That sounds really awkward actually. I mean, in case the transmission has been serviced at the right time, then it all must be ok, and I just cannot understand what is causing this kind of issues. My 4eat transmission has never had a similar issue, it has been working perfectly, it never had any kind of issues. However, I have to admit that I have been servicing it really well. I have also used some really useful information from cararac.com/, to keep my transmission in the best possible shape.