my mazda6 has an intermittent problem it kicks gear and the AT light comes on on 2005 Mazda Mazda6

the light stays on and i noticed it didnt go into 2nd gear gaining speed or downshifting. Sometimes it kicks others it doesnt. After shutting it down and starting it was ok the next time i drove it. I never know when its going to act up .

Asked by for the 2005 Mazda Mazda6
Being an owner of a Mazda 6 2006 I had a very similar problem. when
Accelerating the car would kick as it was shifting. It would do it more often
When you accelerated hard, as oppose to regular city driving. Took it to dealer
And the tranny had to be replaced. That was 3 years ago and is all good
Ever since. Hope it helps.
thanks I took it to the dealer also and had the transmission replaced also.