I misspoke with "flush", I meant drain. Going to pick up a filter kit and fluid at NAPA and do it this weekend, winter work with no heat in garage isn't ideal!

That's putting it politely. :D

Still chasing the issue. I've narrowed down a specific time and can replicate the issue.
After 30mins or so of driving, above 45mph and under slight load, it creates the jerk. Might be time to take into a shop and see what they say, I'm out of options.

Something is getting hot, and giving an intermittent failure. Cam or crank sensor??

Might look into replacing both of those sensors. It's odd because on a cold start up, it has a similar symptom and rpms and throttle jumping till it warms up.

Use OEM sensors there. The aftermarket fellers don't always work as well. (in fact, they usually barely work at all.....)