hey just a question i have a 2002 2500hd with the 8.1 allison combo and it seems lately that it has been shifting not as smoothly as it did when i bought it i just did a trans fluid exchange along with the external and internal filters both oem and i was wondering if maybe it could be because i have a sound system and it draws alot of power which might cause the firm shifts but what i am not sure about is it feels like it shutters even when all my acessories are turned off so if you have any input on what cound cause these problems i would appreciate it thanks