UPDATE:
A Jeep Rep from Mississippi did come down Tuesday and could not "duplicate the problem" and I went up there Wednesday and of course it did not shudder for me either, until I left to go home!
He started talkin about talking with the engineers and get back with me in a week or two and they will look into what "may be" causing it to shudder. I asked him if it was air in the fuel and he LAUGHED!! He asked me what I wanted to happen and I told him I was tired of dealing with all this BS and wanted to get out from under my car. He then slammed his notebook shut and told me to take him back to the shop and that he came all the way from Mississippi for me to tell him that. I told him that I had allready told the SM that I didn't think he should come but "it was what DC wanted to do". The tech then called customer service and put diesel back in the jeep

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I went home and called DCX. They put me on hold and then returned to say that the SM told them that they have "never been able to reproduce the problem" which is a huge LIE! Then I asked to speak to a supervisor and then after a lengthy conversation of them telling me that they will do nothing to help me, and I mean NOTHING, and for me to refer to my blue and white book, she then hung up on me. I called back to them after speaking with the SM at the dealership about the "never reproducing the problem" which he said he NEVER told DC that, and then DC hung up on me AGAIN!!
Today, while talking to TxDot about the Lemon Law and finding out that since I have 50k miles on my jeep, it will be no help to me getting it bought back, I mentioned that I had talked to the SM at the dealership in Minnesota, and he asked me why would I be calling Minnesota. I told him that I purchased the jeep from a dealership up there and they shipped it down here to me. He then told me that I have to get Minnesota's Attorney General's office involved.
I called Minnesota and they have a longer time frame on their Lemon Law (TX-2 yrs/24k miles, MN 3 years) and they told me to fax in a complaint form and all my reciepts from all the work done on it (which I HAVE) they would get right on it!!!
I will fax it all first thing Monday morning and hopefully hear something soon.
Oh, I hope this works out!!!