Bought a TJ recently and have some questions
 

A few months ago I bought an 06 TJ from a dealership in town. I love it but I know it's not stock. It has wheel spacers on it already and I feel like it's got some lift compared to other TJ's I see around town. The tires on it are also larger than the spare. Also the rims are off a Rubicon I think as I've seen people selling the same rims I have labeling them as "Rubicon Rims". When I change gears, 1st and 2nd gear seem to run higher RPMs than other manual transmissions I've driven.

SO I guess I'd like to know what kind of mods have been installed before I bought it. I'd like to eventually put a 4 inch lift with some 35's but I know I have to regear in order to do that.

Some concerns I have are: Since it's my daily driver, is it a bad idea to even go as large as 35's?

Me to, 2005 LJ Rubicon. Go to the TJ section on Jeep Forum. There's more info than you could read in a lifetime.

what motor? the straight 6? my roomate has a tj on 35s with no regear on it and its his dd. No issues from what ive noticed. Be careful with them 35s though he eats up spider gears like crazy..

It's a 4.0 I6. Forgive me for asking, but what's a spider gear? And how easy is it to replace? Thanks in advance.

When you pull off the dif cover its right there. its the 4 gears in a square shape. It takes us about 30 mins to and hour max.

http://www.rockcrawler.com/techrepor.../ptrax-c03.jpg

So I'm guessing that long term it'd be cheaper just to regear the whole axle to Rubicon status? Or since I won't be doing a lot of offroading is it even worth it? Thanks.

Regearing wouldnt help much, the d35 just plain out sucks, its also got the older style 30 i believe.. Itd be best to swap. For not much offroad im sure you will be fine. Just avoid and hopping/bouncing and heavy throttle if at all possible.

Is there a way I can tell what type of gears I do have? And how much lift I have? I'm starting to wonder if the dealership just threw on a budget boost, some wheel spacers, some rubicon rims with some 31's, and painted the muffler black just to make it look better to sell it. I The speedo is off a bit I'm guessing because whoever put the bigger tires on it didn't readjust it.