I'm sorry for your problems. Yours is a different issue than we're discussing in this thread. The shudder that we're discussing, with a remedy, is upon acceleration from low speed. It is not something that exists at constant speeds, or is reproducible at higher speed.
I hope you can resolve what you're experiencing. It sounds more like alignment or wheel balance, but I'm sure that's been checked. Perhaps search around on the forum for other problems that sound similar, or post a new thread. Good luck.
at hard acceleration i do get the shudder too especially if floor it getting on highway
now had wheel balance checked twice, road force balanced and even did alignment.
i know with 22s there should be some vibration, but not this much at 75 where you feel it in the entire car