" heavy. I'd be looking for a V10 if I wanted a gas Ford of that vintage.

Tie/tape a length of string on the drive shaft.

Roll the truck one tire rev. Use the valve stem as the datum.

Count the number of full string wraps, that is the first number of the axle ratio

Fractions of a turn is the rest of the axle ratio

Remove the string

3 whole turns means a 3.xx ratio

3/4 of the remaining is x.73 ratio

Put them together and it would be 3.73 axle ratio

.

I had a 2005 F-250 with the 5.4 and thought it was a dog. It had good payload capacity but lousy performance. Keep trailer under 6,000 pounds.

BIL used to own one. His truck was a 2010 though 4x4 with 5.4 and 3:73 gears I believe. He pulled a 7-8 k travel trailer. He didn’t complain about it as far as I know. It was a good truck, drank some gas but so does any gas towing rig like my 09 6.0 GM. I think they had some issues with the 3 valve heads and cam phasers. Though he did not, but he only had the combo for a few years and sold it, just because he went down to a mid sized truck and was not towing at that point.