Upper Control Arm Shaft orientation Theory
 

I'm in the middle of a crossmember swap on my '62 C10. I have the both the original upper control arm shafts and Moog K6184 positive camber problem solver upper control arm shafts in my shop. Both sets have a flat profile on the outside surface and a curved profile on the side where the shaft touches the frame(where you would put shims in to adjust the alignment).

Does anybody know what the purpose of the curved profile on the shim side is? Why they would do that instead of having 2 flat surfaces on both sides?

http://i931.photobucket.com/albums/a...psgh4rwbdl.jpg

Re: Upper Control Arm Shaft orientation Theory
 

The curve fits the curved washer that is the piece that goes up against the shaft. This allows the shaft to have full contact on the washer behind it as you change the angle of the shaft during alignment allowing you to pull it up tight. If it were flat it would only touch in one small spot.
Jimmy

Re: Upper Control Arm Shaft orientation Theory
 

Ah. I was not aware of the curved washer. My donor crossmember came in pieces and did not include shims or those washers. Any ideas if the washers are readily available at a parts store or alignment shop? Obviously there's a ton of them in the local pick n pull.

Re: Upper Control Arm Shaft orientation Theory
 

I doubt the local parts house would have them. LMC does as well as the local Pick & Pull.

Re: Upper Control Arm Shaft orientation Theory
 

Thanks, SCOTI, I got some at the Pick & Pull today. 15 minutes and $2 entry fee.