2010 CX-9 AWD sensor issue

Did the left rear and right rear wheel bearings with no issue's. After test driving the car, my abs traction control lights came on, and my code reader is giving me a dff for the left rear speed sensor signal missing. After inspection, the left rear abs tone ring has 1 chipped tooth that is sitting lower then the rest of the teeth. I am not sure if this is my problem but its either this or the actual sensor which is not damaged.
My question is could this be my issue?
Also I have not found any help or videos or anything on how to remove the rear cv joint. I have the new tone ring, but do not know how to get to the front of the shift to top of the old and tap on the new. Any help would be GREATLY appreciated, I am truly lost here.
Thanks
 
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