hard time shifitng in 1,2,3 gears on 2004 Audi TT

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I have a 04 Audi TT with 60,000 miles. Serviced regularly. There's an issue shifting from 1st , 2nd and 3rd. Sometimes falls back a gear. My car is an automatic. Took it to my mechanic Audi specialist, he hooked it up to the computer, it read NO ISSUES....there's a big freakin issue here. Help, before I get another whiplash and leave my tranny in the middle of the road!
(1) Answer
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First, what's the fluid look like? It IS NOT lifetime fluid. No such thing...

Clogged fliter causes erratic shifting as well.
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