I hope someone can point me in the right direction. Looking for the gears inside the final drive new or used. There are 5 gears around 3 inches in cirumference. 3 are marked "73r" (23 tooth gear) (app 1" thick) and the other 2 are marked "75u" (23 tooth gear) about half as thick as the other three gears (app 1/2 inch thick) Searching i cant find anything. What does the 73r & 75u mean? Thanks for any and all help, Shawn
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