weird cars these, i mean, you fix one thing and then another thing takes its place on the to-do list

im sure ive read other people having a similar problem but mines a bit odd. going through the gears (auto box) the needle sticks on the change, then after a while it (almost) goes back to normal. switch the engine off for a bit, go to use it again and the same problem happens.
any ideas?
elliot
