They could void your warrenty.. however i doubt they would.. its not like your runing N2o :rolleyes:
lol, its just a Cai... and cat back, that would be like voiding a warrenty for installing a K&N in the factory airbox, your dealer would have to be a total prick to do this....
Yes i would suggest you change the fluid and maybe get a freind who knows somethin about trannys to take it for a drive.. and verrify the problem.. if there is one..
Btw what color/smell of the tranny fluid?