What rear end is in your truck?

3:55's......

3.55 and open diff kills 60, mph is bout right. I wouldn't be disappointed not bad

Thanks... I'm definately gonna be getting me some 3.92's now!

4.10s and locker

4:10s and that powertrax that was for sale on RF.

Don't you all think 4:10's would be a little much for mine?

Its less than a 200 rpm difference at 65 mph between 3:92s and 4:10s.

http://www.jeep4x4center.com/jeep-ti...atio-chart.htm

Note you ahave to drop your rpms about 20% for od.

Whats your rpms now at 65 mph? Or what size tires are you running?

Just did the calculations on the difference

3.55 - 2000.8 RPM

3.92 - 2204 RPM

4.10 - 2316.8 RPM

I took the 20% drop into account on these

Now my question is, how much better would the 4.10's be then the 3.92's?

RPM right now is at about 1900 and I'm running 31" tires