F150 3.31 gears vs 3.55 gears
I accidentally posted this in the wrong section earlier, but please indulge me in 1 more question. I sort of asked this in another thread, but wanted to devote a thread to this particular question. My...
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Yep... Even with my 3.73's I always lock out 6th gear.. and that's just cruising on the flats..
Up the grades, it likes 4th. Even just some of those gradual inclines, I'll manually shift to 4th.
Since I have the Ecoboost, if you give the engine some beans, the boost goes WAY UP. If you are only chugging along at <2000 rpms, you can be pushing some 10+ psi of boost and not even see any speed increase! Plus, the temps start to rise pretty fast..
Bump it into 4th, and the boost goes down to arouund 5 psi and you actually pick up speed and keep temps in check and actually get better mpg's..
That's why running in 5th is better than 6th when towing. Going the same speed, there is at least a +- 4 psi boost difference running in 6th compared to 5th and temps increase and mpg's drop running in 6th. (while towing... )
I didn't find any of this out until I got an ODB2 plug in and phone app to monitor a ton of sensors that the dash does not even come close to showing you...
Anyway, the OP wants a 5.O V8, so a different beast than my Ecoboost, but I would not want that 5.0 towing my little #7000 TT.. :)
Mitch
Up the grades, it likes 4th. Even just some of those gradual inclines, I'll manually shift to 4th.
Since I have the Ecoboost, if you give the engine some beans, the boost goes WAY UP. If you are only chugging along at <2000 rpms, you can be pushing some 10+ psi of boost and not even see any speed increase! Plus, the temps start to rise pretty fast..
Bump it into 4th, and the boost goes down to arouund 5 psi and you actually pick up speed and keep temps in check and actually get better mpg's..
That's why running in 5th is better than 6th when towing. Going the same speed, there is at least a +- 4 psi boost difference running in 6th compared to 5th and temps increase and mpg's drop running in 6th. (while towing... )
I didn't find any of this out until I got an ODB2 plug in and phone app to monitor a ton of sensors that the dash does not even come close to showing you...
Anyway, the OP wants a 5.O V8, so a different beast than my Ecoboost, but I would not want that 5.0 towing my little #7000 TT.. :)
Mitch
