I have a new 3 inch lift on my xj, & there's a creaking sound coming from the left front side? Creaks whenever I go over speed bumps or just bumps in general. Doesn't look like anything is messed up though.

 

I would get under the front and lube every joint that has a grease fitting,Drive it a day or two see if the sound is gone or not.While your under it double check every bolt you touched putting the lift on make sure they are still tight.