[DeTomaso] ZF gear oil

L GRAY tipo874a at msn.com
Fri Apr 18 14:44:37 EDT 2014


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 fold 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 extreem 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

> On Apr 18, 2014, at 12:56 AM, "John Donahue" <demongusta at me.com> wrote:
> 
>   NS =  non-synthetic?
> 
>   On Apr 18, 2014, at 12:53 AM, John Donahue <[1]demongusta at me.com>
>   wrote:
> 
>   Begin forwarded message:
> 
>   From: Jack Donahue <[2]demongusta at gmail.com>
>   Date: April 18, 2014 at 12:48:06 AM PDT
>   To: Jack Donahue <[3]demongusta at me.com>
>   Subject: Fwd: [DeTomaso] ZF gear oil
> 
>   Begin forwarded message:
> 
>   From: Jack Donahue <[4]demongusta at gmail.com>
>   Date: April 17, 2014 at 6:24:08 PM PDT
>   To: Jack Donahue <[5]demongusta at gmail.com>
>   Subject: Fwd: [DeTomaso] ZF gear oil
> 
> 
> 
>     But the best oil for the ZF is Red Line 75W90NS--- the NS signifying
>     "not so slippery" I presume.
> 
> 
> 
> 
> 
> 
>      The manual specifically calls for SAE 80, AP GL5
>      (SAE 90 in Europe).
>      7 1/2 pints of the stuff.
> 
> 
> 
>      The only place I have reliably
>      found GL5 is NAPA auto parts; it is made by Sta-Lube/CRC.
> 
> 
>     Here is the exact link to what you should buy:
>      [3][6]http://www.crcindustries.com/ei/product_detail.aspx?id=SL2473
> 
> 
>     It is normally sold in pints or gallons; since you need 7.5 pints
>     and
>      there are 8 pints in a gallon, obviously it is to your advantage to
>     buy
>      a gallon jug.  My local NAPA store used to carry them, but I just
>     had
>      to order a jug a couple of weeks ago as they only have pints now.
>      While you're at it,  you might as well buy a gear oil pump, also by
>      Sta-Lube:
>      [
> 
>     4][7]http://www.crcindustries.com/ei/product_detail.aspx?id=SL4344
> 
> 
>     Harbor Freight has a better picture of it:
>      [5][8]http://www.harborfreight.com/sta-lube-gear-fluid-oil-pump-407
>     14.html
> 
> 
>     Using this pump has transformed my life.  Normally filling a ZF
>     gearbox
>      is a painful experience involving a lot of spilled gear oil and
>      profanity.  This turns it into a breeze.  Just put the end of the
>     hose
>      in the side of the gearbox (where it's cleverly retained), and
>     start
>      pumping until you feel silly.  When oil starts drooling out the
>     side,
>      you're done.  Let it sit for a few minutes, give a few more pumps
>     just
>      to be sure, then you're really done.
> 
> References
> 
>   1. mailto:demongusta at me.com
>   2. mailto:demongusta at gmail.com
>   3. mailto:demongusta at me.com
>   4. mailto:demongusta at gmail.com
>   5. mailto:demongusta at gmail.com
>   6. http://www.crcindustries.com/ei/product_detail.aspx?id=SL2473
>   7. http://www.crcindustries.com/ei/product_detail.aspx?id=SL4344
>   8. http://www.harborfreight.com/sta-lube-gear-fluid-oil-pump-40714.html
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