Hi all

I have a 2013 Astra SRi 2.0 CDTi Auto Tourer with 45k miles on the clock

It has been perfect since i bought it 4 months ago but noticed in the last few days that when on the motorway (whether the engine is hot or cold), as soon as i let off the accelerator, even a little bit, due to traffic etc, it changes down from 6th to 5th with a very small jerk. The jerk is much more noticeable than normal changes and wasn't happening last week.

I thought maybe it was trying to keep the revs