how do i know which t case i have i heard you dont need a sye on the 242 with a 3 or 4 inch lift please help

 

Do you have Full Time 4wd on your transfer case lever? If so, that's the 242.

If it's 2-hi 4-hi and 4-low, then you have the np231.

I don't think it matters which t-case you have. When lifting a vehicle, you have to ride it first to determine if you need a sye or not. The older xj's can do away with sye's better than the newer xj's.

 

ok thank you i have a 231

 

muddeprived is correct... you should have a sye to keep from damaging your driveline with lift installed because it makes the driveshaft almost too short, especially when the suspension unloads.