Quote:
Originally Posted by Dave W
I had to do some research before we bought our current 5er so found that they are not quite the same. Or at least a Ford. A Ford 3/4 T has a 3-1/2" 6200 rated axle tube while a 1 T has a 4" axle tube 7280 rated and a an axle shaft 1/8" larger in diameter. Some of the later 3/4 T trucks (2017 up)have been equipped with a 4"and larger shaft so there is overlap. Also, the 1 T trucks generally have one or more spring leaf for that higher payload rating plus a 4" raising block vs the 2" on the 3/4T - and again, 2017 up, there is some cross mixing. Then there is the Sterling/Dana differential confusion and gear sizing. The F350 gets the higher capacity tires as well, ~3400# vs the ~3700#. But with that said, from the frame up (sprung weight) - identical except for the badges.
GM and Fiat - not a clue but suspect similar
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Gm, is all I can address in this respect.
'19 and prior there is no difference other than the spring pack.
'20 is a different story, the 3500 gets a larger rear ring gear, bigger brakes and different programming to allow full torque rating in first gear.