So I was bored and put together a list of crawl ratio differences between the AX15, NV3550 and NSG370.
Below is the crawl ratios for each gear position using 4.88 axle ratio for the AX15 and NV3550 then 4.10 ratio for the NSG370
AX15- 1st, 18.69, 2nd, 11.37, 3rd, 7.02, 4th, 4.88, 5th, 3.86...