If there are people interested in fixing their awd without buying a new transmission because of the transmission spline problem, you can buy a new set of gears that needs to be installed in the diff and on the transfer case shaft. There is a shop in Russia that actual can install those if you want for 300$ i beleive but you have to send them the diff and the shaft. The other option is to buy only the gears, you can have it installed in a local machine shop that has a lathe which reduces the downtime and the shipping cost.
here is a video of the company that makes them and show how to take out the transmission.
https://www.youtube.com/watch?v=-lMr9afF608
also, you can see the two parts gear in the pictures and some pictures of the process. I hope the pictures work
I bought the gears (in the pic) from this shop in hope of repairing my awd but my cx9 is just not worth it anymore so if someone wants to fix theirs and want to buy the gears, mine are for sale. Hope this might help someone
here is a video of the company that makes them and show how to take out the transmission.
https://www.youtube.com/watch?v=-lMr9afF608
also, you can see the two parts gear in the pictures and some pictures of the process. I hope the pictures work
I bought the gears (in the pic) from this shop in hope of repairing my awd but my cx9 is just not worth it anymore so if someone wants to fix theirs and want to buy the gears, mine are for sale. Hope this might help someone