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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span style='font-family:"Times New Roman",serif;mso-fareast-language:EN-US'>I’ve determined this much:-<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman",serif;mso-fareast-language:EN-US'>After, say, 5 miles the car started slipping in/out of OD. It was a slower in/out than one would obtain with the dashboard switch. Sort of slipping in/out. Not “dropping out” so far as I can determine.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman",serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman",serif;mso-fareast-language:EN-US'>Per Michael’s advice, I removed the operating valve and charged up/down hills and along a Motorway. No slippage. At all. I concluded that the clutch on the flywheel was not slipping. (TG, as it’s practically brand new).<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman",serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman",serif;mso-fareast-language:EN-US'>I then replaced the all the valve components under a gauge, jacked the car up/wheels off the ground and spun up the engine..into gear and switched on the OD. A steady 500psi which remained steady with the engine off until I engaged/disengaged the OD a few times. Which, from memory, is what one would expect. At this stage I cleaned out the rod. No dirt detected in little hole but could easily miss a flake of paint or a piece of swarf……<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman",serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman",serif;mso-fareast-language:EN-US'>The solenoid makes a healthy click and visibly lifts the lever, say, ¼”. Appears(!) healthy. OD seems to go in and out as it should and not slip but wheels are off the ground so not a fair test for slippage. <o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman",serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman",serif;mso-fareast-language:EN-US'>The whole OD was rebuilt, by OD spares about 15 years ago since when it’s had a fairly relaxed time and about 15,000 miles. Very seldom more than 80mph and usually cruising at 65mph on Motorway. The front, pump end, was rebuilt by ODSpares in late 2021. Car has a 28% OD and a 3:54 diff so 65mph is fairly relaxed rev wise.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman",serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman",serif;mso-fareast-language:EN-US'>Have not delved into Throttle Switch, Relay or Solenoid yet. Will do so, in that order, when weather permits test drives.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman",serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman",serif;mso-fareast-language:EN-US'>Thank you everyone for your help and attention in this matter,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman",serif;mso-fareast-language:EN-US'>Simon<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman",serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Healeys <healeys-bounces@autox.team.net> <b>On Behalf Of </b>Bob Spidell<br><b>Sent:</b> Friday, April 26, 2024 7:17 PM<br><b>To:</b> gradea1@charter.net; healeys@autox.team.net<br><b>Subject:</b> Re: [Healeys] Overdrive pressure or clutch slip Step 2!<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>I lost the plot (not unusual): Have we determined, for sure, that the problem is 'slippage,' which would most likely be due to wear in the O/D cone clutch? Or have we determined that Simon's O/D is 'dropping out' which, to my thinking, would be caused by the 8 strong springs overcoming hydraulic pressure (and causing the brake ring to slip or disengage, no?). <br><br><o:p></o:p></p><div><p class=MsoNormal>On 4/26/2024 10:03 AM, Hank Leach wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal>Ok the pressure gauge implies that the hydraulic system is in good condition and that will effectively produce overdrive when the cone clutch is pushed forward in the box. When OD is <strong><span style='font-family:"Aptos",sans-serif'>not required</span></strong> the solenoid is inactive and the 8 springs in the unit have to keep the cone clutch in the rearward or in direct drive position.<o:p></o:p></p></div><div><p class=MsoNormal>These are stout springs and normally are strong enough to engage and hold the clutch without slipping, overcoming the hydraulic influence-which should be draining at this point..However if the springs are misinstalled in the wrong position or not properly mounted on their tabs upon assembly or previously "coil bound" from that procedure or wear, they will not function to keep direct drive solid without slipping.<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>The clutch material should outlive all of us and is not normally, or easily, replaced. All you have to keep the car in direct drive are those 8 springs and their pressure.<br>-Hate to say it but if the re-assembly was defective, the gearbox needs to come out and OD removed and checked for correct spring fit-at that time I would replace the 8 springs (about $100 from Moss) as a routine repair. (photos from my article in AH Mag) Hank<br><br>From: "Bob Spidell" <a href="mailto:bspidell@comcast.net"><bspidell@comcast.net></a> <br>To: <a href="mailto:healeys@autox.team.net"><healeys@autox.team.net></a> <br>Sent: April 26, 2024 at 9:37 AM PDT <br>Subject: Re: [Healeys] Overdrive pressure or clutch slip Step 2! <br>Spitballing ...<br><br>I went through my BJ8's O/D a few years ago. The car had 64K miles on it when I bought it (approx. 1984), and about 215K* miles on it when I did the overhaul. The O/D cone clutch was serviceable--and AFAIK didn't slip--and I reinstalled it. If new cone clutches were readily available I <em><span style='font-family:"Aptos",sans-serif'>might</span></em> have bought new, on principle, depending on cost, but all I could find was a re-manned one from DWM. To me this implied they didn't often need replacement, whereas known wear items like the accumulator are offered by several vendors (I would have installed one with an O-ring if I'd known about it).<br><br>All this to say, unless the car has extremely high mileage and/or the O/D has been abused somehow I'd be surprised if the clutch is worn 'to the bone.' Obviously, slippage in the cone clutch would cause Simon's car's symptoms; if so, the problem will get progressively worse (and more consistent). I think one way to test an O/D clutch would be to really lug the car pulling an uphill grade in 4th-O/D, if the clutch is going to slip it would do it then (as would a worn engine clutch). There's also a (remote) possibility that, for some reason, O/D pressure fluctuates during driving.<br><br><br>* Anyone else have this many or more known miles on a Healey?<br><br>bs<br><br><br><o:p></o:p></p></div><div><p class=MsoNormal>On 4/26/2024 4:51 AM, Michael Salter wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=MsoNormal><span style='font-size:9.5pt;font-family:"Times New Roman",serif'>"What I can’t do is understand the leap to the OD cone clutch?"</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:9.5pt;font-family:"Times New Roman",serif'> </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:9.5pt;font-family:"Times New Roman",serif'> Fair question.</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:9.5pt;font-family:"Times New Roman",serif'>Between the flywheel and the rear wheels there are only 2 places where "slippage" can occur these are the clutch and the overdrive's cone clutch. </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:9.5pt;font-family:"Times New Roman",serif'>The gearbox, other than the cone clutch in the overdrive, is a go/no go arrangement, i.e. no "slippage".</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:9.5pt;font-family:"Times New Roman",serif'>The rear wheel splines, believe it or not, can also produce "slippage " if they are in really bad condition but I presume that isn't the case here.</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:9.5pt;font-family:"Times New Roman",serif'> </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:9.5pt;font-family:"Times New Roman",serif'>The test that you just completed resulted in no driveline slippage when the overdrive was disabled. </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:9.5pt;font-family:"Times New Roman",serif'>You are reporting slippage when the overdrive operating system is enabled so it follows that further diagnosis of that is required.</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:9.5pt;font-family:"Times New Roman",serif'> </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:9.5pt'>Yes, your next step would be the same test drive, i.e. full engine torque on an uphill grade, to confirm that the slippage issue has returned now that the overdriveoperating valvehasbe re-installed. </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:9.5pt'>I would do this test drive BEFORE making any adjustments to the overdrive valve or solenoid in order to confirm that meerly installing the overdrive operating valve resulted in the slippage issue returning. </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:9.5pt'>Hope the weather improves, beautiful day here.</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:9.5pt'>M</span><o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Fri., Apr. 26, 2024, 7:24 a.m. Simon Lachlan, <<a href="mailto:simon.lachlan@alexarevel.plus.com" target="_blank">simon.lachlan@alexarevel.plus.com</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'>Hi, Thanks for this.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'>Not sure I understand fully. </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'>Once I’d finished the test drive with the OD operating valve out of the car, I returned the rod, ball, spring etc and put in the gauge rather than the nut. And got 500+ psi. </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'>What I can’t do is understand the leap to the OD cone clutch. Not arguing…just saying no comprende. As I sat in the car, I was thinking that the function of the OD seems OK and that it’s being interfered with by something in its circuitry……relay, solenoid or throttle switch. That’s probably wishful thinking as I really don’t want to be swimming in those waters.