<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Team.<div>Coming at this from a different angle, the OP states that the car doesn’t move in reverse. This is usually a problem with the uni-directional (sprag) clutch. Could it be that O/d is permanently engaged somehow rather than failing to engage?</div><div>Just a SWAG.<br><br><div dir="ltr">Alan - from my iPad</div><div dir="ltr"><br><blockquote type="cite">On 21 May 2021, at 04:23, Henry G Leach via Healeys <healeys@autox.team.net> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">Rafael-a few comments about your issues. I coming from a different place by assuming that the cone clutch is ok.<div><br></div><div>First, what oil is in the gearbox and transmission?-only use 30W NON detergent-all others will foam...especially with the addition of heat.</div><div><br></div><div>When the OD was rebuilt- there are two sets of springs of the 8...4 are 4-1/4" and 4 are 4-1/2" the longer springs must go to the outside and the shorter to the inside of the cone structure. If the springs are coil bound from misuse-replace them. If they are reversed the pressure to hold the clutch in direct drive is not sufficient.</div><div><br></div><div>The overdrive must achieve at least 400lbs of pressure at all times in use. The low numbers indicate an accumulator issue. O-rings or piston rings worn or misplaced.</div><div><br></div><div>It is exteamely important that the car never goes into reverse with the overdrive engaged. Make sure the lockout switch is working.</div><div><br></div><div>Be sure the two check balls are in proper place 1/4" and 5/16" do not mix them up with each other.</div><div><br></div><div>Has your OD rebuilder done other Laycock overdrives? Hank</div><div><br></div><div><br><br><div class="reply-new-signature"></div><p>-----------------------------------------</p>From: "Rafael Abugattas via Healeys" <healeys@autox.team.net><br>To: "healeys@autox.team.net"<br>Cc: <br>Sent: Thursday May 20 2021 2:47:20PM<br>Subject: [Healeys] Transmission / Overdrive or Clutch slippage<br><br>
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<p class="ydpfe39e09bxyiv3660242746msonormal" style="background:#FFFFFF;"><span style="font-size:11pt;font-family:Calibri, sans-serif;">Hi
all,</span></p>
<p class="ydpfe39e09bxyiv3660242746msonormal" style="background:#FFFFFF;"><span style="font-size:11pt;font-family:Calibri, sans-serif;">Last
year I requested your help regarding a strange overdrive or
slippage problem I have in my 1962 Tricarb BT7.</span></p>
<p class="ydpfe39e09bxyiv3660242746msonormal" style="background:#FFFFFF;"><span style="font-size:11pt;font-family:Calibri, sans-serif;">I
received very valuable comments and suggestions but sadly the
problem persists: Overdrive would not activate under any
circumstances and when the engine / transmission is warm and we
engage reverse, the engine revs but the car won´t move.</span></p>
<p class="ydpfe39e09bxyiv3660242746msonormal" style="background:#FFFFFF;"><span style="font-size:11pt;font-family:Calibri, sans-serif;">There
is slippage somewhere in the transmission / clutch or overdrive.
When the car is cold, reverse engages without any issues. This only
happens in reverse gear after the car has been driven a few miles
and the engine and transmission are warm. Forward gears engage all
the time without any issues.</span></p>
<p class="ydpfe39e09bxyiv3660242746msonormal" style="background:#FFFFFF;"><span style="font-size:11pt;font-family:Calibri, sans-serif;">The
car has been recently restored. Before the restoration the
overdrive was operational. Now it’s not.</span></p>
<p class="ydpfe39e09bxyiv3660242746msonormal" style="background:#FFFFFF;"><span style="font-size:11pt;font-family:Calibri, sans-serif;">The
transmission and overdrive have been taken apart and assembled
twice looking for something visually wrong. Everything seemed to be
OK.</span></p>
<p class="ydpfe39e09bxyiv3660242746msonormal" style="background:#FFFFFF;"><span style="font-size:11pt;font-family:Calibri, sans-serif;">The
clutch and plate were also removed for inspection. The clutch was
recently redone, adjusted and tested.</span></p>
<p class="ydpfe39e09bxyiv3660242746msonormal" style="background:#FFFFFF;"><span style="font-size:11pt;font-family:Calibri, sans-serif;">A
friend suggested we should verify the oil pressure on the
overdrive. On this link you will find a couple of videos of a test
we have recently done with a manometer installed on the overdrive
to check the oil pressure at different RPM´s.</span></p>
<p class="ydpfe39e09bxyiv3660242746msonormal" style="background:#FFFFFF;"><span style="font-size:11pt;font-family:Calibri, sans-serif;"><a href="https://www.dropbox.com/sh/t5p8kqz6v6yduyt/AADizyVMyBKPozy284B-udA4a?dl=0"></a><a href="https://www.dropbox.com/sh/t5p8kqz6v6yduyt/AADizyVMyBKPozy284B-udA4a?dl=0">https://www.dropbox.com/sh/t5p8kqz6v6yduyt/AADizyVMyBKPozy284B-udA4a?dl=0</a></span></p>
<p class="ydpfe39e09bMsoNormal"><span>The pressure on 3rd and 4th
gears goes up to 400 psi and drops as it goes to lower gears. At
idle is between 150 to 200 psi</span></p>
<p class="ydpfe39e09bxyiv3660242746msonormal" style="background:#FFFFFF;"><span style="font-size:11pt;font-family:Calibri, sans-serif;">In
forward gears the car runs fine; the problem that we need to solve
is that the overdrive would not activate(even though it is
connected and everything seems visually OK) and the slippage we
have when engaging reverse (the car won´t move) when the engine /
transmission is warm.</span></p>
<p class="ydpfe39e09bxyiv3660242746msonormal" style="background:#FFFFFF;"><span style="font-size:11pt;font-family:Calibri, sans-serif;">We
are located in Lima – Peru and as you may imagine, there are not
many experts in this particular area of expertise.</span></p>
<p class="ydpfe39e09bxyiv3660242746msonormal" style="background:#FFFFFF;"><span style="font-size:11pt;font-family:Calibri, sans-serif;">Any
thoughts or suggestions from you collective knowledge and wisdom on
how to proceed will be much appreciated.</span></p>
<p class="ydpfe39e09bxyiv3660242746msonormal" style="background:#FFFFFF;"><span style="font-size:11pt;font-family:Calibri, sans-serif;">Thanks
in advance!</span></p>
<p class="ydpfe39e09bxyiv3660242746msonormal" style="background:#FFFFFF;word-spacing:0px;">
<span lang="es-mx" style="font-size:11pt;font-family:Calibri, sans-serif;">
Rafael</span></p>
<p class="ydpfe39e09bMsoNormal"> </p>
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</healeys@autox.team.net></div>
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