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Reply to "Input shaft 1st / ring and pinion set pictures"

Well, if you were to replace only the bearings, the unit could last some longer, but there is no way to predict for how long... And to rebuilt the unit with only the bearings replaced, drive a 1000K or so, and have completely ruined gears - in which case you'd have to replace many if not all bearings again - would be kind of retarded no..?

On the long term the best scenario is to replace all what shows signs of any damage. Worst is the spalling (surface material coming loose) on ring and pinion. Other parts show a reasonable amout of indents and scuffing. Rust on gears doesn't need to be a problem as long as you can easily wipe it off with something like Scotch brite, but if not, the rust ate itself too deep in to the material, and might cause more severe damage on the long term.

Go for the best solution you can affort...

FWIW, transmissions, though of a somewhat different kind is my job Wink
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