I had repaired my passenger seat a few years ago with a Gamiviti gear and the driver side seat failed recently.
When I opened the gear assembly there was reddish gunk one end of the gear assembly that eventually got so thick the seat stopped moving.
After a deep dive on all the previous Mud threads on the subject, some described a rubber washer that I did not see.
It appears that the rubber washer reacted with the grease and dissolved into a muck. (There was a metal washer between the gear and the cover that was covered in the gunk also.) This was the case on both the gears.
After I reassembled without a rubber washer, there appeared to be about 3mm of play in the gear/shaft. I had a 3mm thick rubber sheet so I cut a new rubber washer and everything fit with no play. I used the red Toyota Rubber Grease to lube everything in the gear assembly.
I recall seeing some gunk when I did the passenger seat but I thought it was just the grease deteriorating. So it is operating without the rubber washer.
Lastly, I noticed on the other Mud seat gear threads that older assemblies have a plastic thrust washer with small metal bearings.
Just FYI on my experience that may be helpful to others.
When I opened the gear assembly there was reddish gunk one end of the gear assembly that eventually got so thick the seat stopped moving.
After a deep dive on all the previous Mud threads on the subject, some described a rubber washer that I did not see.
It appears that the rubber washer reacted with the grease and dissolved into a muck. (There was a metal washer between the gear and the cover that was covered in the gunk also.) This was the case on both the gears.
After I reassembled without a rubber washer, there appeared to be about 3mm of play in the gear/shaft. I had a 3mm thick rubber sheet so I cut a new rubber washer and everything fit with no play. I used the red Toyota Rubber Grease to lube everything in the gear assembly.
I recall seeing some gunk when I did the passenger seat but I thought it was just the grease deteriorating. So it is operating without the rubber washer.
Lastly, I noticed on the other Mud seat gear threads that older assemblies have a plastic thrust washer with small metal bearings.
Just FYI on my experience that may be helpful to others.