I am experience some pretty severe grinding noises after mudding/wheeling today. I have a Manual 2010 JK Rubicon with a JKS jspec 3.5in lift kit on 37’s. I am posting some videos because when in gear and stepping on the gas I am getting some pretty intense grinding noise, and also while decelerating in gear/engine braking, I am getting a finer grinding noise. The first video is the lower more intense grinding from accelerating in first and second gear, and the second video with be of the finer grinding noise decelerating/engine braking in 3rd and 4th gear. Please help...

 

I'm unable to open your videos. Grinding is not good, stop driving it immediately, and consider looking inside of your differentials first. Can you upload your videos to youtube?