I've noticed a somewhat disconcerting "kick" in my 09 SE 4X4. I'll be driving normally in 2WD at like 60kmph and out of nowhere the truck will kick or buck forward. It almost feels like when you have wheelspin and then it suddenly grabs traction. Except there isn't any wheelspin and I'm not on what I'd consider a low traction environment. Its happened a few times, on a wet road but I can't replicate the feeling. It's completely random. AFAIK my truck doesn't have VDC or any type of traction control beyond the factory LSD. Is this something possibly failing in the driveline, or something else entirely?