I have 32's right now. If 34's would suck, what about 33's? Would there even be a visual difference?
With a manual you'll be all right, as you get to be "the decider" on where in the power band your shifts are. I have the 3.8 and 33's with standard trans, i just wait until the rpms are high enough to be acceptable, then shift.
Edit: after seeing nknacd's post, i feel i should mention that i hardly use 6th anymore either
i'm running the 33' nittos which are heavier then duratracs and it does ok. I don't get to use 6th gear too often though. My 12 JKU is my DD and i have no regrets so far, but then again my commute is short, only 14 miles each way
2012 JKU Sport | 3.25" Rough Country Suspension Lift | 32.72" Nitto Terra Grappler P285/70R17 117S on 17" ATX Slot
Search the forum and see if anyone else is running 34s. Ive seen people say 35s and 3.21 have mixed opinions. Some bearable some not soo.
I have 35" nitto's on 3.21 with stick shift... it's pretty bad if your in an area with a lot of elevation changes, I have a friend in FL who thinks its fine. I'm in VA and plan on having mine switched out to at least 4.88's, sooner than later hopefully.
I have a 2012 6speed manual with 2.5 aev lift and 35" mt/r tires and 3.21 gears. From everything i read i was sure i would have to regear. But after driving a few hundred miles so far i am not feeling the need at all to regear. Their is a difference and for the most part i dont use 6 gear anymore. Drive it a while and you decide. I know it is not the ideal set up but i just am not finding it to be near as bad as most say it is.