If it wasn't doing it, then started, then I don't see how it's normal. But, have you changed the fluid in the transmission? I believe everyone should look in the owner's manual and follow the "severe service" recommendations. Most drivers fall into that category anyway.
Whatever you do, do not allow anyone to flush the system. I have seen more reported failures from this than anything else. It stirs up dirt and then it transfers into the valve body. A normal fluid change on a regular basis (every 30k miles or so), is usually more than sufficient.
Whatever you do, do not allow anyone to flush the system. I have seen more reported failures from this than anything else. It stirs up dirt and then it transfers into the valve body. A normal fluid change on a regular basis (every 30k miles or so), is usually more than sufficient.