so i just got this a couple days ago, 0 miles, and ive already experienced some onboard computer issues, already poasted about it, but i was wondering as well when im cruising at like 50 and slowly stop for a light or going up a hill but slowing down, in D mode i feel the transmission when it shifts down, im pretty sure it shouldnt be noticeable, but in DS mode its much lighter than when in D mode when it happens, would it require a ECU reflash?