To calculate it, check out 4lo.com (http://www.4lo.com)

For you guys with automatics, find out your first gear and then multiply it by appx. 2 to take into account the TQ converter multiplier.

I also used 600 RPMs as my basis.

With my current setup I have a 108:1 crawl ratio assuuming a 2:1 TQ converter multiplier.

Assuming a 3:1 TQ converter multiplier I have a 163:1 crawl ratio.

So where are you at?