One of the P38's useful traits that helps justify me keeping it around is its towing capacity. I have a 3T twin axle car transporter that i use infrequently, which goes nicely behind the P38.
The last few times i've had it out however, towing it has been bloody awful. When unloaded, the trailer seems to transmit some sort of vibration or oscillation into the car, which causes a vertical "jiggling" at a frequency which feels like someones shaking my internal organs to bits. Did 100miles in it on satruday, 80 of those unloaded and i was feeling verging on ill by the time i stopped after 40miles. I was having to sit forwards off the seat back to minimise the vibration. Road surface certainly played a role, with one section of road being incredibly bad, but the vibrations were there the whole time.
Now, i know the trailer hitch itself has some wear in it. The draw tube wiggles up and down inside its bore. I've been meaning to buy a new hitch for a while, but its expensive and hard to justify for something used so infrequently. The part i'm trying to figure out though is why its changed. The draw tube has always had this play in it for as long as i've had the trailer, but its never been that bad to tow with.
In the past, the hitch slack seemed to causes the trailer to sort of "kick" the back of the car when the trailer hit a bump or similar. Uncomfortable, loud and annoying, but not continuous. It would also get unsettled over uneven road and the hitch would kinda rattle and bang around, but again, it would only happen over the bit of rough road, not continuously for 40miles!
With the trailer loaded with a car it gets MUCH better, though its still not the most pleasant thing to tow, and it seems to like "snaking", not violently, but enough to mean that your sat there on red alert the whole time.
Anyway, enough waffling, i'm trying to figure out if ALL of this issue is with the trailer itself, or if the vehicle could be playing a part? Perhaps tired shocks or wear in bushes or something? Anyone experienced anything similar?