I realize there is a lot of info on this if you search the forum but I haven't been able to find any direct answers, lots of conflicting info. Here is the situation...I have a 2010 Challenger R/T Classic Auto so it has an open diff with 3.06 gears. I have been wanting to change it do a limited slip diff for a long time and the other day I ran across a good deal on a used one on ebay so I bought it. It was advertised that it came out of a 2012 Challenger R/T. There was no VIN on the ebay ad. I got the diff the other day and it had a tag attached to it with the VIN and its from a 2012 Challenger SXT Plus according to the VIN. I decoded the VIN and it does say it came with 3.06 gears but I can't find anything that says if it's limited slip or not. There is no tag with a part number on the diff. There are numbers stamped on it in a couple places but none of the numbers match up to any part numbers I've seen for diffs. I'm just trying to find out exactly what I have so I know if it's limited slip or not and if it will work in my car or not. Can someone look at these pics and tell me what diff this is. If not can anyone direct me to a source that can tell me? Any info is greatly appreciated!