I have an 08 mustang gt manual earlier this week i started my car and it began to make a knocking sound and then goes away but it only does it when i start it now have any of you had this p4oblem or may know what it is

 

Assuming you are checking oil and using a good grade?
Hope it is not valves or something more serious.
Do you know a mechanic or someone extremely knowledgable?

 

Yea I use royal purple and change it every 7000 miles

 

It's really hard to diagnose engine noises over the web but maybe if you could take a video of it making the sound we could be of more help?

 

Yea sure ill take one and its coming from the dashboard

 

Its coming from the dashboard and I don't know how to upload the video

 

Upload it to YouTube then link it here?

 

Could be your TOB. Does the clutch change the noise?

 

Could be your trans as well


This is my trans falling apart, lol it still drove fine, just the 1-2 synchro went bad and started destroying everything in the trans

 

Holy **** man! That sounds like a helicopter! Hahaha

 

Got a brand new trans for that lol if your car grinds 1-2 even with the clutch to the floor your on borrowed time

 

Its not from the trans in only when I turn my key to the ON position it seems its comeing from the dashboard

 

Wait so is it not coming from the engine then? As in, does it do it when you turn key to on but do not start the car? Because that's totally different. I think most of us were thinking on a totally different line.

 

My girlfriends ford five hundred does something like that. Something to so with the air conditioner I think. No clue what lol I know I'm no help

 

No they said its coming from the air condition I might be the motor that controls the air I'm guessing

 

Quick online search revealed its PROBABLY one o these

http://m.mustangforums.com/forum/sho...1&postcount=13

 

This may help too


http://m.mustangforums.com/forum/sho...d.php?t=680494

 

If could be the mode door actuator, the blend door motor, or the blower motor. If its one of the first two, its like a 6-8 hour job usually. The whole dash normally has to be removed.

 

my wife's flex started making that sound. it was blend air door flapping, as long as we never turned the fan off it would not make the sound you are refering too. took it in and was fixed under warranty so don't know how much but they fixed in half a day.

 

Mine also does it when I swith to defrost or max ac