Took my wife for a ride in her '03 vert, top down. When we got home I put the top up and the drivers back window started up and then started jerking back down. When I tried to put up the window again it sounded like something was whipping around in the cavity. It appears that the cable broke that puts the window up and down. How hard is it to put a window regulator repair kit in these cars? Local dealership has one for $97.00. Is there any things to watch out for? I have watched a video online but it looked more like he was changing the parts out that were already there but mine has the cable broken.