Crawl ratios for the '00-'04 Xterra:

M/T: 31-35
A/T: 24-26

Most stock 4x4's run in the mid-30's (higher is better). The Jeep Rubicon runs about 65:1, Wrangler with lower rear-end ratio (higher number) is in the 40's.

With aftermarket 4:1 gears, the Xterra's crawl ratio is basically doubled to 50 for A/T and 65 for M/T.

Take that info for what it's worth. There is a crawl ratio calculator in the "Info" section of the main XOC site.