Quote:
Originally Posted by red560SL
The stress (stretched part) is toward the front of the car. That would mean that the sub frame would have had to slide toward the back of the car which seems almost impossible to me. How in the world could the sub frame move toward the back of the car in some kind of collision? Pushed to the front by rear impact maybe, but to the back?
I do have another theory. What I suspect is that the vehicle was towed incorrectly. My guess is some jerk attached cables to the trailing arms and pulled it up on a flatbed truck. Nothing else that I can think of makes sense otherwise. If the damage was on the back of the sub frame then I could imagine a rear collision of some kind, but damage in the front? Just doesn't make sense.
I think what I'll do is drop the differential and pull out the entire sub frame and do a real good inspection. I'll take some measurements and check for square. If I can't find anything else wrong with it I'll straighten this out with a pin and maybe some heat. I'm hoping the passenger side has the same exact thing. This would at least help confirm my theory. Either way I know I need to yank it all out and have a real good look at it.
Later,
-Tony-
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The stress (stretched part) is in the forward sub frame mount ears...
Note:
This is a wish bone sub frame = two points forward, and one point rear.
This single traumatic stress appears DIRECTLY to the left or right (could not determine from the picture).
An out of control spin/slide which was stopped by impacting a rear wheel, could cause this (the wheel rim would have been wrecked (easily replaced).
I suggest extreme inspection of trailing arm bushings for trauma, and verification that they have not been replaced by the previous owner.
Trailing Arm Bushing W126 1985 300SD DIY
http://www.peachparts.com/shopforum/showthread.php?t=111052
The differential mount will need to be replaced, the rotting/impact trauma combination will have ruined it = sagging, excess movement.