Yep. Been up there and a few over. No issues ever with mine.

 

Make sure all of the lug nuts are tight enough.

The same problem happened to me in the past and come to find out one of my wheels was not tightened all of the way!

 

X2. You won't find a rounder mt tire. They don't take much weight to balance. Mine run smooth at every speed

 

The Toyo M/T are a little bit rounder. Some don't require any weights to balance. Makes sense that Nitto's balance well since they are owned by Toyo!

 

The jeep is a 2012 with 7000 miles, I would imagine axle and drive shaft is good.

 

I checked the tires and they have 42psi in them. Is that to much?? That is what the shop put in.

 

If you have 35" tires, the sweet spot for those will be around 28psi. The Nittos are a load range E tire and are heavy and won't flex well. Made more for heavy trucks that tow. I run my Toyos (basically same as your Nittos) at 28 and it rides much better than 40psi which the tire shop had them at when I bought them.

 

They are 33's . At what PSI will I trip the TPMS?

 

Most likely the stock setting is in the 30's. I use a Superchips which allows you to go as low as 26psi if you choose to keep TPMS active as I have chosen to do (I had my TPMS sensors moved to my new wheels). I can shut it off completely with the Superchips if I want to (or a Procal, Hypertec, etc...)

When I went in to change mine, I swear my stock settings were 36psi but that seemed too high in my opinion and thought maybe that was just a Superchips default starting point (not what my Jeep had). Not sure.

Either way, if you have bigger tires than stock, you probably want to adjust your speedo anyway so you are on the right shift points and getting accurate miles on you odemeter. A Procal is about $150 new or @$100 used and can easily adjust the psi setting all the way down to 0 if you so choose. (among many other cool features)

 

What you shoud worry about first is getting the right psi. Lot's of people use the chalk test where you draw a line across the tire and then watch for how evenly it wears off the tire. That will help get the psi to a point where the tires wear evenly. Once you get that, you can worry about how to deal with the TPMS if it happens to go off.