[Matt Tillman]

I think the wobbling has to do with the rotation order.

To get around it you need to use both the “Particle Replicator” Rotation as well as the “Particle Look” Rotation.

Particle Replicator Rotation
Y = thisComp.layer(“Wheel_Orientation”).transform.yRotation+90
Z = thisComp.layer(“Wheel_Orientation”).transform.orientation[2]+90

Particle Look Rotation
Y = thisComp.layer(“Wheel_Rotation”).transform.zRotation

[Matt Tillman]

Thanks heaps Darby. I completely overlooked the fact that I was passing a frame value instead of time.