2003 307 1.6 16v gearbox problem

My 307, has this issue with the transmission/gearbox. The vehicle will
run normally if i am accelerating or keeping the car in constant speed.
If I decelerate, the transmission changes down (and this is normal).
After this the transmission cannot change up anymore. If I restart the
car then the transmission changes up normally until the fourth gear,
but if I decelerate, then the problem persists again, so the
transmission changes down and never will changes up until I restart the
car. Any ideas on this would be greatly appreciated as i have been
hassling with the car for more than 3 months and the local delaers
can't give a clue about this.

Martin

 

The AL4 transmission is problematic. I know this from first hand
experience. Read through this group and you will see. Many
complaints, questions, problems and apparent fixes. Mine is currently
in getting a new transmission installed as we speak. I complained
about transmission slipping, nothing to do with gears not going in and
nothing about restarting the engine or anything of the sort, and they
simply said, "we will replace the transmission free of charge"...thanks
to Peugeot warranty.
In your case it could be a simple sensor of some sort. I don't know too
much about them, but I know they do have problems.
I don't know if I have helped much.
Dan.