We are replacing our axle because I believe it is the original which makes it over forty years old. The electric brakes
have been disconnected and the ride is really rough so the rubber inside the torsion axle is probably shot. It also appears a little "bendy" although it might be an illusion. Hard to tell when you lay on your back to look at it. I want to take it off the frame as well because the frame has already been an issue. The previous owner has had it repaired at the forward bend and I had the bumper repaired. I'd like to be sure there are no microfractures, make any repairs and clean it up so while it is apart, a new axle is an easy install. I also have some sagging in the egg, the door doesn't align properly and some cracking at the wheel wells. Not drastic, but enough to concern me as to the frame/axle integrity. Ours was painted a nasty battleship grey but hubby has been sanding away so we can repaint. It is gutted and I have the floor out for rot by the door. New floor is cut out but frame first, then floor so everything lines up nice. Also have been reinforcing the roof for sag, and moved/replaced the vent. Have glassed some larger holes and put in a cargo door on one side. Once the new axle is in, I will rewire all the exterior lights
and install the remote brake system. Next step though is to shore up the roof for the winter months. We haven't room to store it indoors so it is under a shelter in the yard to keep the snow off.
Not sure if yours is a 76. Ours has no porch light
so maybe that was an added feature later on. Ours has two decals that got painted over just left of the door toward the bottom which I can't read but maybe if you also have them they can tell you something about the trailer.