New Clutch slipping under load...WAS: [DeTomaso] NPC - Clutch Disengagment

Tue Sep 5 16:49:14 EDT 2006

Thomas,
  Clutch hasn't seen anything close to load....when I say it started to slip under load I am talking maybe 3500 R's max....Two weeks ago after the initial ;engine breakin I took it for a cruise. But noticed problem with getting Pantera in gear which only seemed to get worse until we changed master and clutch last week so yesterday was my first chance to drive the Pantera again so there are few street miles on the engine, clutch or flywheel.

After we installed the new master and slave cyl and drove it yesterday I noticed clutch  starting to slip on acceleration ....immediately backed off....Engine hasn't dropped any oil (as of yesterday) but will check again tonight when I go home.....

  Again, no problem getting gears...no grinding either.
  Hope it is a temporary problem....will have Dick check adjustment and slave and clutch travel tomorrow.
  THANKS
  md
Thomas Tornblom <Thomas.Tornblom at Hax.SE> wrote:
  I think the new clutch needs to be babied a bit when new.

Centerforce said that one should not use full power the first few 
hundred miles, but lots of stop and go. This would apparently mate the 
surfaces properly so that they hold up properly later.

Cheers,
Thomas

Mad Dog Antenucci wrote:
> Will, Motown, Curt, All,
> 
> I have another problem now...I had the same problem as Motown had and it turned out to be the "master cyl" after replacing the engine,flywheel and clutch....After installing a new master and clutch slave and readjusting linkgage last week the gears and linkgage is right on....BUT when I took the car out on the road
> 
> I noticed that the clutch now wants to slip 'under load' like its partially engaged ....again the flywheel and clutch are new so I think its an adjustment issue but just don';t know where to adjust. The clutch engagement is set pretty short to the floor...perhaps too short?
> 
> MD
> 
> Will Kooiman wrote:
> I'm just guessing here, but the release fork needs to move about 2" when
> measured where the slave attaches to the release fork. I'm not sure where
> the 1/10" is measured, but I doubt that's enough.
> 
> -----Original Message-----
> From: detomaso-bounces at realbig.com
> [mailto:detomaso-bounces at realbig.com]On Behalf Of Paul Timko
> Sent: Monday, September 04, 2006 9:55 PM
> To: MikeLDrew at aol.com
> Cc: detomaso at realbig.com
> Subject: Re: [DeTomaso] NPC - Clutch Disengagment
> 
> 
> He says the pedal is heavy and the motion is similar to when it was
> working, so I would believe that it isn't air in the system. While it
> is difficult to measure the amount of movement at the clutch disc, he
> believes it is approximately 1/10". I would suspect that this is enough.
> 
> Thanks
> Paul
> #9270
> 
> MikeLDrew at aol.com wrote:
> 
>> In a message dated 9/4/06 19:25:16, thedrol at pobox.com writes:
>>
>> << He checked and he is getting movement at the slave cylinder. There is
>>
>> a big lever arm that runs into the bell housing and that is moving too. >>
>>
>>
>>
>>>>> But is it moving ENOUGH, that's the question. Although the parts are
>>>>>
>>>>>
>> different from the Pantera, the idea is the same--master cylinder actuates
> slave
>> cylinder, which moves a lever which released the throwout bearing. Just
> like a
>> Pantera, if you get a bunch of air in the system, clutch master cylinder
>> movement will compress the air and you will only get a little bit of
> movement (or,
>> more precisely, not enough movement) at the slave cylinder, and thus the
>> clutch won't disengage properly.
>>
>> Another possibility is that the clutch master (or slave) is shot and
> leaking
>> internally.
>>
>> It's also remotely possible that the clutch is sticking, but I wouldn't bet
>> on that one.
>>
>> Mike
>>
>>
>>
>>
> 
> 
> 
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-- 
Real life: Thomas Törnblom Email: Thomas.Tornblom at Hax.SE
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