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Does anyone have a good exploded diagram of the overdrive unit used in a 19=
71 MGB, that you could send to me?=C2=A0 I am particularly interested in th=
e pump assembly.=C2=A0 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 ma=
gazine.
While the car was up in the air, I noticed a leak around the plug which hol=
ds the pump assembly in place.=C2=A0 So, I removed the pump, careful to kee=
p all the pieces in the order in which they came out.=C2=A0 I cleaned every=
thing up, and reinstalled the pump assembly and plug (part number 466-315 i=
n the Moss catalog), with a new gasket.=C2=A0 I thought I had all of the pi=
eces of the pump assembly (items 62-66 in the Moss diagram) in the right or=
der when I reinstalled it, but when I took the car out for a test drive, th=
e overdrive would not engage.
In addition to trying to keep the pieces in the order in which they came ou=
t, I also used the exploded diagram in the Moss catalog (Page 41) as a guid=
e.=C2=A0 The Moss diagram, however, is different than my overdrive unit.=C2=
=A0 Moss says their diagram is for cars from 1968 to 1980, but apparently, =
some things were changed during that time frame.=C2=A0 I can't believe the =
engineers would let anything go unchanged for 12 years!=C2=A0 It looks like=
the plunger (Moss part number 466-305) shown in the Moss catalog diagram h=
as a roller on the end of it.=C2=A0 My plunger does not have a roller on th=
e end of it.=C2=A0 Maybe this will give you a lead to which diagram I am lo=
oking for.
So, that leaves me looking for a good exploded diagram of the unit used in =
a 1971 model.=C2=A0 Can anyone help with that, or does anyone have any sugg=
estions as to what I might have done to make the overdrive not work, when i=
t has always worked fine.=C2=A0 Thanks.
Jack Wheeler
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<html><head></head><body><div class=3D"ydp626bf091yahoo-style-wrap" style=
=3D"font-family: Helvetica Neue, Helvetica, Arial, sans-serif; font-size: 1=
3px;">Does anyone have a good exploded diagram of the overdrive unit used i=
n 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, usi=
ng EP 85/90 GL-4 gear oil, as recommended in a recent article in the MG Dri=
ver magazine.</div><div class=3D"ydp626bf091yahoo-style-wrap" style=3D"font=
-family: Helvetica Neue, Helvetica, Arial, sans-serif; font-size: 13px;"><b=
r></div><div class=3D"ydp626bf091yahoo-style-wrap" style=3D"font-family: He=
lvetica Neue, Helvetica, Arial, sans-serif; font-size: 13px;">While the car=
was up in the air, I noticed a leak around the plug which holds the pump a=
ssembly in place. So, I removed the pump, careful to keep all the pie=
ces 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 ca=
talog), with a new gasket. I thought I had all of the pieces of the p=
ump assembly (items 62-66 in the Moss diagram) in the right order when I re=
installed it, but when I took the car out for a test drive, the overdrive w=
ould not engage.</div><div class=3D"ydp626bf091yahoo-style-wrap" style=3D"f=
ont-family: Helvetica Neue, Helvetica, Arial, sans-serif; font-size: 13px;"=
><br></div><div class=3D"ydp626bf091yahoo-style-wrap" style=3D"font-family:=
Helvetica Neue, Helvetica, Arial, sans-serif; font-size: 13px;">In additio=
n 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. T=
he Moss diagram, however, is different than my overdrive unit. Moss s=
ays their diagram is for cars from 1968 to 1980, but apparently, some thing=
s were changed during that time frame. I can't believe the engineers =
would let anything go unchanged for 12 years! It looks like the plung=
er (Moss part number 466-305) shown in the Moss catalog diagram has a rolle=
r on the end of it. My plunger does not have a roller on the end of i=
t. Maybe this will give you a lead to which diagram I am looking for.=
<br></div><div class=3D"ydp626bf091yahoo-style-wrap" style=3D"font-family: =
Helvetica Neue, Helvetica, Arial, sans-serif; font-size: 13px;"><br></div><=
div class=3D"ydp626bf091yahoo-style-wrap" style=3D"font-family: Helvetica N=
eue, Helvetica, Arial, sans-serif; font-size: 13px;">So, that leaves me loo=
king for a good exploded diagram of the unit used in a 1971 model. Ca=
n anyone help with that, or does anyone have any suggestions as to what I m=
ight have done to make the overdrive not work, when it has always worked fi=
ne. Thanks.</div><div class=3D"ydp626bf091yahoo-style-wrap" style=3D"=
font-family: Helvetica Neue, Helvetica, Arial, sans-serif; font-size: 13px;=
"><br></div><div class=3D"ydp626bf091yahoo-style-wrap" style=3D"font-family=
: Helvetica Neue, Helvetica, Arial, sans-serif; font-size: 13px;">Jack Whee=
ler<br></div></body></html>
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