Depending on the type of terrain a person tends to wheel in I would say that the average wheeler wouldn't need any lower gearing in their t-case than what the D300's 2.61:1 low gear has to offer (jeep 231 is 2.71:1). IF one would need lower gearing why limit oneself to a 2-speed atlas (4.3:1 and 1.0:1), when you can add a 231 doubler and have an 3 usable speed t-case assembly (7.1:1, 2.72 or 2.61:1 and 1.0:1) that one could wheel in everything from high speed deep sand at the beach to technical rock crawling. That way the rig is not too low geared for the high speed stuff and not to highly geared for the low speed stuff. This can be accomplished generously for around $1500 with a rebuild for the D300 and 32-spline outputs for the D300, the 231 doubler kit, cost of a D300 and of course your existing 231 case. Plus this combo is within 1-inch of the stock 231 case in length... <img src="/forums/images/graemlins/kewl.gif" alt="" />

Fred R.