I was very gullible, I was told that my transmission fluid was dirty and needed too be changed, I told them that it was just over a year old and maybe 15 to 20 thousand miles, so I asked why would my transmission be reading dirty, they told me that it just happens. Well after what I went though later on with the oil pump ecr valve and trans. well, that's another story, I did feel they were covering something up after wards, but I paid to have it done