This is between the 6.2L and 7.3L coupled with the 10R140 transmission in comparison to the 6.2L coupled with either the 6R140 or 6R100.

The last four months ive spent three to four days a week towing equipment for a friend's business, using either an F350 6.2L or 7.3L with the 10R140 transmission. Trucks are identical fleet trucks and the loads are skid steers and mini excavators. This is just my personal opinion but I've come to the conclusion its the transmissions (6.2L with 6R140 in previous generation and 6R100 in the current F250 models) that really separates the two gas engines, but its also the 10R140 transmission that brings the two engines together.

Towing with both F350 6.2L and 7.3L with 10R140 ive noticed very little difference in performance between them. I hit the same RPMs climbing the same hills with either of the two gassers and seem to operate both almost the same. Jumping in and out of the two trucks day to day isn't a noticeable difference and doesn't feel like I'm driving a different truck.

Just my opinion from operating experience. The power curve of the 7.3L is definitely more favorable looking on a graph, but seat of the pants with the 10R140 both engines feel very close in operation.

 

I guess I'm not surprised to hear this but at the same time the 7.3 puts down 400ft lb's of torque at 1500 rpm, so there must be some difference. Not sure what the 6.2 puts down at the same rpm.

 

Good info. What gearing do you have on the two trucks?

I’ve never driven a 6.2 F350 with the 10R140. The 6.2 F250 (6R trans) w/3.73 was a far cry from the 7.3 10R140 4.30 geared truck (Tremor) that I was able to drive back to back. It sold me on the 7.3 where it could have been the trans.

 

The updated 6.2L with 430lbft @3800RPM changed the torque curve for the better over the previous version. Ive reached out to a friend who is a Ford tech to see if I can get any literature on the 6.2L power curve that he may have.

Ive noticed I can lug down at a lower RPM in the 7.3L without it feeling sluggish like the 6.2L but that is all at low speed getting the load moving. When traveling both engines seem to pull at the same RPMs in the same gears.

 

Both trucks are 3.73. The 6.2L 10R140 stays in the power better than the 6R140/6R100 models ive driven over the years.

 

When they mated the 6R100 to the 6.2 in '17 it was a vast improvement over the 6.2 with the 6R140. Good to hear the 6.2 with the 10R140 does well.

 

I can’t speak for the 7.3L, but I’d take the 6.2L 10R140 over the 6R140. It seems to always be in the sweet spot. Hope the 10R140 proves as durable.