Droopy Rear

[aliendude]

The guy that I got my Clipper from used to tow a 24ft boat with it and
I guess it helped bend the rear of the RV down.  
   I looked under the RV, and it looks like there has been some brace
work done.    A tri-angle welded on the darkwater tank side.    
It goes straight down from the frame then forms an angle and goes
back to the back of the frame.     It looks cobbled together.   This is
not stock is it?    

If the RV has a droop,  Can it fall apart?  You know?   I read that they
droop.    I'm just wondering if the rear add on frame can fall off.  
I don't know.  

I have not really looked at how it is attached.   It's covered in dirt.  
So much so I had to archeologist to find the gas tank filler neck hose...
I think the guy got stuck launching a boat, and went swamp mudding
flinging to get out.  

Once I get it registered I have to take it to a car wash and clean off the
dirt.  

Example : the rear leaf springs were caked in mud and solidified.  
I wire brushed the sides of them with a drill and soaked them multiple
times with WD40 just to get the RV to bounce if I jumped in it.  
IT was solid.   Would not even move.

I plan on changing the Differential gear oil too.    
It just takes regular gear oil right?     They didn't ever make Pos-i-trac
or Chrysler "SureGrip" onces did they?  
Just out of curiousity what is that rear end?    It might help sometime
if I ever need to learn to change a load bearing.  
Anyone have tech data for it?    
For instance,  how do you even get to the brake shoes....