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<DIV>This foaming is with NON detergent SAE 30 oil ...</DIV>
<DIV>rg</DIV>
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<DIV style="font-color: black"><B>From:</B> <A
title=tahoehealey@hotmail.com>Richard Kahn</A> </DIV>
<DIV><B>Sent:</B> Friday, February 24, 2017 12:57 PM</DIV>
<DIV><B>To:</B> <A title=healeys@autox.team.net>Healey List</A> ; <A
title=roggrace@telus.net>Roger Grace</A> </DIV>
<DIV><B>Subject:</B> Re: [Healeys] Trans oil foaming</DIV></DIV></DIV>
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<P>The detergent foams when agitated. It is designed to hold particles in
suspension. It works well in engines not in the gear box. Use 30 wt non
detergent or MT-90 by Redline. It has been said that the detergent attacks the
brass parts in the gear box. Also that the foam lowers the oil pressure needed
in the over drive valve.<BR></P><BR><BR>
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<DIV id=divRplyFwdMsg dir=ltr><FONT style="FONT-SIZE: 11pt" color=#000000
face="Calibri, sans-serif"><B>From:</B> Healeys
<healeys-bounces@autox.team.net> on behalf of Roger Grace
<roggrace@telus.net><BR><B>Sent:</B> Friday, February 24, 2017 8:18
AM<BR><B>To:</B> Healey List<BR><B>Subject:</B> [Healeys] Trans oil
foaming</FONT>
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<DIV>I recently had the OD on my BJ8 apart to replace some parts –
bearing/accumulator/gaskets/O rings etc.</DIV>
<DIV>For a first sort of sacrificial oil fill I decided to use a non detergent
Castrol 30 wt oil. Date codes less than 18 months old. Plan was to switch to the
expensive Redline MT90 after testing and after a few hundred miles. This 30 WT
oil is often recommended by OD experts. I have built an electric variable speed
rest rid to be able to test the transmission outside the car.</DIV>
<DIV>Overdrive worked fine and transmission sounded OK and ran it for about 2
hours to get the temp up (52C on OD case) and hunt for leaks.</DIV>
<DIV>So far so good.</DIV>
<DIV> </DIV>
<DIV>Then after a few days of standing, and 2 minutes of running, I drained the
oil (to fix a leak) and was amazed to see that the oil had foamed badly and
there were big classic fish eye bubbles on the surface of the oil. Ambient was
about 14C. I did note that the oil coming out of the transmission was somewhat
foamier than that from the overdrive drain plug.</DIV>
<DIV>See enclosed pix.</DIV>
<DIV>After standing overnight the oil looked normal again.</DIV>
<DIV> </DIV>
<DIV>What disturbs me is that unless I had drained the oil I would not have been
aware of the foaming and put it into service .... </DIV>
<DIV>Have now replaced with the MT90 that shows no sign of foaming on the dip
stick.</DIV>
<DIV>Wonder if others have any ideas about this weird phenomenon and is it
a concern ?</DIV>
<DIV>rg</DIV>
<DIV> </DIV>
<DIV> </DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV><A></A>
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