I put a new clockspring in my '02 Sport Trac last summer when I added cruise control to a truck that came without it. The clocksprings are different depending on whether you have cruise or not. I don't think there's a big difference between the Aerostars and Explorer/STs in how you access everything. It's pretty straightforward, but you do have to take the lower dash covers off to get to the harness connector as it's way down low. If you got a Ford part, DO NOT adjust it - install it as-is out of the box. I think the factory manual for the ST gives the impression the clockspring needs adjusted, but it doesn't. I need to put a new one in my other truck to get the horn and cruise to work, but I'm not in the mood to spend the $$.