
<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">For a diff new build Kas recommended a good break in period of about 100-150 street miles before any hard on-track running as I recall.<div><br id="lineBreakAtBeginningOfSignature"><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><br><blockquote type="cite">On Mar 11, 2025, at 9:43 PM, Greg Blake via Fot <fot@autox.team.net> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><meta http-equiv="content-type" content="text/html; charset=utf-8">We have experience with this on the Tx endurance TR6 car. Anything over a 30-45 sprint race and you need to be running full synthetic gear oil. If not, you will melt diff mounts, puke all gear oil out of the diff, burn up bearings…all sorts of failures that we had never experienced with vintage sprint races. <div><br></div><div>So if you plan on any endurance racing, go for the extra fluid capacity and use synthetic. If a road car or just sprint races, probably doesn’t mater. </div><div><br></div><div>Greg <br id="lineBreakAtBeginningOfSignature"><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><br><blockquote type="cite">On Mar 11, 2025, at 20:07, Dean Tetterton via Fot <fot@autox.team.net> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="ltr">So what did you do when it gets hot?<div><br></div><div>Dean</div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Tue, Mar 11, 2025 at 8:25 PM Hardy Prentice via Fot <<a href="mailto:fot@autox.team.net">fot@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>I used to run an electronic temp sender in the filler hole of my TR diff.</div>

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