I have had a weird vibration in the rear that comes and goes through the rev range. Ive pulled apart and reassembled the exhaust twice with no improvement. Just recently I realised that the bolt on the passenger side that attaches the supporting bracket for the rear bumper and tow bar was loose allowing play in the rear left hand side of the bumper. The bolt is the rear one of the 2 and is freely spinning, unable to tighten it. I dont know how to get to what secures this bolt. Do I remove the taillight, tinware, etc.? or do I need to make up a supporting bracket? Is the securing nut internally welded? Looking at the current posted pictures of the new paint job I see the bracket is still on the body. Any tips would be appreciated
I seem to remember that mine has captive nuts inside the chassis rail. There was a piece of wire welded to each, and the wire was poking out of a nearby hole in the chassis rail. This is a common trick used by bodybuilders and panelbeaters. Locate the wire, spray some WD40 in the direction of the nut, let it soak for a while, hold the wire, and jolt the bolt.
Sounds like your wire might have broken off already, which makes life difficult. If you can't jam the nut with a tapered cold chisel or screwdriver, you'll have to blow the head of the bolt off with the gas axe or angle grinder and get a new nut and bolt.
Weld some solid wire to the nut so that you can hold it in place, and use silver or copper grease on the threads so it can't rust.