The bearing on the inside of the pinion shaft has failed on my RCK60b23bx mower, and I am having trouble removing that shaft. I think the bearing race has seized on the shaft and there is no way to get at it as far as I can tell. Just a note this gearbox only has one access port on the top. I see some have an another access port on the back side that would give access to the bearing in question, this gearbox does not have that port.