TwistedPhil
+1y
Buddy had a Ford Exploder with reverse triangulated with bags on lower bars, and it did the same thing- like the whole rear end was just flopping side-to-side! It turned out that the link cause the axle to rotate (almost like it was steering) when one side of the suspension compressed. As these were the drive wheels, it would cause the opposite wheel to try to "catch up", so the truck would swing the opposite way, and so on until you had to stop the truck to keep it from happening! Scary stuff- switching to over the axle put a band-aid on the problem, but of course running the bars the way they should be would have been better...
-Phil at FBI