Classic xl limited sleeper bottoms out on big bumps

I have a 2001 Freightliner classic xl limited with the factory 84" bunk. The problem is the sleeper hits the bump stop on big bumps. So far I have replaced the shocks and bags, it doesn't do it as bad now but still does. I am wondering if the shocks and bags where different for the 84" compared to the 70" bunk.. maybe Freightliner sold me the wrong parts, they look the same as the old stuff. The bags are inflated to the point that they are solid. Anyone have any ideas, my co-driver is complaining .. The top mount bracket for the bags has some rust but I don't think this is the cause because everything still attached solid.

 

Thanks for the info, I will check those numbers and go from there.

 

I have replaced both of the front cab mounts, both axle torque rods, complete new 5th wheel and slider, 2 new rear diffs...the list of work I have done to this truck is very long lol. I haven't replaced the torque rod under the cab yet. I might try that also while I'm wrenching on it. My most recent repair was a new steering gear box. I love the truck, everything I do to it makes it a little better. It has over a million miles on it, not sure the exact number though, ecm and odometer have both been replaced. I will definitely pm you with my next issue, thanks for the help!

 

I bought it in December, and was having problems with the way it was running. I think you are one of the people that made some recommendations then. So I haven't had it a year yet. I let the sleeper issue go for way too long, but I was trying to work on bigger things.