<HTML><HEAD></HEAD>
<BODY dir=ltr>
<DIV dir=ltr>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR: #000000">
<DIV>Quantum mechanics used to recommend 30W</DIV>
<DIV>non detergent oil and it always worked well for us.</DIV>
<DIV>We are putting together a TR6 w/ Odr and I decided </DIV>
<DIV>to check in to see if that had changed and their new</DIV>
<DIV>recommendation is Redline MT 90 75w90 GL4.</DIV>
<DIV> </DIV>
<DIV>drove the car once and the OD shifted well. </DIV>
<DIV> </DIV>
<DIV>art at riverside sports cars.</DIV>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV style="FONT: 10pt tahoma">
<DIV> </DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A title=mgs@autox.team.net
href="mailto:mgs@autox.team.net">Jack Wheeler via Mgs</A> </DIV>
<DIV><B>Sent:</B> Friday, January 18, 2019 10:32 AM</DIV>
<DIV><B>To:</B> <A title=paul@ece.rochester.edu
href="mailto:paul@ece.rochester.edu">Osborne, Paul</A> </DIV>
<DIV><B>Cc:</B> <A title=mgs@autox.team.net
href="mailto:mgs@autox.team.net">Mglist</A> </DIV>
<DIV><B>Subject:</B> Re: [Mgs] Overdrive Diagram</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV class=ydp836d150eyahoo-style-wrap
style="FONT-SIZE: 13px; FONT-FAMILY: helvetica neue, helvetica, arial, sans-serif">
<DIV></DIV>
<DIV>Hi Paul. You are correct, I removed the low pressure valve, NOT the
pump assembly. I was looking at the manual and the parts which came out
appeared to be closer to those shown as the pump assembly, but neither was the
same as mine. That's how I assumed it was the pump assembly.</DIV>
<DIV> </DIV>
<DIV>So, now that I have the low pressure valve installed properly, the
overdrive still does not engage. The other thing I changed was the gear
oil. I always used straight 50 Wt. motor oil in my overdrives, and that
worked fine. Based on a recent article in the Tech Issue of "MG Driver"
magazine, I switched to EP 85/90 GL-4 gear oil. Do you think this could be
causing the problem?</DIV>
<DIV> </DIV>
<DIV>Thanks for your help.</DIV>
<DIV> </DIV>
<DIV>Jack<BR></DIV>
<DIV> </DIV></DIV>
<DIV id=ydpe26716e7yahoo_quoted_8602960656 class=ydpe26716e7yahoo_quoted>
<DIV
style="FONT-SIZE: 13px; FONT-FAMILY: 'Helvetica Neue', helvetica, arial, sans-serif; COLOR: #26282a">
<DIV>On Thursday, January 17, 2019, 10:38:25 PM EST, Osborne, Paul
<paul@ece.rochester.edu> wrote: </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>
<DIV id=ydpe26716e7yiv7383493621>
<DIV>Hi Jack, hum, a few things I might be a able to help. I have been
build/repair the Laycock OD units and transmissions for a some time, for MGS and
Triumphs and Jaguar. I have seen a good number. I do not claim to be the last
word on these. Some info about your unit may help. 1971 MGB is
it orig to the car?
