Auto trans. problem Help PLEASE !

Hi, I'm the new boy here and I have the following problem with my 1992 Clio RT Auto. Since a 1500 km round trip to the UK 2 weeks ago, (I live in central France) Clio has not been herself. Gear changing is now very notchy and whilst in motion especially at slower speeds will give a single judder every now and then. I have checked the fluid and it is a nice clean & red colour. As you guys know this model was not fitted with a dipstick, and so following my garage checking the level properly, I made my own. Tech détails as follows:
1992 CLIO RT AUTO fitted with AD04 4 speed switchable transmission.
I really love this car and don't want to change it, so any advice will be gratefully recieved. Many thanks in advance !

Hi again, further to my request yesterday, & having driven Clio more, I am not so sure the prob. is the trans. driving at any speed and she will suddenly without warning give a judder then fine for a few seconds then another judder and another, then all will be fine for several kms. then we start again, honestly it's driving me mad, any ideas anyone?

Hi there, problem solved, it turned out to be "controler compression moteur regler" whatever that is, as far as I can see it means adjusting the valve clearances: