Jim, the F150 is an exceptional truck and more than capable of hauling the Safari. The advice above is good especially the tranny cooling. Only wishing I had the power of the 5.4
, I can pass along a few things that have made things easier towing with my F150:
- Consider a lower gear (4.10 or so) in the differential if your f-150 does not already have one. I run 4.30 Ford Racing gears.
- Use Redline lubricants exclusively and change often, especially in the transmission - your tranny will take the brunt of uphill towing
- Add Water Wetter to the cooling system for an extra margin of protection
- A limited slip differential, if you do not already have one, significantly improves traction and control. I added a Ford Racing Traction Lock with the new gears.
F150Online has a forum dedicated to towing with the F150 that you may find intersting: F150online Forums .
There is a lot of experience there on shifting when towing with the F150 auto tranny.
And if you still feel an urge to fly up the hills with the big diesels, visit Troyer Performance
. Mike can send you things like chips, intake, electric fans and underdrive pulleys etc that will add 60-80hp and similar torque gains without affecting the reliability of the 5.4.