FWD models wouldn't have these splines that lead into the TC.
Agreed, FWD models won't have the splines, sorry for confusion, I had read something on this forum that a Mazda dealer said a transmission failure caused the transfer case to fail and they would only cover the cost of the transfer case, not the transmission (TOTAL BS !!! if the transmission failed, why can the car still drive normal in FWD mode).
Lord knows how many used AWD CX-9's are on used car lots that are really just FWD ???? anybody looking to buy a used AWD CX-9 better run the transfer case test before buying (post #3 in link): http://www.mazdas247.com/forum/showthread.php?123852535-Sorry-guys-another-awd-question
My thinking was although FWD models won't have the transmission splines; the transmission system itself is still basically the same for both FWD and AWD just the coupling (splines) to the propeller shaft for the AWD version.
So if the CX-9 transmission design is inherently subpar, FWD owners would also be reporting about transmission failures, but this is not the case. Thus, it's logical to conclude that the CX-9 transmission is sound, as you've also proven by (unintentionally and unknowingly) driving in FWD mode for a few months. It's the transfer case causing the spline failures.
IDK, you guys who are servicing the TC regularly seem to be having good luck. Maybe I'll hold on to my Mazda after all. Thanks to everyone here for your insight, resourcefulness, and for sharing your knowledge - especially to Avidien for documenting the process. I think I’ll be buying the pump, some bricks and the proper oil. This forum is fantastic!
AGREED !! Avidien is da man !! Mazda dealers should take note and offer his procedure as a standard service to their customers.
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