However if clutch-pedal pulsations are noticed or if gear shifting is hard and gears jump out of mesh then alignment should be checked. this requires a special alignment arbor and dial indicator .

If either the number of sun or ring gear is not multiple of planet gear, system will run effectively, with lower impaction of tooth mesh in and out.

Out-of-mesh trouble in 4th gear was found in actual usage, but the trouble is solved by changing the synchronizer structure, increasing the rigidity of the synchronizer gear sleeve and etc.