I put the 9" in the Rampage because it was for DW and at first I thought about changing rear gears for the daily drive.. easy drop out the center and put a road gear in.. then I changed my mine for the 518 OD.. so glad I did... but the 9" will be under it with a 4.10 gear for now... I might make a gear change later EDIT For the Mopar purist.. the 8 3/4 IS a true mopar rear end.. designed and made in a Chrysler plant.. as was some of the smaller rears with the stamped housing