8spd with 35s

I recently noticed that my 8spd has been making an audible but not loud whining noise in 5th & 6th gear while climbing a grade on the highway. It kind of sounds like my Jeep has a little super charger or something. I have heard that this may mean the transmission is low of fluid. I understand...

I'm looking for feedback from those who have run stock 33s with the v6 (or the 2.0 i suppose) with 8spd auto and went to 35s. Preferably somebody who ran the 33s long enough to make a good comparison. Was the acceleration change noticeable? Could you feel the extra weight? Gas mileage...