4 - 80ENGMIDDLE GEAR5.Remove: Front drive shaft coupling Bearing retainer 1 BearingNOTE:Attach the ring nut wrench 2.CAUTION:The middle driven shaft bearing retainerhas left-handed threads. To loosen thebearing retainer, turn it clockwise.Ring nut wrench:P/N. YM-38404, 90890-014306.Remove: Middle driven shaft 1(with bearing)CHECKING THE PINION GEARS1.Check: Damper cam surfacesWear/scratches → Replace damper cam anddriven pinion gear as a set.2.Check: Damper cam springDamage/cracks → Replace.3.Check: Gear teeth (drive pinion gear) 1 Gear teeth (driven pinion gear) 2Pitting/galling/wear → Replace.