<html><body><div>I'm pretty sure when they were driving down the expressway, reading the gauge, it was still happening. That was the reason for the test drive with the gauge attached, but I'll double check. I believe they checked the other things you mentioned, but again, I'll double check and forward your email to them.</div><div><br data-mce-bogus="1"></div><div>Thanks,</div><div><br data-mce-bogus="1"></div><div>Rye</div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div class="x-apple-signature"><pre style="font-family: 'SFNSText','Helvetica Neue', Helvetica, sans-serif; font-size: 15px; white-space: pre-wrap; word-wrap: break-word;" data-mce-style="font-family: 'SFNSText','Helvetica Neue', Helvetica, sans-serif; font-size: 15px; white-space: pre-wrap; word-wrap: break-word;">Rye
PH: 530-FIND-RYE</pre></div><div><br>On Jun 10, 2016, at 01:08 PM, TR3driver@ca.rr.com wrote:<br><br></div><div><blockquote type="cite"><div class="msg-quote"><p dir="ltr">If you really have 400 psi when the problem is happening (you didn't mention if they saw the problem while driving with the gauge attached), then IMO the problem is somewhere else. I drove for quite a few years on only 320 psi or so, and the only time it would slip was while shifting into 2nd gear under full throttle. It would shift and hold just fine in 4th gear (where the OD only has to handle half the torque of 2nd gear).</p><p dir="ltr">I'm not saying that it shouldn't be higher, only that I don't think that is the source of the symptoms you describe.</p><p dir="ltr">Did they check that the solenoid was continuing to draw current when the problem happens?</p><p dir="ltr">Have they checked the valve ball lift? The mechanism sometimes wears so the setting lever is no longer accurate. If the ball was not moving far enough, and there is a leak on the piston side of the pump (which might explain the lack of pressure), the operating pistons might not see the measured 400 psi.</p><p dir="ltr">-- Randall</p></div></blockquote></div></body></html>