I never said the 5.4 wouldn't pull the trailer. I said the 99 expedition did not seem to be enough truck for the trailer. And I will stand behind that comment because I have done it. The body is too heavy and the brakes are not up to the task. The expedition is a great family car and does everything I ask of it. The 5.4 performs well. I just would not recommend it for tow vehicle. Sure it will do it but, safety wise , I would stick with a 3/4 ton or larger truck with whatever engine of choice. But that is just my honest opinion and I tow at least once a week on hilly terrain.

 

--I never said the 5.4 wouldn't pull the trailer. I said the 99 expedition did not seem to be enough truck for the trailer. And I will stand behind that comment because I have done it. The body is too heavy and the brakes are not up to the task

i took you saying it wasnt enough truck for it as in it didnt have the power to pull it. cant argue on the brakes though. i wouldnt pull 5k lbs in a 1/2 ton without a good set of trailer brakes. or without taking my time and keeping a good distance behind the car in front of me.

ive been going through and reading a lot of the older posts(new member here), and in virtually every thread where a guy says "i have this truck, can i pull this trailer" it generally only takes a few replies before some dumb*** chimes in with this reply "gassers suck, buy a diesel." and it just kind of got me aggravated lol. not everyone wants a diesel and that wasnt even part of their question to start with. theres a ton of reasons to go diesel if you dont have a truck and are looking to buy one. better mpg, durability, resale value, etc. but as far as pure pulling power, a newer 7.5 will eat a stock obs psd alive. they have the same peak torque, hp, same power band AND you dont have to wait on a turbo to spool to make that power. same for the non-turbo 7.3. but thats what also made both of them get about 8-12 mpg too. theres no doubt a psd pulls better than a non turbo 7.3 once the turbo is fully spooled up, but up until that point, the non turbo wins that one too.

 

I have pulled with both turbo 7.3 and non-turbo 7.3
while the non turbo 7.3 IDI was a horse in its day at no point will it pull with a PSD or a turbo 7.3 turbo IDI
A turbocharge 7.3 IDI will pull with a natural asperated 7.3 IDI until turbo spool the the turbo will walk away

 

--A turbocharge 7.3 IDI will pull with a natural asperated 7.3 IDI until turbo spool the the turbo will walk away

oh yeah, theres no doubt about that. once the turbo kicks in any at all its not even close between the non turbo 7.3 and the psd. my family owns a wrecker business and we have pulled with everything from a 400 through the 7.3 psd in our pick up wreckers and roll backs. and the two we had the best luck with as far as pulling out from a stop were the 7.5 and the non turbo 7.3. they just seemed like they got the load moving the easiest. we ran that 7.5 until it had over 350k miles on it and still use it on the farm. thats one of the best engines we've had, i just wish it got better than 7 mpg.

 

phillips91, please try using the "Quote" button on the bottom right. It makes it much easier to keep track of all the replies and who you are talking to.

 

Just curious, what's the tow rating on the Expy with the 3.73s??

 

Per my owners manual for my 99 expedition 4x4
(With heavy duty trailer tow option)
5.4L 17 in tires 3.73 rear axle ratio
Maximum GCWR 13,000 lbs
Maximum trailer weight 7500 lbs

5.4L 16 in tires 3.73 rear axle ratio 4x4
Maximum GCWR 13,500 lbs (13,500 for 4x2)
Maximum trailer weight 7900 lbs (8300 for 4x2)

Maximum frontal area of trailer is 5.6 square meters (60 square feet)