<HTML><HEAD></HEAD>
<BODY dir=ltr>
<DIV dir=ltr>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'Comic Sans MS'; COLOR: #000000">
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV dir=ltr>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'Comic Sans MS'; COLOR: #000000">
<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></BODY></HTML>