I think there is something you're misreading. If you dont keep the stock transmission/transfer case, then you are going to lose TOD. With any other automatic or manual transmission and transfer case, you are going to be locked into either 2WD or 4WD. Thats it. And the 4WD is 50/50 front to rear power split with no adjustments. TOD lives in the stock transfer case, so a dana or any other case just doesnt have it.