- Nov 13, 2017
- 20 miles from somewhere.
- Mahindra 2565
I had a similar issue on a 20' heavy duty bumper pull trailer. The dealer and I fought it for 2.5 years. We changed, rotated, and balanced tires several times and none of that solved the problem.
I was ready to trade the trailer, when my dealer called the factory to see if they could help. It turns out the bolt that the spring is supposed to rest on had been tightened too much and the spring could not rest on the bolt. After we opened up the shackle and allowed the spring to rest on the bolt, the bouncing went away.
In this picture taken before we opened up the shackle, you can see at the red arrow that the shackle is squeezed just a little and did not allow the spring to rest on the bolt.
View attachment 684992
I'm trying to reason out what you are saying but I'm not having much luck at it. The bolts only purpose is to keep the spring from coming out of the shackle, not to hold up the spring. Maybe the bolt was tight enough to squeeze the shackle into the sides of the spring?
I'm sure I am missing something.