Originally Posted by daddyjeep
You should find out if the gears were replaced when the larger tires were installed. That will answer the getting up to speed question. If it still has the stock gears it could be lacking a bit of its original power.
The 2.5L will probably have 4.10:1 diffs as original, which helps with the bigger tires over a 3.xx:1, but if you don't have a manual tranny to work with to keep the RPM's up a little, it's gonna bog down. You'll know on the first test drive!
I can get to allllmmmooooosssstttt 80mph with the pedal romped to the floor. It's kinda like cruise control (which I don't have). And 5th...please. I need to scratch that off my shift knob. Great for long gently sloping downhill highways. Seriously, I can roll 70mph all day except for steep or long uphill grades, which require a downshift to keep the speed. If the tires are balanced correctly and in good shape, the ride should be great, for a Jeep, that is. The bumpity-bumps are part of what make a Wrangler fun!
Hope it works out! You'll hate yourself for waiting so long to get one, even though they can, I mean will, drive you CRAZY!!