360 wrote:
Only reason you might need a deeper rear-end is to boost the ultimate towing capability but the discussion presumes he isn't over the tow rating and it is about drive-ability.
Good points.
Looking at fleet Fords F150 3.5 EB super cab 2019 towing specs starts out at 10700 lbs with the 3.15 gears....3.31 gears same 10700 lbs.....3.55 gears at 12000 lbs....and 3.73 drops back to 11700 lbs. Not that big of a jump like the old 4 speed trannies.
'course we don't know all the different equipment package goes with each tow rating but 3.15/3.31 will work for up to 10700 lbs says Ford specs.
If I was the OP and wanted the F150 as a daily driver and to pull a trailer I would look at the 3.5 Ecoboost engine. Some are getting great mpg on their daily commute and that 470 ft lbs torque hard to beat.