I bought my Ultima through Jireh. Now, I will tell you that I did have a problem with the main shaft bearing/seal, it started leaking oil after about 1K miles of use. They, Ultima, did next day air me a new bearing & seal but I did have to pull the tranny (not an easy task) the day before my wife and I headed out on a 2k mile trip to Yellowstone. What upset me was that they admitted it was a "known" problem....kinda torques a guy off. Anyhow, I changed the main shaft seal bearing & seal and have not had any problems since. I also learned to use Belray fluid in my tranny for 2 reasons: 1, it's great tranny lube and 2: it's red, you know what's leaking (primary vs. tranny).....trust me, it helps.
Overall, good tranny.
PS: You'll have to buy the Dakota Digital speedo recal deal as well.