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'>I did, as a matter of course, clean out the tiny hole in the rod but didn’t detect any blockage….which doesn’t mean much as something minute could have been inside and been washed away by the detergent/hot water then WD40…..</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'>After someone’s advice – some time back – I’ve got another rod whose aperture has been drilled out to 1.5mm. This was “to allow the OD to disengage faster”. Don’t recall if I tried it. Could that rod be any help here?</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'>The ball seems to be sitting square on its seat and the tip of the rod, where the ball sits, is not worn or chipped.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'>Residual pressure….. goes to 500+ when I switch OD ON and stays there until, engine and switch OFF, I energize the solenoid a few times whereupon it drops to zero.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'>Another test drive(s) seems called for. But the hood is off to enable access and the forecast is grim for the next week.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'>Very open to more suggestions. Thanks,</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'>Simon</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'> </span><o:p></o:p></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><strong><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></strong><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Michael Salter <<a href="mailto:michaelsalter@gmail.com" target="_blank">michaelsalter@gmail.com</a>> <br><strong><span style='font-family:"Calibri",sans-serif'>Sent:</span></strong> Friday, April 26, 2024 12:14 AM<br><strong><span style='font-family:"Calibri",sans-serif'>To:</span></strong> Simon Lachlan <<a href="mailto:simon.lachlan@alexarevel.plus.com" target="_blank">simon.lachlan@alexarevel.plus.com</a>><br><strong><span style='font-family:"Calibri",sans-serif'>Cc:</span></strong> Healeys <<a href="mailto:healeys@autox.team.net" target="_blank">healeys@autox.team.net</a>><br><strong><span style='font-family:"Calibri",sans-serif'>Subject:</span></strong> Re: Overdrive pressure or clutch slip Step 2!</span><o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Okay, then it is confirmed that neither the clutch (on the flywheel) nor the overdrive cone clutch (in it's normal drive condition) are producing the slippage. <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>From this we can conclude that even when the overdrive solenoid is <strong><u><span style='font-family:"Aptos",sans-serif'>not</span></u></strong> energized the slippage is occurring at the overdrive cone clutch and that for some reason hydraulic pressure is finding its way into the overdrive operating cylinders even when the overdrive operating valve is closed.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>This can be caused by leakage past operating the valve or residual pressure.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>The question of residual pressure can be resolved by checking that the bleed hole in the bottom of the long overdrive valve push rod is not blocked.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Whether or not hydraulic pressure is leaking past the operating valve ball can be checked by ensuring that the ball is clearly on its seat when the operating valve is <strong><u><span style='font-family:"Aptos",sans-serif'>not </span></u></strong> energized.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>M<o:p></o:p></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Thu., Apr. 25, 2024, 3:38 p.m. Simon Lachlan, <<a href="mailto:simon.lachlan@alexarevel.plus.com" target="_blank">simon.lachlan@alexarevel.plus.com</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:50pt'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'>Of course. Isn’t that how I got the 520psi?</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'> </span><o:p></o:p></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><strong><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></strong><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Michael Salter <<a href="mailto:michaelsalter@gmail.com" target="_blank">michaelsalter@gmail.com</a>> <br><strong><span style='font-family:"Calibri",sans-serif'>Sent:</span></strong> Thursday, April 25, 2024 6:19 PM<br><strong><span style='font-family:"Calibri",sans-serif'>To:</span></strong> Simon Lachlan <<a href="mailto:simon.lachlan@alexarevel.plus.com" target="_blank">simon.lachlan@alexarevel.plus.com</a>><br><strong><span style='font-family:"Calibri",sans-serif'>Cc:</span></strong> Healeys <<a href="mailto:healeys@autox.team.net" target="_blank">healeys@autox.team.net</a>><br><strong><span style='font-family:"Calibri",sans-serif'>Subject:</span></strong> Re: Overdrive pressure or clutch slip Step 2!</span><o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Question ... when you got home and did the pressure test I presume that was AFTER you had put the valve with the "top hat", ball, spring and valve rod cap and washer back into position?