[DeTomaso] ommission - ZF gear oil weight

Mon Feb 9 23:14:01 EST 2015

I'll go with Leslie Gray's experience.  
Most GL-5 oils say "approved for use with limited slip diffs" on the bottle, which means they have the "extra slippery additives."  I guess if you could find some that didn't say that you could use it.

But the Redline is NOT that expensive, guys, and for most owners there is no reason to change it every year

Here's Leslie's email from a while ago:

The Red Line oil NSdesignation means that in this particular oil there is NO 
additive added to reduce the clutch chatter in most limited slip differentials.
Normally this additive is a good thing and almost mandatory in cars like the 
Corvette which has a fairly high degree of limited slip lock up. 
     Our cars have a two issues with these extra slipperyadditives. Number 
one is our diff uses a rather low limited slip lock up so this extra slip 
actually decreases what little lock up we have. Number two is this additivewill 
inhibit our synchro rings ability to do its job and in extreme cases will burn 
up the synchro rings and the towers on the gears costing big bucks. 
    I've rebuilt ZF's since the late 1970's and have replaceddozens of synchro 
rings & gear sets due to the use of these additives. 
  As Jack DeRyke says "your mileage may vary" !!!!

Leslie A. Gray

-----Original Message-----
From: Bill Moore <bill at incendium.com>
To: Robert W. Garven Jr. <robertgarven at earthlink.net>; DeTomaso List <detomaso at poca.com>
Sent: Mon, Feb 9, 2015 8:08 pm
Subject: Re: [DeTomaso] ommission - ZF gear oil weight

   Dennis Qellla,  PPC, uses Pennzoil 80W-90 GL-5

   Cheers,

   Bill Moore

   Incendium Supply

   Calgary

   -------- Original message --------

   From: "Robert W. Garven Jr."

   Date:2015-02-09 8:08 PM (GMT-07:00)

   To: DeTomaso List

   Subject: Re: [DeTomaso] ommission - ZF gear oil weight

   Friends,
   Is there a consensus on what brand type gear oil for the ZF. Im using
   redline in my F car and it is very nice.
   I assume the diff is in the box also and share lubrication, the Ferrari
   does not need a friction modifier as the
   diferential is similar to a Porsche design and the clutches work wel
   without it.  I use Redline 75/90 NS.
   Just curious what all you guys are using in your ZF's!
   Rob
   On Feb 9, 2015, at 5:04 PM, Larry Finch via DeTomaso
   <detomaso at poca.com> wrote:
     All,
     I just noticed I omitted a rather necessary bit of information.
     Gear oil weight should be 80W90.
     Larry
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      Friends,
      Is there a consensus on what brand type gear oil for the ZF. Im
   using
      redline in my F car and it is very nice.
      I assume the diff is in the box also and share lubrication, the
   Ferrari
      does not need a friction modifier as the
      diferential is similar to a Porsche design and the clutches work wel
      without it.  I use Redline 75/90 NS.
      Just curious what all you guys are using in your ZF's!
      Rob
      On Feb 9, 2015, at 5:04 PM, Larry Finch via DeTomaso
      <[1]detomaso at poca.com> wrote:
        All,
        I just noticed I omitted a rather necessary bit of information.
        Gear oil weight should be 80W90.
        Larry
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   References
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-------------- next part --------------
   I'll go with Leslie Gray's experience.
   Most GL-5 oils say "approved for use with limited slip diffs" on the
   bottle, which means they have the "extra slippery additives."  I guess
   if you could find some that didn't say that you could use it.

   But the Redline is NOT that expensive, guys, and for most owners there
   is no reason to change it every year

   Here's Leslie's email from a while ago:

   The Red Line oil NS designation means that in this particular oil there
   is NO
   additive added to reduce the clutch chatter in most limited slip
   differentials.
   Normally this additive is a good thing and almost mandatory in cars
   like the
   Corvette which has a fairly high degree of limited slip lock up.
        Our cars have a two issues with these extra slippery additives.
   Number
   one is our diff uses a rather low limited slip lock up so this extra
   slip
   actually decreases what little lock up we have. Number two is this
   additive will
   inhibit our synchro rings ability to do its job and in extreme cases
   will burn
   up the synchro rings and the towers on the gears costing big bucks.
       I've rebuilt ZF's since the late 1970's and have replaced dozens of
   synchro
   rings & gear sets due to the use of these additives.
     As Jack DeRyke says "your mileage may vary" !!!!

   Leslie A. Gray

   -----Original Message-----
   From: Bill Moore <bill at incendium.com>
   To: Robert W. Garven Jr. <robertgarven at earthlink.net>; DeTomaso List
   <detomaso at poca.com>
   Sent: Mon, Feb 9, 2015 8:08 pm
   Subject: Re: [DeTomaso] ommission - ZF gear oil weight
   Dennis Qellla,  PPC, uses Pennzoil 80W-90 GL-5

   Cheers,

   Bill Moore

   Incendium Supply

   Calgary

   -------- Original message --------

   From: "Robert W. Garven Jr."

   Date:2015-02-09 8:08 PM (GMT-07:00)

   To: DeTomaso List

   Subject: Re: [DeTomaso] ommission - ZF gear oil weight

   Friends,
   Is there a consensus on what brand type gear oil for the ZF. Im using
   redline in my F car and it is very nice.
   I assume the diff is in the box also and share lubrication, the Ferrari
   does not need a friction modifier as the
   diferential is similar to a Porsche design and the clutches work wel
   without it.  I use Redline 75/90 NS.
   Just curious what all you guys are using in your ZF's!
   Rob
   On Feb 9, 2015, at 5:04 PM, Larry Finch via DeTomaso
   <[1]detomaso at poca.com> wrote:
     All,
     I just noticed I omitted a rather necessary bit of information.
     Gear oil weight should be 80W90.
     Larry
   _______________________________________________
   Detomaso Forum Managed by POCA
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   To manage your subscription (change email address, unsubscribe, etc.)
   use the links above.
      Friends,
      Is there a consensus on what brand type gear oil for the ZF. Im
   using
      redline in my F car and it is very nice.
      I assume the diff is in the box also and share lubrication, the
   Ferrari
      does not need a friction modifier as the
      diferential is similar to a Porsche design and the clutches work wel
      without it.  I use Redline 75/90 NS.
      Just curious what all you guys are using in your ZF's!
      Rob
      On Feb 9, 2015, at 5:04 PM, Larry Finch via DeTomaso
      <[1][4]detomaso at poca.com> wrote:
        All,
        I just noticed I omitted a rather necessary bit of information.
        Gear oil weight should be 80W90.
        Larry
      _______________________________________________
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      To manage your subscription (change email address, unsubscribe,
   etc.)
      use the links above.
   References
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      2. [8]mailto:DeTomaso at poca.com
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