FYI, mowed several times. - After installing/rebuilding (replaced damaged and worn parts) on front and rear axles the new height adjustors stay put and there appears to be a definite difference in the speed of the direct drive. Wow! Friction reduction and less stress on direct drive system. Like sgkent said the axle maintenance is likely missed with some folks. Will be cleaned /inspected every season and worn parts replaced. This may also explain why the right rear tire wears a lot more than the left rear tire. Will likely buy new tires also since the bolts holding the tires were severely worn. Therefore, old tires are little loose on new bolts. Thanks for feedback and all your help.