DOH <img src="/forums/images/graemlins/rolleyes.gif" alt="" /> Well heck fire, I sure got my stuff all bass ackwards now didnt I. Gonna take my GPS with me tomorrow to see how far off the speedo is. Checked the diff tag today and it is 3.73. Found a chart online that showed I need 4.27 to get back to stock arrangement. I did spin the rear wheels and both roll forward with the back in the air so there is a lSD in there. Didnt seem like it last week when I got stuck in the mud in 2wheel drive. Looks like the only option for the rear is a detroit locker, while the front is a Dana 60 so could go with an e-locker there.