I flat tow my 96 tracker. I have free manual hubs, tow with the transfer in neutral, transmission in 2nd, and start the engine every 100-200 miles. My problem is that after I flat tow for about 100 or more miles, when I start my car I get a loud squeal (like a fan belt) for 10-20 seconds after start and then it stops. This happens every time After I tow again. After the last tow (and it's squeal) it will not squeal again on startup until I tow flat again. Any ideas as to what's going on would be helpful.