Originally posted by daburban
http://www.firgelliauto.com/product_info.php?cPath=93&products_id=57
Two of these connected at one end with some type of uniball or bearing at one end to connect to spindle and connect the other end to the frame. They are cheap and have 400lbs of of pulling/pushing force.
I have a set of those actuators to lift my Carson top on my truck... They can push and pull 400lbs each but there is no way they would beable to take the abuse of the weight of your SUV sucking up the bumbs in the road. that shaft is 3/4" but its hollow because it has a screw drive in it, it would be like building control arms out of 3/4" electrical conduit.
If you wanted to do it you would need to design something that was stronger then figure out how to make it move