transmission modulator
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Senior User
Joined: Dec 2003
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From: Washington State
transmission modulator
Where is the transmission modulator located on my 94 awd aero. I have read that if these leak and your engine sucks in fluid you will develop a knock. I have been trieng to pinpoint a mysterious knock on my motor, more like a collapsed lifter noise that goes away when its put in nuetral or park. It's not the tranny.. 600.00 later and parts I didn't need, or the heads, 1.500 later
Post Fiend
Joined: Apr 2005
Posts: 5,720
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From: Washington state
has the mechanic checked the flex plate that the TC mounts to and the crankshaft spacer between crank and TC...
when in park and N all strain is off both parts
both crack and break especially on the high torque high vibration 4.0L OHV
half way down page
http://www.transmissioncenter.org/a4ld.htm
when in park and N all strain is off both parts
both crack and break especially on the high torque high vibration 4.0L OHV
half way down page
http://www.transmissioncenter.org/a4ld.htm
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Senior User
Joined: Dec 2003
Posts: 222
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From: Washington State
Yes that was all replaced via the 600 even the tc and starter at the tranny shop. they said it was not in the tranny. Someone suggested that it could be a pilot bearing that fits in the crank?? Thanks for the link.
Last edited by 9d4; Jan 28, 2007 at 06:46 PM.
Lead Driver
Joined: Sep 2003
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From: SoCal
The automatic transmission does not use a pilot bearing; that's only used with a manual transmission to support the nose of the input shaft.
Did you try using an engine stethescope or a short length of hose to try to localize the noise?
Did you try using an engine stethescope or a short length of hose to try to localize the noise?
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
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Senior User
Joined: Dec 2003
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From: Washington State
xlt4wd90 Thats what I thought. I know on my GTO for my 4 speed I have a pilot bearing in my crank. But I figured he knew something I didn't
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