Transmission failure? 200 Maxima Ti

[Zippitynz]

4 weeks ago after all 6 Electronic Ignition Coils had been replaced, it was suggested that I get a transmission flush as the car seemed to be a bit “sluggish”.

As the transmission had been flushed earlier in the year, I didn’t worry about getting it done.

Over the weekend when driving locally, it became noticeable that the car was losing power when going up a hill and even sometimes between gear changes on the flat.

I had to drop down to 2nd gear to get up a motorway gorge and the hill to home.

There is no noticeable over revving or stalling of the engine, nor is there any blue or white smoke coming from the exhaust.

Any clues/tips as to what might be the problem?
Modified by Zippitynz at 3:54 PM 1/3/2010