<div>Before pulling the tunnel cover I would check for positive operation of the relay-on the bulkhead for BJ8-it should give an audible click-if it vibrates replace it.</div>
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<div>If relay is OK, now is the time to lift the tunnel cover. Soleniod should have a loud snap when engaged-does it feel hot? 1.6A draw normal 18A+ replace. While there be sure to check oil level. Low oil will make the unit inoperable.</div>
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<div>Pressure of 400 on the later Overdrives is marginal. I would have hoped for more (450-500). It often depends on if you are using steel piston rings or rubber O-rings and if both acculumator and inner piston were replaced. Remove the operating valve plug, spring and ball and see if oil is present.</div>
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<div>Check the operation of the lever from the soleniod. Initally put a 3/16" drill bit in OD lever and hole and set lever on solenoid so that about 1/4" space is below lever at plunger (see service book) that will get it close to correct. The arm can loosen up after repeated shifts.</div>
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<div>One other check is the actual OD fascia switch-make sure it closes in a positive way-worn out may take you out of OD-so can interrupter switch if worn. Hank<br>-------------------- <br><br>From: "Michael Salter" <michael.salter@gmail.com> <br>To: "William Atterbury" <watterbury@yahoo.com>, <healeys@autox.team.net> <br>Sent: September 17, 2026 at 4:27 PM PDT <br>Subject: Re: [Healeys] Seeking List Wisdom </div>
<div style="font-family: Aptos, Aptos_MSFontService, -apple-system, Roboto, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(33, 33, 33);">To positively determine if the problem lies with the operating system or the unit itself it's best to run it with the gearbox cover off and operate the checking lever. </div>
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<div id="divRplyFwdMsg"><strong>From:</strong> Healeys <healeys-bounces@autox.team.net> on behalf of William Atterbury via Healeys <healeys@autox.team.net><br><strong>Sent:</strong> Thursday, 17 September 2026 18:41:26<br><strong>To:</strong> healeys@autox.team.net <healeys@autox.team.net><br><strong>Subject:</strong> Re: [Healeys] Seeking List Wisdom
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<div><span style="font-size: 13px;">Hey Bob,</span></div>
<div><span style="font-size: 13px;">Doesn't sound like the pump - 400 psi is good, but this can be removed/resealed in situ.</span></div>
<div><span style="font-size: 13px;">Your clue would be that it might engage at high roadspeed but not at low.</span></div>
<div><span style="font-size: 13px;"> </span></div>
<div><span style="font-size: 13px;">I had a solenoid that was 'weak' and behaved like yours. It functioned, but resistance was high and pull force was low.</span></div>
<div><span style="font-size: 13px;">It might throw but have marginal force to open the ball valve when under pressure.</span></div>
<div><span style="font-size: 13px;"> </span></div>
<div><span style="font-size: 13px;">Best way to isolate this is to check resistance or current of the solenoid.</span></div>
<div><span style="font-size: 13px;"> </span></div>
<div><span style="font-size: 13px;">Good Luck!</span></div>
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<div>------------------------------</div>
<div><span style="font-size: 13px;">Date: Thu, 17 Sep 2026 09:13:35 -0700</span></div>
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<div>From: Bob Spidell <<a href="mailto:bspidell@comcast.net" target="_blank" rel="noopener">bspidell@comcast.net</a>></div>
<div>To: Healeys <<a href="mailto:healeys@autox.team.net" target="_blank" rel="noopener">healeys@autox.team.net</a>></div>
<div>Subject: [Healeys] Seeking List Wisdom</div>
<div>Message-ID: <<a href="mailto:a0c0f784-b253-4e6a-aea9-e24752184cc3@comcast.net" target="_blank" rel="noopener">a0c0f784-b253-4e6a-aea9-e24752184cc3@comcast.net</a>></div>
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<div>I've had an intermittent issue with my BJ8 O/D. It doesn't engage </div>
<div>reliably, but does maybe 1 out of 10 attempts. I think I've ruled out </div>
<div>electrical issues, as the solenoid activates reliably. I checked the </div>
<div>hydraulic pressure, it's just under 400 PSI. I know that's low per the </div>
<div>shop manual (470-490), but it has worked reliably for years and had the </div>
<div>same pressure after an overhaul.</div>
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<div>Q1: Any ideas why it has stopped engaging after years and thousands of </div>
<div>miles?</div>
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<div>Q2: If it's the pump, can these be changed out in situ?</div>
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<div>TIA,</div>
<div>Bob</div>
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