Check the valve between the trans and the manifold too while you're getting the fluid changed. This can cause jerky shifting.
What's the car's make, year and model? Have you considered quality synthetic?
need more info to help you out. like the year make and model and if their are any check engine lights on
Change the fluid and filter.... But first, check the fluid level.. You may be low.
The gears are not switching smoothly. Is there anything I can do to fix this? An oil or something?
