How does an atlas 4.8 transfer case and 4.56 rear gears affect my engine rpms? Just curious I guess.....

Here are some gear calculators to play with.

http://www.rocky-road.com/calculator.html

Are you looking for crawl ratio? We'd need to know what tranny you have too and size of tire. Oh and what you have currently. Feel free to put that stuff in your signature too.

For crawl ratio, just multiply tranny first gear, t-case low, & axle gears. If you have an auto, you can multiply your first gear by 2 to compensate for torque converter.

For instance my setup:
5.72 tranny
3.8 t-case
4.10 axles
= 89:1 crawl ratio.

Are you look at new Atlas's?

For some reason, I thought you were higher than that JD. I'm at 67:1 and I thought you were over double what mine is. I don't know why I thought that, but I did.

Yes i am looking at a new atlas. Mostly just planning how to spend my deployment money next year... I am going to have viper rebuild my trans this fall i think along with some headers and new exhaust.

Get a quote from Kincade Bauer for your Atlas. He saved me lots over ordering from Advance Adapters. His website is www.700r4inaford.com. Tell him J.D. sent ya.

Sweet man thanks for the heads up!