If they are like my 99 Durango they can be done without R&R ing the arms.I use a ball joint press and my good impact.I remove the knuckle to get more room.I know my lowers you have to check the snapring for clearance.I did all 4 at the shop in about 1/1/2 hours.Did the ones on my kids 83 Ram in the drive in about 2 hours. Rocky