was driving my 05 gt yesterday and noticed a springy sound from the engine ( every 7 or 8 seconds you could here this sound.) so i pulled over and opened the hood . i noticed everytime the sound came that the adjustment arm or tentioner arm for the serpentien belt would move. im assuming somekind of clutch ? so i took the car to the dealer and showed a service guy the problem. he confermed it was the a/c clutch moveing and that it was normal operation. i looked inside and found that i had only defrost on , no a/c. he said that they are both tied together .hmmmm ok. he then said that some make more noise than others . hmmmm ok. my problem is do i hav to listen to this sound everytime i use the a/c and defrost. this is very disturbing to me! also annoying to say the least cause this sound is loud. anyone else hear this same thing and if so your thoughts? im taking to service manager on monday but would like some ammo. before i talk to him.pease dont say turn shanker 1000 volume up , though that is a solution, cause i do like to listen to my cars engine sometimes too. also anyone know were fluid fill for 5sp manual transmission is? , i was told its a self contained system , but sometimes it shifts harder than other times , well youall know cluckity clunk clunk. lol. thx vynle.