7.3L to 6.7L comparison

I would certainly hope that the 6.7 truck, with about 350 lb-ft more torque and about 200 more hp than the 7.3, would climb the hills effortlessly in high gear with a truck camper! :B

I'm guessing you must have had the ZF 6 speed manual in your '99. The 4R100 auto only has 4 gears.

ZF S5-47 diesel close ratio 5 speed manual gear ratios-
Rev- 4.66
1st- 5.08
2nd- 2.60
3rd- 1.53
4th- 1.00
5th- 0.77

ZF S6-650 6 speed manual gear ratios-
Rev- 5.23
1st- 5.79
2nd- 3.30
3rd- 2.10
4th- 1.31
5th- 1.00
6th- 0.72

E4OD/4R100 4 speed auto gear ratios-
Rev- 2.88
1st- 2.71
2nd- 1.54
3rd- 1.00
4th- 0.71

5R110W Torqshift 5 speed auto gear ratios-
Rev- 2.88
1st- 3.11
2nd- 2.20
3rd- 1.54
4th- 1.09/1.00
5th- 0.71

6R140 Torqshift 6 speed auto gear ratios-
Rev- 3.28
1st- 3.97
2nd- 2.32
3rd- 1.52
4th- 1.15
5th- 0.86
6th- 0.67

1999 7.3 Powerstroke-
500 lb-ft @ 1600 rpm
235 hp @ 2700 rpm

2015 6.7 Powerstroke-
860 lb-ft @ 1600 rpm
440 hp @ 2800 rpm

Amazing how much power they're getting out of the new engines.