You have the AX-5, as the Peugeot BA 10/5 was discontinued in '89 and was only used in 6 cyl's anyhow.
Good thing you asked instead of looking at a manual. They manuals and even Chiltons and Haynes manuals reccomend GL-5 transmission fluid. That fluid will corrode the brass parts in the transmission and ruin it. It actually takes GL-3, which I only could find at the dealership and it was expensive. I went with the reccomendations of this site and got some Pennzoil Synchromesh which is excellent, but I also have seen Redline MT-90 recommended here by some in the know. Either would be a good choice, but stay away from GL-5!!! It has eaten MANY a transmission.