Transmission/clutches/oil pump seems to be slipping on my Rubicon 500 auto. Any thoughts on the cause?. It was submerged for about 10 minutes in knik. The water was not quite over the seat. Now when you go up hill at a steep angle or hit about 30 mph the machine's power to the wheels surges. The engine seems to run fine after an oil change. Anybody been there? Done that?