Turned HSA off. Still have jumpiness/pulsing.

 

I have a 2012 Sport and haven't experienced this as yet.... Just as U stop,, fip the tranny out of gear and see if the shudder disappears... may be still locked up... I'm a great fan of Lucas oil for sticky transmissions... Cheers.

 

Oh yeah, it absolutely doesn't do it if it's in neutral. So, torque converter then?