Cannot locate a knocking noise coming from a 1999 GT Mustang - Ford Mustang Forum
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post #1 of 2 (permalink) Old 06-05-2010 Thread Starter
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99 YellowStang's Avatar
Joined: Oct 2009
Location: Longview
Posts: 116
Cannot locate a knocking noise coming from a 1999 GT Mustang

Ok, Ive always had a knocking noise coming from this car since I bought this car 8 months ago. I completely rebuilt the motor and it still had a knocking noise that would come and go. So I pulled it apart again thinking it was the timing chains slapping around.... Well thats not it.

It seems to be loudest when the car is idling and then it will be quiet for 50 miles and then it will start knocking again for like 5 mins. You can hear it better when you stick your head under the car verses when your over the engine compartment. It knocks if the clutch is engaged or not. It knocks if the belt is hooked up or not.

It is not a rod knock because they dont come and go. its not the lash adjusters or the cam followers. Not the timing chains, not the exhaust. Everything is good. So im 100% sure its not in the engine.

But for some reason I cant get a bolt in the top right of the bellhousing to block because it is offset. The 2 dowel pins line up and all the other bolts line up. Is it something in the transmission that would make a knocking noise. Why cant I get that bolt to line up? It was like that with the original block too. Are there different bolt patterns for the 4.6 motor? I have the windsor. I know the car should have a t-45 but how do I tell whats in it? Are all tranny bolt patterns the same?
Im so fed up with car its not even funny. All I want is the knocking sound to go away. Ive taken it to Ford twice and both times the noise isnt in it till I get home..

Most people would sell this P.O.S and move on but I really want to figure out this knocking noise.

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post #2 of 2 (permalink) Old 06-17-2010
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Joined: Apr 2010
Location: cumming
Posts: 411
I have been doing some checking into my trans issue and different sites talk about various noises from the trans. A knocking noise is one of the noises along with ticking noises and clunking. Could tjis be your issue?Good luck.

License and registration please.

Current rides:
2001 Mustang Gt- Performance Red
2004 Explorer Limited - Black
1999 Grand Am -Green
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