[DeTomaso] Shifting

jderyke at aol.com jderyke at aol.com
Mon Feb 3 16:01:41 EST 2014


Everything back there gets hot. I recorded 180F lube temp in my ZF during a 5 hr run to 'Vegas one year. That hole (or holes if you have an early car) in the bellhousing is not for peering inside; its a cooling/ventillation port for the clutch. Plugging it with a piece of plastic is not a good idea except during work around the back end where things could fall inside. FWIW- J Deryke
 


I had a friends 72 that would loose slavetravel when it warmed up. It got so bad you had to double pump the clutch toshift when hot.
 
It turned out to be the clutch master, Idid not think it would get that hot in there.


 

 


 



From: DeTomaso[mailto:detomaso-bounces at poca.com] On BehalfOf Peter Cajthaml
Sent: Monday, February 03, 20142:23 PM
To: detomaso at poca.com
Subject: Re: [DeTomaso] Shifting

 

Following up on thisquestion from last week, as I also have problems shifting into reverse AFTERthe car has been driven for ~ 30 minutes (is well warmed up).  I have hadthe problem since I owned the car, and would really like to fix it this year.

It will always go intoreverse when the engine is off, so turning off the engine, shifting intoreverse is how I have been getting around the problem. Shifting into all othergears is smooth, whether going up or down.

I replaced a bad clutchslave cylinder about 5 years ago with the stock OEM unit.  I recently sawthat an upgraded stainless steel slave is available - would that improve thesituation?  If not, how do I adjust the clutch so it disengages completelywhen hot?  I plan to change the fluid and bleed the system again, but havedone so many times before without an improvement.

thanks for your advice,

Peter
#2761

coincidentally, Jay Leone, who posted the original question, was thefirst owner of #2761,  I bought it from him in  ~2006 (i think). HelloJay! I am finally getting around to changing the tires :)

------
<<more difficult in reverse before other gears.  I don't know why.  >>
 
 
Will, Reverse does not have a synchronizer, (synchro). Its job is to bring
the gear you are going into, to the matching speed so that the gear does not
grind. When a clutch is dragging a bit you over work the synchros to prevent
gear grinding. I think ZF synchros cost more then I make in a year.
 
 
Larry (shifty) - Cleveland
 
  
 
 
 
  _____  
 
From: DeTomaso [mailto:detomaso-bounces at poca.com] On Behalf Of Will Kooiman
Sent: Thursday, January 30, 2014 8:05 AM
To: Leonejay at aol.com; detomaso at poca.com
Subject: Re: [DeTomaso] Shiftiing
 
 
 
I would check:
 
 
 
Is the clutch fully releasing?  If not, you'll have trouble shifting, and it
will likely be more difficult in reverse before other gears.  I don't know
why.  Maybe the reverse shift is more complicated inside the ZF.
 
 
 
Try it with the engine not running.  Can you shift into reverse easier?  If
you can with the engine stopped, but you can't with the engine running, I'd
suspect the clutch.
 
 
 
And then, the next most obvious thing is adjusting the shifter.  Lots of
things to do there, and it is likely documented well on the various P-car
sites.
 
--
 
Will
 
 
 
From: <Leonejay at aol.com>
Date: Wednesday, January 29, 2014 11:10 PM
To: <detomaso at poca.com>
Subject: [DeTomaso] Shiftiing
 
 
 
I have a problem trying to shift into reverse. Need help. Thanks Jay
 
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Jay wrote:
 
       I have a problem trying to shift into reverse. Need help.?
 
 
>>>Need more info. ?What problem, specifically, are you having? ?Are the gears grinding? ?Will the lever not move over far enough to get it into gear at all? ?Can you get it into reverse with the engine shut off, but not with the engine running?
 
 
There are a dozen different problems that you could be experiencing, each with a different solution. ?Let us know *specifically* what your problem is, and we'll help you sort it out quick-style! :>)
 
 
Mike
 
 
  
 
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