I have heard of them bending & breaking up or down over the axle from overloading but mine has bent in the middle left to right.
Driving my MN at 110 kph on sealed road unloaded & went round an off-camber corner to the right. No bumps just a raised piece of tar on the edge where the trucks have sort of pushed up the road a little. I went round the corner with bit of a lean and felt the left rear hit the raised section of tar which caused the vehicle to jolt a little to the right, but nothing big and there were no worrying noises. Honestly, it wasn't that bad & there should not have been an issue, but unbeknown to me there sure was.
All of a sudden I could hear air & road noise coming from the left rear of the cab & I checked the rear windows but they were up, so I kept driving. Then about 1Km further on I noticed that the steering wheel was now 1/4 of a turn off center to the right.
I pulled over and had a look but could not see anything wrong. so I went to my mates place because he has more room to look it over & he followed me down his street. When we got there he said that my ute was crabbing like crazy.
So we checked the spring packs to see if one had moved or broken but they & the shocks were OK, we then checked for bend crinkle marks in the chassis in the usual spots but it was OK too.
We then checked the front suspension & everything looked schmick under there.
But just under the left rear door on the chassis just in front of the wheel the black lumpy sealer was cracked and a bit of it missing. On further inspection it looks like the dam chassis has bent sideways. My mate rigged up his dumpy laser leveler on the floor & at a rough guess the rear now looks to be about 20-30 mill off center & to the right and the left rear cabin door no longer seals when its closed.
Being Easter there is not a lot I can do about it for a few days, but it sure looks bent to us. If it is, then it's ridiculous & these things are useless pieces of junk.