Calculating crawl ratio

[abosely]

What is the formula for calculating crawl ratio? I think it's tire diameter, TC gear ratio, tranny gearing & diff gears ratio. But I can't remember what I do with those numbers to figure it! lol

Will have 36' tires, AA's 4.1 split case TC gears with 10% underdrive, H41 and either 4.11 or 4.56 diff gears. I have to double check the rpm at 55 mph, which is upper end of cruising speed here, but think 4.56 gears will be fine.

Found one. Posting the link here in case somebody else would like to know where it's is.

The Novak Guide to Gearing & Gearing Math for Jeeps

Allen

 

[augirthedude]

Marlin crawler website has some very good info there

 

[opg4759a]

This is one of the best sites I've found, has presets for different transmissions and transfercases and you can copy and compare different configurations.

http://www.grimmjeeper.com/gears.html

 

[SNLC]

4Lo.com :: Final Gear Ratio, Crawl Ratio, Tire Size Calculators

Cheers

 

[abosely]

Thanks guy for the links. If anyone has more post em up please. It will be nice to have several of these links for others, for future reference.

I was feeling kinda silly for asking after I found the Novak site, but with the other links posted I feel better as this can be helpful for someone else down the road.

Allen