I've had this popping sound coming from the front driver's side wheel for about 3 years now. 2 years ago I rebuilt the front end and it didn't get any better. I took the car to a suspension shop and the owner was nice enough to let me stand under the lift with him as he checked every bolt and joint. He said that everything looked good and that I have nothing to worry about. When he was backing out he hit the brakes and the front end made the pop sound. He immediately said that it sounds like the spring isn't seated. He then noticed that the spring pad isn't entirely on top of the coil spring in the tower. This explanation makes sense because the popping became much worse after I swapped engines in the car. I can see how the spring might have moved a little bit with all of that weight taken off. The popping seems to be getting worse every day and only happens when I turn the wheel to the right at slow speeds going forward and reverse. It will also happen occasionally when I brake suddenly. I'm having a hard time believing that an unseated spring would be producing all of this popping unless that pad up there is starting to get torn up. One other point to make is that the steering wheel feels a little wobbly when it's about 10 degrees from maxing out to the right side. Any ideas? Thanks

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'81 300SD