Originally Posted by goldenfalcon
What is the Crawl Ratio with the automatic Transmission?
My axle Ratio = 3.73
It is true, Automatics can get away with a numerically lower crawl ratio? Why?
You can figure the crawl ratio for any vehicle by multiplying the lowest gear of your transmission x the axle ratio x the transfer case ratio.
Your auto trans 1st gear ratio is 2.84
Your transfer case ratio is 2.72
Your rear axle ratio is 3.73
Your crawl ratio is 28.81 (2.84 x 2.72 x 3.73)
An auto transmission has a lot of slip, so yes, even though your actual crawl ratio is 28.81, your effective crawl ratio really is lower because of the slip in the auto transmission.