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Tramlining (Tram-Lining - taken from Wikipedia because I got lazy): "Tramlining is the tendency of a vehicle's wheels to follow the contours in the surface upon which it runs. The term comes from the tendency of a car's wheels to follow the normally recessed rails of street trams, without driver input in the same way that the train does. The same effect is sometimes called Nibbling."
I get some tramlining in the Camaro. I believe it's due to having noticeably wider rear tyres. The 30mm difference between front and rear is a little over an inch, so noticeable.
Mentioning torque steer - that's more an issue for FWD cars. My Clio 172 Cup had it a little bit. It could technically happen in AWD and RWD cars, but not to the same extent. Best way I can describe that feeling is when you are accelerating a rear wheel drive car and you let go of the steering wheel, it pulls to the angle of the front wheels as they sit and drives straight from there. If you let go of the wheel in a front wheel drive car under those same conditions, it'll yank the front wheels to the angle of the rear wheels - straight ahead. Similar to coming into a corner too hard and locking the brakes up.
Question - when this lane switching happens, does the car actually accelerate, maintain a steady pace, or slow down? Rather than a slip, it sounds more like a lock to me - and I'd expect to see a sudden but slight drop in speed. The left of the car is locking up and that drag on the tyres is tugging the car to the left. The right is still moving freely, as it has no such resistance.
I'm assuming you've tried comp mode and completely disabled traction control to see if you have the same issue there? If the rear left brake was locking (or front left brake I guess) then it'd pull like that.
Just some thoughts. Good luck!
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