Please help
got the wife an 07 JKU X S package with the auto and 4.10 gears. the stock tires are 245/75/16, and it's good on the highway. Only had it offroad a few times, and it's OK there also. I could not imagine running 33's let alone 35's with the stock gearing she has. JMHO.
Originally Posted by tnew17
I have a 2007 JKU. Not sure what package i have. How would i know if it is towing or not? i bought it used at a large dealership.
If you have a hitch then most likely you have the tow package and 4.10s. I ran 35s with 3.73s on my 08 with the 3.8 and it wasnt to bad with the OD turned off. Eventually I regeared to 5.13s and got a superchip flashpaq much better power and throttle response now. My advice is go to 35s!
You won't HAVE to regear, regardless of tire size. It's a preference. Recalibrate the speedo, and push the OD Off button when you get in. And if you haven't bothered to open the faq's yet, plug some numbers into the chart you'll find in the drivetrain section. (use measured tire height, not mfg spec. And if you want OD Off rpm's, just divide the number you get by .69)
Too bad there isn't a Show & Tell area on this forum that would be full of pics of various build combinations. Oh, wait...
Jack up the rear end, spin a tire, and count driveshaft revs. Or, go to the jeep website and send an email with your VIN requesting a build sheet. That will tell you what your jeep left the factory with.
Too bad there isn't a Show & Tell area on this forum that would be full of pics of various build combinations. Oh, wait...
Jack up the rear end, spin a tire, and count driveshaft revs. Or, go to the jeep website and send an email with your VIN requesting a build sheet. That will tell you what your jeep left the factory with.


