If there was debris in the fluid, you would find it in the pan. The filter should be stopping it from going throughout the trans.
I have to be honest, many places want to flush transmissions these days. Even though that removes all of the fluid from the unit, it doesn't replace the filter and pan gasket. I also have to be honest and say that most times, servicing the unit doesn't fix the problem. You may, however, want to drop the pan to check if the filter is partially plugged.
By the way, glad to help. I just hope I am.
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Wednesday, February 25th, 2015 AT 7:30 PM