<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>M<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Thu., Apr. 25, 2024, 12:29 p.m. Simon Lachlan, <<a href="mailto:simon.lachlan@alexarevel.plus.com" target="_blank">simon.lachlan@alexarevel.plus.com</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:50pt'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'>So, here is Michael’s “Step 1” completed. (See his email, below).</span><o:p></o:p></p><ol start=1 type=1><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1'><span style='font-family:"Times New Roman",serif'>Removed the operating valve and, just for luck, disconnected the two wires into 3<sup>rd</sup>/4<sup>th</sup> switch. Took the car for a spin. Up/down longish/steepish hills, 10 miles on motorway. Various rpm…..no slippage at all.</span><o:p></o:p></li><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1'><span style='font-family:"Times New Roman",serif'>Had a puncture…..nail in tyre. Rear RHS. Flat as a pancake at once. Nearly onto rim. Nail! I imagine the inner tube is shredded and the tyre may be a write-off. (Usually are!). Anyhow, I bore you with this as I’m convinced that I’d never have got the wheel off without the little scissors jack which I carry to get the car up the first few inches until the Healey jack comes into play. Just a suggestion…….</span><o:p></o:p></li><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1'><span style='font-family:"Times New Roman",serif'>Got home and jacked car up to test pressure. Steady at 520psi which, I recall, is plenty. Stayed at 520 across rev range. Dropped very slowly once engine was off and dropped to zero as I engaged/disengaged OD a few times. Which is normal I think?</span><o:p></o:p></li><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1'><span style='font-family:"Times New Roman",serif'>Solenoid makes a robust “click” when it should and engages the OD when activated.</span><o:p></o:p></li></ol><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'>So what’s a sensible “Step 2”??</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'>I have been urged to check the setting of the Throttle Switch (TS). Assuming that the slippage returns (and why wouldn’t it?), I’ll short the TS out to see if that fixes it. If it does, I’ll check the adjustment.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'>Suggestions would be more than welcome……I do dread having to take that box out again. I’ve got a very adequate ramp and a very strong volunteer(?) but, regardless of all that, it’s still quite a task. And, like a few of us, I’m not as young as I once was. I’ve always enjoyed the lines from the manual which I reproduce, below. </span><span style='font-family:"Tahoma",sans-serif'>���</span><span style='font-family:"Times New Roman",serif'>Gently ease”!?! </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'>Thanks, Simon</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Times New Roman",serif'> </span><o:p></o:p></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><strong><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></strong><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Michael Salter <<a href="mailto:michaelsalter@gmail.com" target="_blank">michaelsalter@gmail.com</a>> <br><strong><span style='font-family:"Calibri",sans-serif'>Sent:</span></strong> Monday, April 22, 2024 3:21 PM<br><strong><span style='font-family:"Calibri",sans-serif'>To:</span></strong> Simon Lachlan <<a href="mailto:simon.lachlan@alexarevel.plus.com" target="_blank">simon.lachlan@alexarevel.plus.com</a>><br><strong><span style='font-family:"Calibri",sans-serif'>Cc:</span></strong> Healeys <<a href="mailto:healeys@autox.team.net" target="_blank">healeys@autox.team.net</a>><br><strong><span style='font-family:"Calibri",sans-serif'>Subject:</span></strong> Re: [Healeys] Overdrive pressure or clutch slip</span><o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><strong><u><span style='font-family:"Aptos",sans-serif'>Correct diagnosis is 1/2 the repair!!</span></u></strong><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>First you need to confirm whether the clutch (on the flywheel) or the overdrive is causing the slippage. <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>To do this you ABSOLUTELY MUST disable the overdrive as a badly misadjuster overdrive operating valve can produce similar symptoms. <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>To do this I would remove the overdrive operating valve completely. (There are other ways but this is absolutely definitive).<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Now drive the car up a long hill where you are amle to use full throttle at around 3000 RPM (maximum torque) for a few seconds. If it is the clutch (on the flywheel) that is causing the slippage these operating conditions. Test this a few times to be sure.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>If there is no slippage we have confirmed that the overdrive clutch is at fault.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Step 1 completed. Please report results. MS.