<DIV class=ydpe26716e7yiv7383493621>If so it should be a black label LH unit
mated to a full synchro 4 Spd trans. The pump assy. Is located in the sump, not
visible from the outside housing unless the sump is removed. All have a roller
in the end as that is running on the input shaft which has a pump cam. Is that
what you removed? If that is not what you removed, but you removed the large nut
just nest to the solenoid cover(black label) that is the pressure valve. There
is not roller on that plunger. Let’s stop there for now and let me know if
this is what was removed. </DIV>
<DIV class=ydpe26716e7yiv7383493621> </DIV>
<DIV class=ydpe26716e7yiv7383493621>Paul</DIV>
<DIV class=ydpe26716e7yiv7383493621> </DIV>
<DIV class=ydpe26716e7yiv7383493621>
<DIV> </DIV>
<DIV><BR class=ydpe26716e7yiv7383493621 clear=none>
<BLOCKQUOTE class=ydpe26716e7yiv7383493621 type="cite">
<DIV id=ydpe26716e7yiv7383493621yqt20554
class=ydpe26716e7yiv7383493621yqt5330100593>
<DIV class=ydpe26716e7yiv7383493621>On Jan 17, 2019, at 2:13 PM, Jack Wheeler
via Mgs <<A class=ydpe26716e7yiv7383493621 href="mailto:mgs@autox.team.net"
shape=rect rel=nofollow target=_blank>mgs@autox.team.net</A>> wrote:</DIV>
<DIV> </DIV>
<DIV class=ydpe26716e7yiv7383493621>
<DIV class=ydpe26716e7yiv7383493621>
<DIV class=ydpe26716e7yiv7383493621ydp626bf091yahoo-style-wrap
style="FONT-SIZE: 13px; FONT-FAMILY: helvetica neue, helvetica, arial, sans-serif">Does
anyone have a good exploded diagram of the overdrive unit used in a 1971 MGB,
that you could send to me? I am particularly interested in the pump
assembly. I changed the oil in my gearbox this week, using EP 85/90 GL-4
gear oil, as recommended in a recent article in the MG Driver magazine.</DIV>
<DIV class=ydpe26716e7yiv7383493621ydp626bf091yahoo-style-wrap
style="FONT-SIZE: 13px; FONT-FAMILY: helvetica neue, helvetica, arial, sans-serif"> </DIV>
<DIV class=ydpe26716e7yiv7383493621ydp626bf091yahoo-style-wrap
style="FONT-SIZE: 13px; FONT-FAMILY: helvetica neue, helvetica, arial, sans-serif">While
the car was up in the air, I noticed a leak around the plug which holds the
pump assembly in place. So, I removed the pump, careful to keep all the
pieces in the order in which they came out. I cleaned everything up, and
reinstalled the pump assembly and plug (part number 466-315 in the Moss
catalog), with a new gasket. I thought I had all of the pieces of the
pump assembly (items 62-66 in the Moss diagram) in the right order when I
reinstalled it, but when I took the car out for a test drive, the overdrive
would not engage.</DIV>
<DIV class=ydpe26716e7yiv7383493621ydp626bf091yahoo-style-wrap
style="FONT-SIZE: 13px; FONT-FAMILY: helvetica neue, helvetica, arial, sans-serif"> </DIV>
<DIV class=ydpe26716e7yiv7383493621ydp626bf091yahoo-style-wrap
style="FONT-SIZE: 13px; FONT-FAMILY: helvetica neue, helvetica, arial, sans-serif">In
addition to trying to keep the pieces in the order in which they came out, I
also used the exploded diagram in the Moss catalog (Page 41) as a guide.
The Moss diagram, however, is different than my overdrive unit. Moss
says their diagram is for cars from 1968 to 1980, but apparently, some things
were changed during that time frame. I can't believe the engineers would
let anything go unchanged for 12 years! It looks like the plunger (Moss
part number 466-305) shown in the Moss catalog diagram has a roller on the end
of it. My plunger does not have a roller on the end of it. Maybe
this will give you a lead to which diagram I am looking for.<BR
class=ydpe26716e7yiv7383493621 clear=none></DIV>
