<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">No, ZDDP is not necessary in the transmission. Its function in the engine is to lubricate the tappets.<div class=""><br class=""><div class="">
<div class="">--</div><div class="">Max Heim</div><div class=""><a href="mailto:mvheim@sonic.net" class="">mvheim@sonic.net</a></div><div class=""><br class=""></div><br class="Apple-interchange-newline">
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<br class=""><div><blockquote type="cite" class=""><div class="">On Jan 28, 2020, at 11:40 AM, Michael MacLean via Mgs <<a href="mailto:mgs@autox.team.net" class="">mgs@autox.team.net</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class=""><div class="yahoo-style-wrap" style="font-family:times new roman, new york, times, serif;font-size:16px;"><div dir="ltr" data-setdir="false" class="">I know all the manuals say to use 20w-50 motor oil for the transmission. Most of those manuals were written back when Castrol GTX 20W-50 was formulated differently. Does the new lower ZDDP content make a difference in the transmission? I have a regular 4-speed trans in my 69 GT. The car is new to me and I would like to start from scratch with all the fluids in the car. Probably not a good idea to even get into what engine oil to use.</div><div dir="ltr" data-setdir="false" class="">Mike MacLean<br class=""></div></div></div>_______________________________________________<br class=""><br class=""><a href="mailto:Mgs@autox.team.net" class="">Mgs@autox.team.net</a><br class="">Donate: http://www.team.net/donate.html<br class="">Suggested annual donation $12.75<br class=""><br class="">Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive<br class=""><br class="">Unsubscribe: http://autox.team.net/mailman/options/mgs/mvheim@sonic.net<br class=""></div></blockquote></div><br class=""></div></body></html>