I suppose a slightly oval suspension bolt hole would cause the noise you mention... Happened on my 1800 too. But mine was out by 1/8"(~3mm ack) or more. I did a little welding, and started a bolt tightening maintenance program.
I would like to suggest though, that you check your rear brake drums. Specifically, the woodruf key and the bolt. If the bolt that holds the drum on gets a little loose (doesn't take much), the drum will break free of its press fit on the axle. It will pivot slightly on the axle, and eventually make that woodruf key into an hourglass shape and also wreck the slot in which it fits....
Get back there and tighten the biggie bolt that holds the brake drum on. See if that helps.
-Matt
|