Just joined.....have questions

Heres ratios for a 540D model, as signified by the D1L40 at the end of the assembly no. 7.41 ratio is used to identify low gear, as there were different low gears available. 7.41 was the lowest available first gear.
NP 540D (D for Dodge)
5-Speed, Single PTO right side,
6-stud (S.A.E.) capacity: 7 pints

Ratios: 1st 7.41:1
2nd 4.05:1
3rd 2.40:1
4th 1.48:1
5th 1.00:1
Reverse 7.85:1
I imagine the rear axle is a Dana 70 with 5:13:1 or lower gears, being this thing was probably meant to crawl at walking speed while young men on summer jobs (when that kind of thing was encouraged, we need more of that now!) slung hay from the ground level up to people who stacked it as it rolled through the field.