Lionel, those new pix just confirm what I said yesterday. I believe someone has deliberately cut (torched) away the rear section of each lower mounting bracket (the bracket should surround the square axle tube). I've no clue as to why such would be done but, in so doing it is my opinion that the rubber inserts in the axle that provide flex in the suspension were destroyed or severely damaged by heat from the torch as evidenced by the substance that has apparently 'squeezed' out of the axle tube at each end where the torsion arm stub protrudes. This may well have allowed the torsion arm stub to assume a 'skewed' position inside the square tube, causing or contributing to your toe-in condition. While probably not as immediately dangerous as I first thought yesterday (I don't believe the axle will separate from the chassis), that much toe-in (I'm still not clear whether you have a total of 1" toe-in or 1" on each tire??) will be very destructive of your tires
& may (probably?) cause other stress on the 'running gear' of the trailer. Assuming the axle is otherwise 'square' with the coupler, while you're towing each tire is 'scrubbing' rubber off the outside part of the tire tread with each rotation.
The more I look at your pix, the more it appears to me that your mounting configuration may be original, save the 'surgery' on the rear of each lower mounting bracket. The upper brackets appear to be a 'factory' installation as I can see no visible welds or other mechanical fastening devices. I've never seen that set-up before but as I mentioned previously it's a perfect set-up to allow easy replacement of your axle with a new bolt-on unit that has brakes
. Would be a good opportunity to change the torsion arm start angle also, depending on how low your trailer sets/tows. Betcha with that suspension damage you don't have a lot of clearance between the top of your tires
& the underside of the fender well.
Also, I'd be surprised (shocked??) if your suspension could pass the 'jump' test. My guess is that the only 'flex' you're getting from your suspension is the sidewalls of the tires
. An easy check is to lie down in a position where you can watch the hub end of the torsion arm, have someone (a relatively heavy person, 200# or more) stand inside the trailer directly (more or less) over the axle & jump up & down several times. With a 'good' axle you'll see the hub end of the torsion arm move upward (flex) each time the jumper's weight
comes down on the trailer floor, & return to its normal resting position. I'm guessing you'll have little if any flex other than the tire sidewalls.
Here's a pic of the old axle on my '84 Scamp
before I replaced it with a new Dexter #9 w/7" electric brakes
& 22.5 degree down angle leading arm, & the same side with the new axle installed -