Features redesigned internals to eliminate the problems with the factory OPDA seal.
Factory OPDA had a seal under the upper bearing which caused the bearing to fail prematurely
This upgraded version relocated the seal to above the upper bearing and an oil groove in the shaft of the OPDA which is designed to bring oil up to both the upper and lower bearings.
Compatible With 2005-2006 Jeep Wrangler w/ 4.0L Engine