I recently bought a 1970 Gravely Custom L-8 2-wheel walk behind tractor. While inspecting it I found the pinion shaft to be bent at each of the 3 splines. It appears the machine was stopped rather abruptly one or more times. I have a spare pinion shaft, so can easily replace it. Is there any other damage I should look for that might be associated with the bent pinion shaft which could impact the run-ability of the machine?