Just wanted to let everyone know ,if you are planning on buying a redi-sleeve to stop your rear side axle leak this is the size of the ledge that the seal rubs on 2. 87inches or 73. mm is the size sleeve you will need! i had to dissassemble my axle cause no dealer or parts place could tell me the size i needed. (this is for a 2001 ram with dana 70 and disk breaks)