<html><body>Hi healeymanjim -there a few statements you made that trouble me about your overdrive.<div><br></div><div>1-why was there 90W oil in the trans? Was there an attempt to get more pressure with heavier oil?</div><div><br></div><div>2- if you can manually engage overdrive with the lever on the right-the overdrive is working and pressure has been built up enough to switch from direct to OD (overcome spring pressure). However you should probably measure the pressure with a gauge and insure that it is over 400lbs.(photo)</div><div><br></div><div>3-the mainshaft should have nothing to do with engagement</div><div><br></div><div>4-if the solenoid is good, and if properly adjusted, it should shift into OD if the switch on the dash is in OD. My guess is that the adjustment is not by the book. Measure the solenoid and if it draws about 8 Amps, it is defective.</div><div><br></div><div>5-you can follow the procedure in the workshop manual to remover the accumulator, remembering that a huge spring is pushing on the solenoid case and must be eased out. You should have the correct replacement parts-piston rings or o-rings and any gaskets-and a proper puller before you pull it apart, as just examining it and replacing it won't give you an answer, unless you see major scoring or broken piston rings.</div><div><br></div><div>6- I would never use 90W oil in that gearbox. It will foam and cause problems in the overdrive and when cold adds additional problems with gear engagement. Use the 30 ND (won't foam)</div><div><br></div><div>Take particular care in disassembly, as this is an involved mechanism, and must be handled correctly to achieve successful operation. Regards, Hank<br><br><div class="reply-new-signature"></div><p>-----------------------------------------</p>From: "healeymanjim via Healeys" <healeys@autox.team.net><br>To: "healeys@autox.team.net"<br>Cc: <br>Sent: Sunday June 13 2021 3:33:31PM<br>Subject: [Healeys] overdrive problem<br><br>
is there such a thing as a stuck accumulator in the overdrive? a
few weeks ago we changed the gasket on the side of the<br>
case that houses the solenoid and arm. have been unable to get o/d
to engage electrically ever since. the solenoid is new<br>
and works perfectly as long as the overdrive mainshaft is not
turning. it tries to move the arm but is unable. pushing on<br>
the right side shaft lever for a second or two will engage the o/d
and it will stay in o/d until the o/d switch is returned to<br>
normal. it is like the accumulator has no pressure and does not
give the boost to engage the o/d. can the accumulator be<br>
removed without damaging it? it had MT 90 oil in it which we
replaced with 30ND hoping to stop any more leaks but can<br>
put it back in if it would help. any assistance welcomed.<br>
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