$117.28
Part # R0517200
By Polaris
Transmission Gear/Bushing Kit - R0517200
Easy
Less than 1 hr
Screwdriver
I ordered the parts I needed based on this link: https://www.inyopools.com/partlisting/polaris-9550-robotic-pool-cleaner#plp-key-2 Watched a couple videos and performed the fix.
Were these instructions helpful?