A Dual Ultimate Crawler is the combining of both a dual transfer case and a 4.70:1 low range gear set. Such a set up in a mini truck with a 3.93 first transmission gear and a 5.29:1 ring and pinion ratio, will yield an Ultimate crawl ratio of 223:1 in first gear low range. Through our experience, we consider a crawl ratio of apprx. 220:1 to be an absolutely ideal speed for any trail circumstance. Wanna-Be Dual Ultimate Crawler This is when someone combines a dual transfer case setup with a 4.00:1 low range gear set. A typical reduction while using 5.29:1 r'n'p then becomes 190:1. A Lower crawl ratio is desired. Dual Ultimate Overkill Crawler This is when one combines a dual case with 2-4.70:1 low range gear sets. A typical low range first gear ratio while using 5.29:1 then becomes 459:1. A ratio this low might only be needed in extremely rare, and possibly never to be found circumstances. Wanna-Be Dual Ultimate Overkill Crawler This is when someone combines a dual transfer case setup with 2-4.00:1 low range gear sets. A typical reduction while using 5.29:1 r'n'p then becomes 333:1. Super low, but not nearly as impressive as a genuine Dual Ultimate Overkill Crawler. See a table of common crawl ratios How do I determine what ratios I have? Toyota 4WD First Gear Transmission Ratios Crawl Ratio Calculator Determine your Actual Vehicle Speed vs. Gear Ratios and Tire Sizes Close this window