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:50pt'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Mon., Apr. 22, 2024, 8:08 a.m. Simon Lachlan via Healeys, <<a href="mailto:healeys@autox.team.net" target="_blank">healeys@autox.team.net</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:50pt'><div><p><span style='font-family:"Times New Roman",serif'>You may recall the very extended overdrive and clutch saga last year.</span> <span style='font-family:"Times New Roman",serif'>Long story short(ish)…</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>OD was slipping in and out depending on oil temperature.</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>Correctly diagnosed pressure. Checked with gauge.</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>Attempted rebuild…going only so far as</span> <span style='font-family:"Times New Roman",serif'>accumulator and related seals.</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>Stymied as could not get pump out. Turned out to have been “fixed” at some stage with some form of “chemical metal” which was coming loose/apart.</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>Took it up to OD Spares who fixed it..new housing etcetc</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>Why not a new clutch I thought? Sensible while you’re in the area looking at a 30+ yr old item.</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>New clutch…no good. Noisy, wouldn’t</span> <span style='font-family:"Times New Roman",serif'>engage/disengage/play at all.</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>Gearbox out again.</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>Refit clutch. Presumed I’d made some beginner’s mistake.</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>Refit gearbox…no good. Same</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>Can’t recall whether I tried again. Lost count and enthusiasm by now.</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>Turned out that the new clutch kit was defective. (Thanks Mirek) (Genuine B&B from AHSpares).</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>New one did work.</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>Saga over until yesterday.</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>Same sort of symptoms…..</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>All’s well for first 10 or so miles. Then the dreaded slippage(?) starts. But it’s not quite the same. Reminds me more of a slipping clutch. (But NO smell)</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>Symptoms continue if it’s in or out of OD.</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>Symptoms reduce at speed.</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>Yes, plenty of oil. Over the full mark. Looks very clean. Pretty sure it’s 40wt</span> <span style='font-family:"Times New Roman",serif'>non-detergent topped up with 30wt non-detergent. (Or vice-versa).</span> <span style='font-family:"Times New Roman",serif'>Am confident in state of the filter, magnets etc.</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>No, I have not pressure tested it yet and yes, I dread restarting the whole bloody process all over again. I’m not sure I can face taking the box out again once, let alone multiple times.</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>What I want and experience tells me I’m unlikely to get is a miracle cure!</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>One initial question…..do OD relays either work or not work? ie, can the relay hover between on and off</span> <span style='font-family:"Times New Roman",serif'>which might lead to the OD coming in and out? I think that could happen if the switch is off but the unit still hasn’t got the message to disengage from the bulkhead switch.</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>And a supplementary….how</span> <span style='font-family:"Times New Roman",serif'>do I bench test</span> <span style='font-family:"Times New Roman",serif'>the relay?</span><o:p></o:p></p><p><span style='font-family:"Times New Roman",serif'>Simon</span><o:p></o:p></p></div></blockquote></div></blockquote></div></div></div></blockquote></div></div></div></blockquote></div></div></div></blockquote></div><p class=MsoNormal><o:p> </o:p></p><pre>_______________________________________________<o:p></o:p></pre><pre>Support Team.Net <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a><o:p></o:p></pre><pre>Suggested annual donation $12.75<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Archive: <a href="http://www.team.net/pipermail/healeys">http://www.team.net/pipermail/healeys</a> <a href="http://autox.team.net/archive/healeys">http://autox.team.net/archive/healeys</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre><a href="mailto:Healeys@autox.team.net">Healeys@autox.team.net</a><o:p></o:p></pre><pre><a href="http://autox.team.net/mailman/listinfo/healeys">http://autox.teamnet/mailman/listinfo/healeys</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/healeys/bspidell@comcast.net">http://autox.team.net/mailman/options/healeys/bspidell@comcast.net</a><o:p></o:p></pre><pre><o:p> </o:p></pre></blockquote><div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p></div></blockquote><p class=MsoNormal><o:p> </o:p></p></div></body></html>