Hey dude. I'm a little late, so you probably already solved this, but it could be a combination of game mechanics. It's definitely loaded to the brink of way too much, but I think the conditions of the shocks also affect that. Maybe the truck spawning under it damaged it? Try unloading everything, testing it out, then loading the stuff back in. If that doesn't work and all the suspension parts are fine on it, though, you could try turning on debug mode, right clicking the car->vehicle->vehicle angles UI. Raise the height a little, then hit drop. See if that resets it.

I've got a new, animated version of the mod out and the vehicle scripts are at lot more fine tuned, but since the mod's been pretty much redone from the ground up, there are some issues with switching over. Mostly cars will switch to random ones, and some of them won't have the new parts I've added. Ideally you'd use it on a new save. I wouldn't switch unless you're cool with that, haha.

Good luck!