Folks- Got the following issue handed to me over the last few days looking for parts source. 2001 coach is in the shop at Redlands, cradle casting that attaches rear axle to the trailing control arm is cracked in coupla places.
This is on the earlier type of suspension with two rows of 3ea bolts tying hanger to frame rail, all 5/8" bolts (left on photo is forward; photo taken from amid-ships looking toward inside of PS frame rail; trailing control arm is on bottom of photo & subject "cradle" part is lower right):
Potential affected part is the cradle on under-side of axle with U-bolts over top of axle.
Here is a view from the front showing cracks developing between the large U-bolts and along the underside of axle, view is rear facing:
Here is a second view (note crack on right side, that can't be good):
Couldn't say at this point if this is a one-off issue or systematically may affect a number of units. It appears service parts are available from SAF-Holland who now owns Neway:
Aftermarket > SAF-HOLLAND
If you have the type of suspension in 1st photo above, I recommend having your rig checked next time you have chassis service done. Or if its a hot day and you want some shade & fun, crawl under there w/a flashlight, camera, bag lunch & a nice IPA or a good chianti, and make an afternoon of it, maybe invite some friends?
Here is an exploded parts diagram from SAF-Holland (the forward control arm hanger is a newer type than 1st photo above, but cradle parts appear to be same thing):