When driving over some kinds of bumps or bumpy roads, the front end on my '93 240 wagon makes a great rattling. Other bumps, no problems. A brick paved road (we still have one in town) or some potholes will cause the rattling at a speed of 25-40 mph.

On most streets or at highway speeds the ride is smooth.

I have had three mechanics look at this and I'm just about stumped:
- The dealer looked at it, thought it was an inner tie rod end, but when I took it in for repair, they said, no, it's the ball joint and so I had them replace that. No fix.
- My previous regular mechanic could not find any problem in a test drive.
- My new mechanic could not find any suspension problem but found one side wheel bearing loose and tightened it. While driving me to work in my car, his mechanic thought it might be a stuck shock.

Here is the setup:
- Strut inserts installed 17,358 miles back - unknown brand, could be Monro or some other standard brand. Mechanic claimed they are gas shocks, but could not tell me the brand. (one reason among many that he is no longer my mechanic)
- Rear shocks more recent - Sachs (Boge) Pro-gas installed by me.
- Sway bar upgrade - front 23mm, rear still 16mm (long story - I'm looking for a 19mm rear sway bar to get the right balance)

Any suggestions? I am contemplating replacing the strut inserts with Boge Turbo-gas but that's not inexpensive.
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'93 245, '96 850