my car is experiencing gear box problems, If driving carefully with the 4 speed auto box will go up and down the gears ok, if you put a little power on the accelorator , The gear box
selector indicator will flash the D ( for drive ) and then ( we think ) will be stuck in 3rd gear, this stays like this until you turn off the engine and start agian. The bigest problem is when you try to pull away. I have changed the oil and filter , but this has not helped. The manual is telling us that there is a fault with the gear box, do you think this is the case ?