After switing to a CDL transfer case in my 03 Discovery, I am looking at a Detroit locker rear and a Detroit truetrac front. I'm building an expedition type vehicle which has a 2" OME lift and larger than stock but not huge tires. What I'm looking for is for someone to share with me what to expect in terms of performance improvement. They are an expensive upgrade and I'm eager to hear the improvement is dramatic. I've looked online but haven't seen anyone describe the difference on say a scale of 1-10 between Detroit's and stock. Subjective, I know, but would like to get a better sense of people's feelings about them. Thanks.