Hey guys, my 98 XJ has about 4-4.5 inches under it and i recently started getting some noticable driveshaft vibrations. When I first did the lift it started as a RC 3" AAL kit but the AAL gave me closer to 3.5" so i added a 1.5" coil spacer up front and a 0.5" block and 4 degree axle shim to the rear. The t case is dropped 1/2" and I had zero vibes. Now after being on the highway i started noticing them more while im under acceleration around 45-60mph. Question is, has anyone ever used IRO's SYE kit for an NP231? and what will my driveshaft options be, I may drop the t-case another half inch but i know SYE is the way to go.

 

Auto 4wd XJ front shaft.

I've not used the IRO sye but I'm sure it'll do just fine.

Sounds like you have u-joints going bad.

 

Whoops.

 

I checked my u joints they seem fine but i will probably replace them and drop the t case before i dump 200 into a sye

 

I have the IRO Hnt and its fine. So far so good. Front driveshaft is the correct lenght.