reversed ffb problems?

[Bez]

When stationary Im feeling the wheel moving from left to right in a similar manner to how a mod with broken ffb acts in GSCE? best way to describe it is as if one of the forces is pulling instead of pushing, not the full whip effect you get with reversed ffb in a broken mod but theres something odd there.
Im using a t500 with the latest firmware/drivers in windows 8.1 x64.

 

[Peter]

I have the same wheel and don't have this, maybe it's only engine vibration

 

[Bez]

ive got the engine vibration turned off in the ffb settings as it seemed a bit too high frequency in its vibration, i think it was giving me vibration white finger