Mine hasn't arrived yet, so someone correct me if wrong.
Top- 4 high open 40/60 power split front/rear
2nd- 4 high lock 50/50 power split " "
3rd- 4 low lock 50/50 power split 2.64:1reduction
4th- 4 low lock/rear axle differential locked
visit
www.hummer.com and fill out order form for brochure. 40 pages with neat pics. and descriptions. Mine arrived in mail yesterday pretty neat package. Might be collector item someday.
Don