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Discussion Starter #1
Trying to grasp whether this is cause of concern or not...

Made a near-WOT 1-2 today.. I had heard this "squeak" before.. but it was so minimal I thought I was hearing things or maybe it was tire.. but what I heard today was fairly distinctive and definitely not tire. I reminded me of the same squeak I could hear when turning the driveshaft one way from underneath the car. Normal driving 1-2's are normal and firm. I thought I heard a smaller version of 'squeak' when it shift 2-3, today as well.. but I can't remember for sure. Thoughts?

Trans is recently J-Modded (mild w/gear) with Mark8 TC. Current chip tune has shifts fairly firm.
 

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my gatorback still squel during wot shift. my idler pullies are starting to make sound to, will change out that pulley and see if the belt slip will occur.
 

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its a very common thing with a n/a 4.6 engine. You can put underdrive pulleys on it to tighten it up or you can just live with it. My 95 did it all the time.
 

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Discussion Starter #8
Heh, I just wanted to make sure I wasn't looking at soon-to-be trouble. When I took out after putting in the converter jmod and gears.. when I hit it for WOT it chirped 1-2 quite nicely.. standstill no-brake burnout did good as well.. and for a while... near-WOTs I never noticed the sound.. couple times between then and now I had heard it ever so faintly. Today though was pretty noticeable so I took concern. I'll slip on a gatorback and see how she goes sometime later.
 

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Sophosis said:
Heh, I just wanted to make sure I wasn't looking at soon-to-be trouble. When I took out after putting in the converter jmod and gears.. when I hit it for WOT it chirped 1-2 quite nicely.. standstill no-brake burnout did good as well.. and for a while... near-WOTs I never noticed the sound.. couple times between then and now I had heard it ever so faintly. Today though was pretty noticeable so I took concern. I'll slip on a gatorback and see how she goes sometime later.

You sure it's not the tires?
 

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Yea, I'm pretty sure... since belts were mentioned it kinda clicked.. since it does sound very much like a squeaking belt. The tires never made that high pitched kind of chirpish squeaking noise when the barked 1-2. I had to pretty much hit WOT to get them to also.. I wasn't at full WOT when it squeaked so well this afternoon.
 

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Sophosis said:
Yea, I'm pretty sure... since belts were mentioned it kinda clicked.. since it does sound very much like a squeaking belt. The tires never made that high pitched kind of chirpish squeaking noise when the barked 1-2. I had to pretty much hit WOT to get them to also.. I wasn't at full WOT when it squeaked so well this afternoon.

Yeah, but did you just do the Jmod and gears?
 

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My 94 Mark VIII does it too. 6000 rpms.. eeeeeeeee shift.

Like a slight, and very quick high-pitched belt squeek.

but this is good! That basically means your tranny is shifting so fast, that the engine rpm drop is almost instant, and you get a slack-drop in the belt. This also happens on radically cammed motors when they are revved. the idle recovery is so instant, the belts often flap for a second If you give it a double-rap of the throttle, you can get a slight, and quick 'eek"

I have a brand new belt, and idler pulley. I havent heard the little "eeek" in a while. But, I'm sure it will be back.

Oh, and BTW, our 97 does it too...it has a SCT chip, so the shifts are a little quicker than stock...

sleep tight...its fine.
 

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Blackicelsc said:
My 94 Mark VIII does it too. 6000 rpms.. eeeeeeeee shift.

Like a slight, and very quick high-pitched belt squeek.

but this is good! That basically means your tranny is shifting so fast, that the engine rpm drop is almost instant, and you get a slack-drop in the belt. This also happens on radically cammed motors when they are revved. the idle recovery is so instant, the belts often flap for a second If you give it a double-rap of the throttle, you can get a slight, and quick 'eek"

I have a brand new belt, and idler pulley. I havent heard the little "eeek" in a while. But, I'm sure it will be back.

Oh, and BTW, our 97 does it too...it has a SCT chip, so the shifts are a little quicker than stock...

sleep tight...its fine.
It is a belt squeal. Goodyear gatorback!
 
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