So what does all this have to do with the question i asked?
"So my MDX came with Michelin tires and rode fine, then the place i bought it from said the tires needed to be replaced due to the fact that they where 3/32s off from each other and being an all wheel drive rhat was not ok
This is where it all went wrong. My comments are intended to dissuade other MDXers from falling for this trap.
"So they put new tires on and now it feels like the car is swaying side to side. Now only does it on grooved highway and not all they time. I drive for my job so I've been down these freeways alot and like i said the other tires didnt do this. Anyone have any advice as what to do or look for. I'm pulling my hair out and im bald."
As for the crappy tires that replaced the good tires, and which are likely the cause of your current problem, it's not likely your old tires are still lurking at the used car dealer ( because one of the guys who works there probably scooped them up in about 15 seconds and they are doing very nicely on his
AWD vehicle ), but if you complain loudly enough they may sell you some new good tires and give you credit for what you already paid for the crappy new tires. But if you don't do it soon, that option will probably evaporate.
Option B is to go to a reputable tire shop, such as Discount Tire, and they may give you a trade-in allowance for the ( ahem ) off-brand tires toward the purchase of some good new tires.
But please do NOT waste time and money messing with the suspension of the vehicle until AFTER you get some decent tires on the poor thing.