Originally Posted by higson
Just got my 2015 Summit 5.7 about 3 months ago (my first Jeep). Love the car overall, but the amount of bounce/wobble (not death wobble) I get when driving at low speeds over bumps is just way more than what I'm used to (granted I switched to the jeep from an Acura TSX).
Reading other threads, it seems like this is a design issue rather than a problem with my particular jeep.
I'd like to get to the root cause and then a possible fix:
* Is this caused by the QuadraLift?
* Is this caused by poor rear shocks?
* Is this caused by sway bars that aren't stiff enough?
In trying to research possible fixes, all I've come across is to replace the sway bars with SRT bars and links. I can't find aftermarket replacements for the rear shocks (fronts are a non-starter since they're integral with the QL system).
Anyone else experiencing this and/or found a fix?
What you pointed out is quite interesting. I may have a similar situation. Here is what I discovered in my Summit- mind you, this is coming from my personal perspective and maybe quite different from others.
1. The car is better at absorbing bumps and minor potholes at higher speeds than lower ones. The faster I go, the better it responds. At lower speeds, I can feel it a bit more- kind of a rickety, disjointed feeling.
2. It still takes regular bumps with better ease and comfort than many cars- suspension travel is good in normal ride position. It does not ride as smooth as a Caddy but it is quite responsive- tighter and sportier suspension- thanks to the Mercedes Benz foundation.
3. This is the one you may find in common: although it absorbs bumps decently, there is still a bit of a bouncy, jaunty ride especially when going over any kind of imperfection in the road. It is almost like a ship's movement rolling over rougher waves- you don't really feel the shocks impacting you like a lowered suspension in a sports car, but you feel the car in a "Rodeo" mode going from left to right in a smooth but totally bouncy way on roads that are not quite flat.
I am quite used to this by now and can live with it especially after coming from the Moton suspension of some Sports cars I have modded over the years. No matter what shocks or springs or coilover set-up you put on the Jeep, there is little improvement over this feeling (No.3) except in better times on the track! Tires can improve the ability to absorb a little more of the bumps, or give more feedback or less, or provide better cornering and lateral movement and grip, but does very little for this slight bouncy movement. It is part of the character of the Quadra-Lift suspension I guess. There are worst things that one can live with and this is just the nature of the beast.