Because of a vague initial post with no info on your setup and past experience with 4 inches of lift?

Seriously?


Keep an eye on the joints at the tcase ends of both driveshafts...

 

Make sure to get the angles right when you lift your jeep and keep an eye on it if you decide to not get new shafts. I put a 3.5 inch lift and 35s on my 2dr manual but (going with the lift manufacturers advice) i did not replace the driveshafts..... They ate themselves in less than two months, and I barely took it off road. I've got Tom Woods on mine now and haven't had any issues since. i have heard ChroMoly are good with a ten year warranty... i will go with them if these break.