porters

After trips to Moab it became clear that the stock gearing in my Sahara was a bit high for rock crawling, however, the stock gearing was great for general trails & sand.

After some research, I see recommendations that a final crawl ration for rocks of around 100:1 for manual transmissions, and something around 75:1 for automatic transitions.

My 2008 Sahara currently has a crawl ratio of about 28:1. As I already stated, great for trails & sand, but not great on the rocks.

If I added a Rubicrawler under-drive to the Sahara along with 5.13 gears, I get some real advantages of having multiple selectable ratios. With the Rubicrawler and 5.13 gears I new get a 39:1 ratio for trails, and a 107:1 for rocks. While that sounds nice, for an Auto the trail and rock ratios are looking a little low to me. I mean 107:1 with an auto trans seems way too low.

So the question I have is, what advice you all have? Is 107:1 too low for rocks with an auto trans?