Miata Mailing List: April 1994, Message #79
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   From: "Jyri J. Virkki" 
Subject: jacks (was re: Gearbox and Diff Oil)
   Date: Tue, 5 Apr 1994 16:13:02 -0400

Once upon a time Andy Poling said:
> 
> Netcom's still a headache...
> 
> ---------- Forwarded message ----------
> Date: Tue, 5 Apr 1994 12:33:14 -0400
> From:miata@jhunix.hcf.jhu.edu
> To: andy@jhunix.hcf.jhu.edu
> Subject: Gearbox and Diff Oil
> 
> 
> Rejected message sent to miata@jhunix.hcf.jhu.edu by NETCOM.COM!UUCP
> follows.
> -------------------------------------------------------------------------------
> 
> > I have had many replies as to the type of G/Box oil to use in preference to
> > Mobil SHC 75w-90.  Everyone seems to recommend AMSOIL or Redline none of
> > which are available in Australia any further suggestions.Only the large
> > companies oils such as Mobil, Castrol, Penrite, Agip, BP, Shell, Caltex,
> > Valvoline, STP are available.
> > A J K
> 
> I called up Redline, and they'll ship to you where ever you are (yes, even
> Aus).  All you need is your visa credit card and Redline's phone number out
> here in California
> 
> 	510 228 7576
> 
> 9:00 am (we just moved our clocks ahead one hour this weekend) here in 
> California is about 2:00 am in Sydney.
> 
> I just put MTL in my transmission and it's *great* !!  I can effortlessly
> down shift 2 to 1 at 20 mph (32 kph).  The 1-2 shift is pretty darn smooth
> (it just drops right in, no "click" like before), although the most
> dramatic difference is in the down shift between gears.
> 
> I also put 75W90 in my differential.  This is one very happy car (and
> driver ;-)
> 
> The MTL is reddish and feels about as thin as motor oil.  It doesn't even
> smell like tranny oil (must be because it is a GL-4 and not a GL-5 oil).
> Although the manual calls out 2.1 quarts of oil, I think I was only able to
> pump in 1.9 quarts.  I drove the car on the freeway and around town for about
> 30 minutes just before changing the tranny and diff oil to get the transmission 
> nice and hot and let it drain for at least 1 hour.  I'm wondering if some oil
> stays in the extension or in the shifter part of the tranny.  The car was
> level and resting on 4 jack stands...
> 
> The diff seemed to hold the 0.7 quart as the manual predicted.  The 75W90
> is golden, significantly thicker (harder to pump), and smells like gear
> oil.
> 
> I strongly recommend replacing the washers as the manual does ($0.85 each),
> the original washers were quite deformed.  I torqued the drain plugs to spec 
> (~ 35 ft-lbs / 45 N-m).  There is one washer on the tranny, and two (one drain,
> one fill) on the diff.
> 
> Although it is probably cheaper to buy local than from Redline, the oil is
> going to go about 30k miles (I can rationalize anything for my Miata).  Small
> price to pay each 2 years for smoother shifting.
> 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Eric Jacobs                              Internet:  ej@silma.com
>                                          Voice: (408) 725-8908
> SILMA Inc.                               Fax: (408) 725-8955
> 
> Maker of Virtual Worlds for Manufacturing and Hazardous Environments
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> 
> 
> 
> 
> 


-- 
Jyri J. Virkki - Linux: Choice of GNU Generation - DoD#0561