21-05-2018, 09:00 PM
(This post was last modified: 21-05-2018, 09:00 PM by Rogerfrench.)
It's a normal thing with 1/4 elliptics. As you reverse they try to dig in, raising the rear of the car. Then the tyres let go and the cycle starts over again. Even flattened springs won't totally cure it, but I found that slightly reversed springs did. I accomplished that by turning the main leaf upside-down.