The arm I refer to is a stretched A shape. It wrapps up to carry the outer wheel bearing and folds back under the car. It is up to maybe nine inches wide and consists of two pieces of heavy sheet metal formed and welded along the edge. It will bend if the car is slid sideways and hits a curb or it may rust and allow the outer wheel bearing to wobble. If it is failing usually your rear wheel on that side will begin to lean in at the top.

It is fairly easy to replace and can be bought reasonably inexpensively used.

Tom W

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.