Yes you can drive with one hook...but don't go over 30mph. I've got a feeling your top is NOT seated correctly. I had to readjust the releaseOnly have J hook on driver side (will close with manual help) passenger side missing. Can you drive the car with one hook holding the top down?
Where you able to get the whole clamp assembly out. I have the clamp assembly but can not figure out how to get at in??It took me about 2.5 hours to finally get the install of the new arm done and even at that length of time I could not get the flex pin situated correctly where it would work without me assisting it. But, it does work. You may want to put some type poly coating on it as mine is showing signs of rust already.