So, I've been trying to pinout the issue, but I think I finally found the pattern. A few weeks back I started noticing some odd surging/hesitating when traveling down the highway. At the time seemed mostly when slowing down. But I decided to try to see if I can figure out when it shows up.

So far only seems to happen after having reached operating temp. If I drive nice and smooth, everything feels normal. But if I get on the pedal a couple times, it shows up.

What I experience is the car kind of bucking. It's most noticeable when trying to get going from a full stop. It will suddenly kick and chirp the tires. When cruising down the road, it feels like it loolses throttle then suddenly re-engages. However, if it's being experienced when overdrive would be engaged, turning off overdrives causes it to stop, and it will stop misbehaving for a short while once overdrive is turned on again.

Any thoughts on what this is?

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