Roxanne - budget milano/75 track car - Page 35 - Alfa Romeo Bulletin Board & Forums

  #511 (permalink)  
Old 01-06-2007, 08:07 PM
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Inside the transaxle At last track event I had someone roll halfway under there right after pulling off the track. His feeling was that it came from the transaxle itself... The dependency on both temperature and clutch load seems to indicate bearing? No? Could it be a marginal bearing that with play causes other things to touch when nice and warm and the load (from pressing the clutch) changes?
Jes
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  #512 (permalink)  
Old 01-06-2007, 08:15 PM
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Quote:
Originally Posted by AR4me View Post
Inside the transaxle. At last track event I had someone roll halfway under there right after pulling off the track. His feeling was that it came from the transaxle itself...
No, I don't think so. The noise would be damped by oil. Maybe in the clutch housing.

Quote:
Originally Posted by AR4me View Post
The dependency on both temperature and clutch load seems to indicate bearing? No? Could it be a marginal bearing that with play causes other things to touch when nice and warm and the load (from pressing the clutch) changes?
I think any bearing making that sort of noise would have self destructed by now.

It 'could' be the throwout lever, maybe.

But I still think something hitting a rotating part.
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  #513 (permalink)  
Old 01-06-2007, 09:03 PM
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Could be something in the clutch housing.
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  #514 (permalink)  
Old 01-06-2007, 09:04 PM
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I think any bearing making that sort of noise would have self destructed by now.
And mind you, it has been like this through an intense race weekend. Still acting the same way - no worse, no better. Yes, I believe it is from the clutch housing. I'll try lube the pivot fork, etc. but it is pretty much shooting in the dark.

Hmm, could it be the 4 puck race clutch? I bet you Andrew Garcia can pinpoint it - Andrew?

Jes
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87 Milano 3.0 Motronic - budget race car - [URL="http://www.alfabb.com/bb/forums/showthread.php?t=27358"]Roxanne[/URL] - SOLD
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(Repeating what I suggest or do, is at your own risk - be critical)
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  #515 (permalink)  
Old 01-06-2007, 09:18 PM
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oooh 4-puck clutch.... is it sprung or not? Is it hard to drive on the street?
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  #516 (permalink)  
Old 01-06-2007, 09:58 PM
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You can drive it on the street, but I don't see why - no limo take offs. I would get something like the 8 puck CF from performatek for street use if the engine power makes the stock clutch impractical.
Jes
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87 Milano Verde - daily driver - [URL="http://www.alfabb.com/bb/forums/showthread.php?p=363643#post363643"]Juliet[/URL] - SOLD
87 Milano 3.0 Motronic - budget race car - [URL="http://www.alfabb.com/bb/forums/showthread.php?t=27358"]Roxanne[/URL] - SOLD
87 Milano 3.7 24v - race car - Running again after 3 year hibernation...
(Repeating what I suggest or do, is at your own risk - be critical)
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  #517 (permalink)  
Old 01-06-2007, 10:16 PM
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Ok, I found something that could be the source of the ringing noise. If you look at the exploded picture below and focus on the area of the fork. Look for part #20, the "spherical pin". You'll see a washer between the spherical pin and the housing. I'm pretty sure I can rotate that washer with my fingers through the opening for the fork I'm sure it should be tight. I will see if I can get a tool on the sperical pin through the fork opening and tighten it.

What do you guys think? Sounds plausible?

BTW, Craig, your site is an excellent resource.

Jes
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87 Milano 3.7 24v - race car - Running again after 3 year hibernation...
(Repeating what I suggest or do, is at your own risk - be critical)
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  #518 (permalink)  
Old 01-06-2007, 10:40 PM
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Thanks Jes,

Plausible? yes.

I assume it's dry and rattles freely?
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  #519 (permalink)  
Old 01-06-2007, 10:52 PM
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Dry? Yes. Rattles freely? Hard to tell. I could barely get a finger on it, and rotate it. When the fork pivots around the spherical pin the load changes and perhaps, if a bit loose, it will rattle freely. It is somewhat hypothetical. Though, I just had Colin look at a transmission we have apart in his garage, and he could actually loosen the spherical pin by hand Is that normal?

Anyway, I will see if I can tighten it through the opening for the fork, without disconnecting anything. Though, the fork may put load on it, making turning the it difficult... Also, the fork may obstruct access to turning the pin through the opening. I would then have to disable the clutch slave and remove the fork. If that isn't enough, I guess I will have to remove the clutch cover and clutch.

Jes
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87 Milano 3.0 Motronic - budget race car - [URL="http://www.alfabb.com/bb/forums/showthread.php?t=27358"]Roxanne[/URL] - SOLD
87 Milano 3.7 24v - race car - Running again after 3 year hibernation...
(Repeating what I suggest or do, is at your own risk - be critical)
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  #520 (permalink)  
Old 01-06-2007, 10:54 PM
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The thing is I already have a 4-puck bought a long time ago. Does it just take some getting use too? Is it difficult to modulate?

I am thinking of a lightweight rear flywheel as well.
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  #521 (permalink)  
Old 01-06-2007, 11:01 PM
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You'll get used to it, but it is somewhat on or off. Slow engagement will cause chatter.
Jes
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87 Milano 3.0 Motronic - budget race car - [URL="http://www.alfabb.com/bb/forums/showthread.php?t=27358"]Roxanne[/URL] - SOLD
87 Milano 3.7 24v - race car - Running again after 3 year hibernation...
(Repeating what I suggest or do, is at your own risk - be critical)
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  #522 (permalink)  
Old 01-06-2007, 11:06 PM
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Well I guess I need to sell it then. I wonder if Fortis would be interested .
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  #523 (permalink)  
Old 01-06-2007, 11:09 PM
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He might be. I'll ask him.

Though, you only notice the on-off thing (and chatter) when starting from a dead standstill.

Jes
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87 Milano Verde - daily driver - [URL="http://www.alfabb.com/bb/forums/showthread.php?p=363643#post363643"]Juliet[/URL] - SOLD
87 Milano 3.0 Motronic - budget race car - [URL="http://www.alfabb.com/bb/forums/showthread.php?t=27358"]Roxanne[/URL] - SOLD
87 Milano 3.7 24v - race car - Running again after 3 year hibernation...
(Repeating what I suggest or do, is at your own risk - be critical)

Last edited by AR4me; 01-06-2007 at 11:13 PM.
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  #524 (permalink)  
Old 01-06-2007, 11:23 PM
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Jes, is yours sprung? I think Zamani's is a sprung 4 puck, and those don't seem to be quite as bad.
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  #525 (permalink)  
Old 01-07-2007, 05:08 AM
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Jes,

It seems like more noise than that small washer would make.

My vote is with the clutch/throwout bearing.

Great thread by the way - I've been following closely!

Dave
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