<DIV class=ydpe26716e7yiv7383493621ydp626bf091yahoo-style-wrap
style="FONT-SIZE: 13px; FONT-FAMILY: helvetica neue, helvetica, arial, sans-serif"> </DIV>
<DIV class=ydpe26716e7yiv7383493621ydp626bf091yahoo-style-wrap
style="FONT-SIZE: 13px; FONT-FAMILY: helvetica neue, helvetica, arial, sans-serif">So,
that leaves me looking for a good exploded diagram of the unit used in a 1971
model. Can anyone help with that, or does anyone have any suggestions as
to what I might have done to make the overdrive not work, when it has always
worked fine. Thanks.</DIV>
<DIV class=ydpe26716e7yiv7383493621ydp626bf091yahoo-style-wrap
style="FONT-SIZE: 13px; FONT-FAMILY: helvetica neue, helvetica, arial, sans-serif"> </DIV>
<DIV class=ydpe26716e7yiv7383493621ydp626bf091yahoo-style-wrap
style="FONT-SIZE: 13px; FONT-FAMILY: helvetica neue, helvetica, arial, sans-serif">Jack
Wheeler<BR class=ydpe26716e7yiv7383493621
clear=none></DIV></DIV>_______________________________________________<BR
class=ydpe26716e7yiv7383493621 clear=none><BR class=ydpe26716e7yiv7383493621
clear=none><A class=ydpe26716e7yiv7383493621 href="mailto:Mgs@autox.team.net"
shape=rect rel=nofollow target=_blank>Mgs@autox.team.net</A><BR
class=ydpe26716e7yiv7383493621 clear=none>Donate:
https://urldefense.proofpoint.com/v2/url?u=http-3A__www.team.net_donate.html&d=DwICAg&c=kbmfwr1Yojg42sGEpaQh5ofMHBeTl9EI2eaqQZhHbOU&r=j_uK0-rtrtcKZ8O0aGq-Y5ZUDfHjCD_Cv57WMn_czag&m=g6D-m-3Vte2wLeo91JPc3c9ssTpjceXZWly8rBQfc-M&s=ZvWc9TnAeOhmDeX_WvAqmbOWCKIYjvppPda3u6kog3A&e=<BR
class=ydpe26716e7yiv7383493621 clear=none>Suggested annual donation
$12.75<BR class=ydpe26716e7yiv7383493621 clear=none><BR
class=ydpe26716e7yiv7383493621 clear=none>Archive:
https://urldefense.proofpoint.com/v2/url?u=http-3A__www.team.net_pipermail_mgs&d=DwICAg&c=kbmfwr1Yojg42sGEpaQh5ofMHBeTl9EI2eaqQZhHbOU&r=j_uK0-rtrtcKZ8O0aGq-Y5ZUDfHjCD_Cv57WMn_czag&m=g6D-m-3Vte2wLeo91JPc3c9ssTpjceXZWly8rBQfc-M&s=JnbABjlm5rLB_0uXalIRv-TF6DwEBq9nDuJvQw_Vh0A&e=<BR
class=ydpe26716e7yiv7383493621 clear=none><BR class=ydpe26716e7yiv7383493621
clear=none>Unsubscribe:
https://urldefense.proofpoint.com/v2/url?u=http-3A__autox.team.net_mailman_options_mgs_paul-40ece.rochester.edu&d=DwICAg&c=kbmfwr1Yojg42sGEpaQh5ofMHBeTl9EI2eaqQZhHbOU&r=j_uK0-rtrtcKZ8O0aGq-Y5ZUDfHjCD_Cv57WMn_czag&m=g6D-m-3Vte2wLeo91JPc3c9ssTpjceXZWly8rBQfc-M&s=gZqPtGX8g1gKL9dteHFkyvKwrY2Ykb1ZhT9BlYPU53g&e=<BR
class=ydpe26716e7yiv7383493621 clear=none></DIV></DIV></BLOCKQUOTE></DIV>
<DIV> </DIV>
<DIV class=ydpe26716e7yiv7383493621>
<DIV class=ydpe26716e7yiv7383493621>
<DIV
style="FONT-SIZE: 14px; TEXT-DECORATION: none; FONT-FAMILY: helvetica; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; LETTER-SPACING: normal; TEXT-INDENT: 0px">Paul
Osborne<BR class=ydpe26716e7yiv7383493621 clear=none>Department of Electrical
and Computer Engineering<BR class=ydpe26716e7yiv7383493621 clear=none>University
of Rochester<BR class=ydpe26716e7yiv7383493621 clear=none>201 Hopeman Building
RC<BR class=ydpe26716e7yiv7383493621 clear=none>Rochester, NY 14627<BR
class=ydpe26716e7yiv7383493621 clear=none><BR class=ydpe26716e7yiv7383493621
clear=none>585-275-5226<BR class=ydpe26716e7yiv7383493621 clear=none><BR
class=ydpe26716e7yiv7383493621 clear=none></DIV></DIV></DIV>
<DIV> </DIV></DIV></DIV></DIV></DIV></DIV></DIV>
<P>
<HR>
_______________________________________________<BR><BR>Mgs@autox.team.net<BR>Donate:
http://www.team.net/donate.html<BR>Suggested annual donation
$12.75<BR><BR>Archive: http://www.team.net/pipermail/mgs<BR><BR>Unsubscribe:
http://autox.team.net/mailman/options/mgs/riverside@southslope.net<BR></DIV></DIV></DIV></BODY></HTML>