<html><body>Those higher pressures show a healthy OD and you are probably using the modern rubber O-rings rather than the steel originals. However, one thing to check is the bleed down-release of pressure. If after stopping the unit the pressure should slowly leak down to 0 and/or if you worked the lever a few times it would bleed out. If that does not happen, there is dirt in the operating valve passage and must be cleared to function properly. If left unattended, the unit will not come out of overdrive and if the vehicle is backed up, damage would be done to the unit. Hank<br><br><div class="reply-new-signature"></div><p>-----------------------------------------</p>From: "John and Kerry Rowe" <jtkarowe@gmail.com><br>To: "David Wirken"<br>Cc: healeys@autox.team.net<br>Sent: Wednesday August 9 2023 12:50:16AM<br>Subject: Re: [Healeys] Overdrive pressures<br><br>
<div dir="ltr">I would be very happy with those pressures. I
wish!</div>
<br><div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Tue, Aug 8, 2023 at 1:39 PM
David Wirken via Healeys <<a>healeys@autox.team.net</a>>
wrote:<br></div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px .8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;">
<div dir="ltr">Recently overhauled OD when testing the
pressure, it measured 500 to 550 psi on the gauge.The book says it
should be 470 to 490 PSI and drops about 80 PSI when engaged
or disengaged and jumps back up to 470 PSI very quickly.
<div>Question is " should I be concerned about the high numbers I
am experiencing ?</div>
<div><br></div>
<div>THANKS for your input</div>
<div><br></div>
<div>Dave</div>
</div>
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