With a 6 DOF motion rig, all the cars shift and accelerate in a high realistic fashion, where as a driver you get crushed into the seat and each gear "lifts the hood" a little matching the visuals. The experience is completely engaging and immersive. EXCEPT, one car, the FX-17 rocks the rig back and forth with each gear in a very unrealistic manner, compared to other open wheel cars and or even iracing, AMS2. There is something fundamentally wrong with that car's driveline, or motion output, or suspension, etc... It's impossible to detect this issue unless you have a motion rig... Anybody else noticing this issue?
Since your motion is presumably reading from the suspension data etc can you look at the telemetry traces via 2nd monitor or similar and see what is happening?