I had an "interesting" problem develop with front suspension on early TR4. The issue started when I began jacking the right side of the car. Just as the tire was lifting off the ground (thus weight transfer) there was a very loud BANG. I cannot identify anything that visually appears to be broken, bent misplaced etc. Here is what I do observe (and it may or may not be related to the bang). with the car on stands I can place hands on the tire at 12 and 6, and when I give an up and outward movement on the 6 hand I can see movement in the trunnion, vertical link, ball joint and upper A arm. No movement in lower A arm. Ball joint was new a year ago at which time I also replaced upper A arm bushes. At this point I plan to replace lower A arm bushes, trunnion bushes, seals etc as it seems prudent to do so. That said I would welcome thoughts on this issue and whether there is something I should specifically investigate.