Ferrari Mailing List: Re: Gearbox lubricants

(continued)

Hey Charles,

   Let me take a crack at it.  I assume you're asking about "clutch 
chatter"?  It's the only chatter I've heard which refers to a transmission.
   Assuming that's correct - a clutch chatters when the clutch disc doesn't 
grab the flywheel completely but instead, skips across the surface grabbing, 
then releasing rapidly over and over.  It producing a bump, bump, bump, 
bump, bump, bump kind of sound & feeling - which happens *very* rapidly. 
Also, it happens as the clutch is released - meaning the clutch is lifted 
from the floor allowing it to engage.   In my experience, the chatter (or 
judder as it is sometimes called) stops when the pedal is fully out.
   Does that help?  I'll give it some thought and see if I can come up with 
a better way to describe it.
How about this - picture a gear turning rapidly and sometime is trying to 
mesh with the gear but instead of meshing it bounces off the gear preventing 
it meshing??
How about that?
Sometime a chatter/judder is caused by contamination on the clutch disc or 
possibly the flywheel is warped although a warped flywheel often causes more 
drastic symptoms.
Larry T (67 MGB, 74 911, 78 240D, 91 300D)

www.youroil.net for Oil Analysis and Weber Parts

Test Results http://members.rennlist.com/oil

PORSCHE POSTERS!  youroil.net

Weber Carb Info http://members.rennlist.com/webercarbs

Porsche Road Test http://members.rennlist.com/roadtest/

.

----- Original Message ----- 
From: "Charles G Perry IV" <charles [at] carolina-sound.com>

To: "Larry Turner" <l02turner [at] comcast.net>

Cc: "'The FerrariList'" <ferrari [at] ferrarilist.com>

Sent: Friday, February 02, 2007 3:33 PM

Subject: [Ferrari] Gearbox lubricants
I'm sure this is hard to describe without actually experiencing it, but 
can

someone describe in detail what exactly the chatter is and/or what it 
feels

like in practice?
I'm having some continuing gearbox issues with my TR and after having had

two good mechanics check it with minimal improvement, my next thought was 
to

buy several different recommended oils and test each of them to see if any

of them help, but aside from the smoothness in shifting I'm not sure what

else to watch for to judge their performance.
Thanks!
-- charles

----- Original Message ----- 
From: "Jeff Greenfield" <coyote [at] acme-ltd.com>

To: "Charles G Perry IV" <charles [at] carolina-sound.com>

Cc: "'The FerrariList'" <ferrari [at] ferrarilist.com>

Sent: Friday, February 02, 2007 10:13 AM

Subject: Re: [Ferrari] Early 308s and then some

<For those unfamiliar with Redline products
http://www.redlineoil.com/products_gearlubricants.asp?productID=38&subCatego
ryID=15&categoryID=6
The recommended gear oil for Ferrari (by Redline and most Ferrari techs)
is
the 75w-90 NS.  For particularly troublesome shifting Ferraris, use MTL.>
I'll second the 75w90NS in transaxle cars.
If you experience chattering of the LSD with the NS, you can add a very
small amount of their friction modifier, something like 1-2 ounces should
be
enough, but I'd have to check my notes to be sure.
I'm not sure about the MTL (or its heavier cousin MT90) as these are

non-hypoid oils. I've never been able to get a definitive answer as to

whether or not the Ferrari transaxle requires a hypoid oil or not, but 
was

under the impression that they did.
Anyone know for sure?
Jeff
-----Original Message-----
From: Paul Bennett [mailto:pbennett [at] macnet.com]
Sent: Thursday, February 01, 2007 11:52 AM
To: dave [at] davehanda.com
Cc: The FerrariList
Subject: Re: [Ferrari] Early 308s and then some
...Mine was extremely reliable and never had the 2nd gear issue. I could

shift into second normally even in winter with Redline synthetic.
Samo samo here - Redline puts the cold 2nd shift to bed forever.
Extingusher on board

That's to impress the chicks.  HOT car.
Oh yea they leak

My GTB has yet to leak.
*********removing tongue gently from cheek he continues***************
That NZ fellow asking recommendations about which model should probably

consider the 512bb(i).

Now there's a performance car with the 308 look.

My virgin Ferrari lust was Testrossa but after learning more about them

the

512 became my real heart's desire.

Would still trade my 308 for one today fully knowing the maintenance 
bills

would probably double (?triple?)

Raw performance.  Clyde, do you still have one?   They're truely a rare

model that I've not seen on the road.

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Re: Gearbox lubricants	<– Date –> <– Thread –>
From: LarryT (l02turnercomcast.net)
Date: Fri, 2 Feb 2007 13:04:29 -0800 (PST)