<div dir="ltr"><div class="gmail_default" style="color:#3333ff">Tom--</div><div class="gmail_default" style="color:#3333ff"><br></div><div class="gmail_default" style="color:#3333ff">Its base--synthetic or dino--does not matter though I prefer the former.  However its GL rating DOES matter, and you should be using a diff lube with a GL5 rating which will better stand up to the shearing forces in the differential.  Engine oils or /GL4 transmission oils are not sufficient.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Aug 1, 2021 at 11:40 AM Tom Felts via Healeys <<a href="mailto:healeys@autox.team.net">healeys@autox.team.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div>BJ8-----I'm changing oil inn the diff and had some synthetic 75-140.  Is that OK to use there?</div><div><br></div><div>thanks'tom</div></div>_______________________________________________<br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><font color="#3333ff">Best--Michael</font></div>