Walker Transmission

Had transmission rebuilt 7/d $and has returned on more occasions and was told that transmission is failingI was told the issue was resolved on three occasions but today when I had my vehicle maintenance performed I was told my transmission fluid was filled with metal fragmentsMr Walker told me after the 3rd attempt to repair my transmission that my "warrenty" was expiredHow can a warrenty expire when my problem was never resolvedThis doesn't mention my issues with the damage that occurred to other mechanical instrumentsI just wish he would have told me this repair was above his abilities