I cant say with a lot of certainty since its been a while since Ive looked at mine, but it is possible that the CV shaft can induce some vibration, Ive been down that road and it is possible that if that seal is bad that some tranny fluid is going to get out. Pull that shaft out to replace it and you can loose about a half a quart of fluid.
I do believe that seal can be replaced in the car (i.e., not having to pull the tranny) but for any definitive answers regarding the tranny I'll defer to Trannyman as he is the resident expert in these matters.
I'll also move this to the tranny section since it deals with that.
