It is not easy to determine the cause of your problem. The kits were bought in 2013, that means they are from the same series as the John's and Windex's, and their operate without problems.Ok, I am back with bad news. My second kit lost the 6th gear. It appears that the gear wore down, the material wiped out the roller bearing in the trans. Is there anyone in the north east U.S. that installs / has experience with these kits. The trans was overhauled prior to installing both kits. The first kit the 6th gear teeth just broke off with out warning. Second kit 6the gear wore down in a couple thousand miles before I got severe vibration. Ramid wants me to send the trans to him. I can not see the point of sending him good transmissions just to install the kits.
So how you describe the cause of the disorder is far better technically justified vice versa. First the shaft wills are not adjusted properly, so the bearing and shaft travel back and forth. Then pitting on the bearing develops and due to the continuous movement of the shaft the gears wear down.
However, we definitely do not want to leave your gearbox without solutions. I offer the possibility of sending the entire gearbox to us for 220 USD one way. Because you have bought 2 kits from us, I can offer to pay for transport one way. Everything else remains as I have already informed you by e-mail. Send us the second damaged kit too.
We would change the bad parts and then I would send them back with the gearbox. You would then have a gearbox and a kit. I would give you very good prices on all parts, but first I have to see what parts need to get changed. Work will not be expensive, about 100 USD.