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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>My OD is driving me mad and I definitely need some inspired advice. A bit of background first. I¡¯ll try to lay out all the facts in a logical sequence. (I¡¯m increasingly reluctant to link ODs with logic!)<o:p></o:p></p><ol style='margin-top:0cm' start=1 type=1><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>I¡¯d say that the OD has done +/- 15k miles since a total rebuild by Overdrive Spares here in UK.<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>The OD had issues before Christmas (21) and was sorted out by OD Spares. The accumulator was uprated and pressure issues sorted.<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>OD functioned 100% on the few times I¡¯d been able to take it out since then until..<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>One day, the OD stopped functioning.<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>I checked the electrics. All fine there so I delved a bit deeper.<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>It had fried its solenoid which I replaced. But¡¦<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>That did not fix the problem so¡¦<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>I decided that the operating valve¡¯s adjustment might be off so..<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>I bought a dial gauge and hoped to sort it out precisely rather than by ¡°feel¡±, which I lack in this area.<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>Prior to using the gauge I decided to see if the OD was functioning at all so I raised the car on stands and fitted my pressure gauge.<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>I get a reading of 500psi rising a bit when I rev the engine but I¡¯d suppose that would drop when the oil warms up.<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>BUT, and this is where things go pear-shaped¡¦moving the little lever on the RHS up and down does not engage/disengage OD. There is no change on the gauge to show OD engaging or disengaging.<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>AND, the gauge stays at 500psi even when the engine is off. Moving the lever 20 times has zero effect. Stayed at 500 overnight!<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>Of course, I checked for dirt in the operating valve area. None.<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>Likewise, the tiny hole in the ¡°valve – operating¡± (the spindle thing which the ball sits on)¡¦.that¡¯s clear. And surely, the pressure would diminish overnight if something in that area was partially obstructed?<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>When I remove the pressure valve, there¡¯s a small spillage – no more than you¡¯d expect – but repeating the pressure gauge process only returns the same results.<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>I see in the bible according to Norman Nock that ¡°Holding this lever with your thumb and index finger, you should be able to push the lever down lightly about ¨ü¡± until you feel a slight spring pressure resistance. The lever should go down another ¨ù¡± after encountering the resistance¡¦¡¦¡± ie there¡¯s about ¨ý¡± movement up & down in that lever. Well, my lever does move and does lift the ball, but there¡¯s not ¨ý¡± movement there. Could that be the problem area???<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>Almost finished¡¦keep reading!<o:p></o:p></li></ol><p class=MsoNormal style='margin-left:18.0pt'>So, I¡¯m stumped. Every time I learn something new about the OD, it has a new trick to baffle me.<o:p></o:p></p><p class=MsoNormal style='margin-left:18.0pt'>I¡¯ve no 100% sure way of telling whether it¡¯s gone into OD and stuck there or whether it¡¯s simply not going into OD at all.<o:p></o:p></p><p class=MsoNormal style='margin-left:18.0pt'>I¡¯ve done a lot of reading through my books and collection of advice from the various gurus and found reference to ODs being stuck but those seemed to be to do with ¡°weak springs¡± which, particularly after a long lay-off, wouldn¡¯t disengage. The cure for this being a good smack on the steel plate sandwiched in the OD from below. Well, that seems to be a stuck mechanism issue whereas I¡¯m facing a hydraulic conundrum. Or am I?<o:p></o:p></p><p class=MsoNormal style='margin-left:18.0pt'>There is what is usually referred to as the ¡°pressure relief valve¡± adjacent to the accumulator. The name suggested that pressure might be stuck in that area¡¦.but surely not overnight?<o:p></o:p></p><p class=MsoNormal style='margin-left:18.0pt'><o:p> </o:p></p><p class=MsoNormal style='margin-left:18.0pt'>Any ideas? I am particularly reluctant to take the gearbox and OD out. You¡¯ll recall the ridiculous business of the defective clutch kit? Well, I forget whether we had the box in and out 3 times or 4. I¡¯d hoped not to do it again so soon or ever for that matter.<o:p></o:p></p><p class=MsoNormal style='margin-left:18.0pt'><o:p> </o:p></p><p class=MsoNormal style='margin-left:18.0pt'>I¡¯m hoping for a miracle of course but some sound advice would be a godsend¡¦¡¦¡¦¡¦<o:p></o:p></p><p class=MsoNormal style='margin-left:18.0pt'><o:p> </o:p></p><p class=MsoNormal style='margin-left:18.0pt'>Thanks,<o:p></o:p></p><p class=MsoNormal style='margin-left:18.0pt'>Simon<o:p></o:p></p><p class=MsoNormal style='margin-left:18.0pt'><o:p> </o:p></p></div></body></html>