FORD F-150 AXLE RATIO CHOICE
My new trailer (Keystone 26RBS) weighs only 6600 lbs + cargo. I’m about to order a 2021 Ford F-150 equipped as follows: V6 3.5 engine Standard (not Max) Trailer Towing Package. This truck has a 10...
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truck manufacturers have abandoned higher ratio rears such as 4.11 to 3.73.
2020 Silverado's use a 3.42 or a 3.23 because the new 8 speed 10 speed transmissions
have lower 1st, 2nd, and maybe 3rd gears than the old 4 speed transmissions and at least
1st gear lower than the 1st gear in the 6 speed transmissions.
when the 6 speed transmissions came out 1st gear was lower than the 1st gear in the
4 speed auto, and the 6th speed that was a second higher overdrive then found in
the 4 speed.
4spd ------------------1----2----3----4/OD--------------------------------known
6spd-------------1----2----3----4----5/OD----6/OD----------------------known
10spd 1----2----3----4----5----6----7----------8/OD--9/OD--10/OD--guesstimate
towing ability used to be mostly based on engine and rear ratio. those trucks
that had the 4 speed manual where 1st gear was an extra low gear that would
help get a heavy load moving.
todays trucks with 8 to 10 speed transmissions has shifted a good sized
portion of the ability to tow away from the rear ends.
2020 Silverado's use a 3.42 or a 3.23 because the new 8 speed 10 speed transmissions
have lower 1st, 2nd, and maybe 3rd gears than the old 4 speed transmissions and at least
1st gear lower than the 1st gear in the 6 speed transmissions.
when the 6 speed transmissions came out 1st gear was lower than the 1st gear in the
4 speed auto, and the 6th speed that was a second higher overdrive then found in
the 4 speed.
4spd ------------------1----2----3----4/OD--------------------------------known
6spd-------------1----2----3----4----5/OD----6/OD----------------------known
10spd 1----2----3----4----5----6----7----------8/OD--9/OD--10/OD--guesstimate
towing ability used to be mostly based on engine and rear ratio. those trucks
that had the 4 speed manual where 1st gear was an extra low gear that would
help get a heavy load moving.
todays trucks with 8 to 10 speed transmissions has shifted a good sized
portion of the ability to tow away from the rear ends.
