Hey fellow vq owners , so I own a 2003 g35 sedan with and automatic, and I've been noticing that when ever I begin to accelerate I feel it begin to shift and and shifts way before it needs to, it only does this in regular drive but if I put it in manual mode , it drives without struggle, I think it may spark plugs but I could be way off. If any one can help out it would be greatly appreciated

Josh, welcome to the forum.

First, I'll move your post to the G35 forum so you can get input from members who have more relevant experience with the car.

Also, does it seem to slam or lurch into gear when this happens?