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Or:
Using a relay for latching, you may consider using just a (non-latching)
pushbutton to engage the O/D.
Assuming the O/D works only on 3rd and 4th gear, you don't even need a
(second, NC pushbutton) switch to disengage the O/D.
Just move the gear lever to between 3rd and 4th and then just a very
short time to the left to let the relay disengage and thus to have the
O/D disengage.
(Similar as in my 1972 Sunbeam Sceptre. In that car, there is a stalk to
the R/H side of the steering column.
Stalk momentarily down =3D engage; momentarily up =3D disengage. I never u=
se
the "momentarily up" function;
I always disengage as just described. Very convenient!)
Bert
70 B
Op 11-11-2019 om 17:08 schreef Charley Robinson via Mgs:
> I've swapped OD gearboxes into two CBBs.=C2=A0 In both cases I used the
> gear levers from the original non-OD transmissions.=C2=A0 I don't see an=
y
> reason that you can't use the gear lever you already have for the OD box=
.
>
> As to the OD switch, I'd put it on the dash if I had an open spot for
> it that was handy to my right hand.=C2=A0 In the CB cars the wiring and
> switch are already installed but there's no reason you can't find the
> white circuit that Paul mentioned and run a wire from it to your
> switch and from the switch to the lockout switch on the OD box.=C2=A0 Lo=
oks
> like there are a couple of switches in the Moss catalog that would
> look OK on the dash.=C2=A0 The switch is just a SPST that can handle the
> solenoid current.
>
> My $ .02,
>
> CR
>
> On 11/11/2019 7:35 AM, Andrew Lundgren via Mgs wrote:
>> I have a '78. The transmission is a blue label, but the seller
>> doesn't have the shift lever.
>>
>> A lever for a '78 is not a cheap thing, and my son who is driving it
>> a lot right now likes the Walnut MG logo shifter it has.=C2=A0 So I'm
>> looking at options for how to install the O/D switch.
>>
>> From the moss catalog, it looks like the '76 switch won't work with
>> the '78. So I might have to buy the parts to put together the shifter
>> switch or put it in the blank accessory switch above the fan on the
>> dash.
>>
>>
>>
>> On Mon, Nov 11, 2019, 1:45 AM PaulHunt73 <paulhunt73@virginmedia.com
>>
>> None of that is=C2=A0to do with the OD itself.
>> Which gears it operated on is a function of the linkages on top
>> of the gearbox, and you can have it on 3 and 4 or 4 only as you
>> wish. When the TCSA=C2=A0was introduced in late 76 to control
>> 'surging'=C2=A0a third switch was added to the top of the gearbox t=
hat
>> operated in 2nd and 4th, and this was wired in series with the OD
>> switch operating in 3rd and 4th to produce a 4th gear only output
>> controlling the TCSA and vacuum advance.=C2=A0 I suspect that was n=
ot
>> very reliable as it was an external micro-switch so it was
>> deleted and the gearbox components changed so the switch
>> operated=C2=A0in 4th only,=C2=A0as done to the V8=C2=A0several year=
s
>> previously.=C2=A0 The gearbox switch now controlled both OD and TCS=
A.
>> The gear=C2=A0lever itself changed for the 77 model year to
>> incorporate the OD manual switch,=C2=A0but that can also be fitted =
to
>> any year, or the 77 converted back to some other switch, as you wis=
h.
>> The wiring prior to 77 was from the manual switch on the dash or
>> the column, to the gearbox switch on a yellow and a yellow red,
>> then from there to the solenoid.=C2=A0 For 77 on it was from the
>> ignition supply on a white to the gearbox switch, then from there
>> to the manual switch on the gear lever, and from there to the
>> solenoid.
>> Black label or blue label determines which speedo is compatible -
>> black label was used on CB cars and used a 1280tpm speedo.=C2=A0 Bl=
ue
>> label was used on RB cars and used a 1000tpm speedo.=C2=A0 But spee=
dos
>> can be recalibrated if you end up with the wrong combination.
>> So as a 78 it should have a blue label OD and the manual switch
>> on the gear lever, as the column switch - which together with the
>> plastic dash was new for the 77 model year -=C2=A0won't have that
>> function.=C2=A0 But=C2=A0if the car has the earlier RB dash and col=
umn
>> switches you don't need the gear lever switch, which is prone to
>> shorting out and causing harness damage.
>> PaulH.
>>
>> ----- Original Message -----
>> Not so much. It will be a a bit still until the transmission
>> arrives. (Freight from NY to UT) I'm just trying to figure
>> out which shifter it should have had as well as which gears
>> it should work on.
>>
>> I'm going to be putting it into a 78, but the current owner
>> is still trying to track down the shifter from his friend,
>> the previous owner. He doesn't know if it was a late shifter
>> or an early one.
>>
>> I'm trying to determine how to wire it in.
>>
>>
>> _______________________________________________
>>
>> Mgs@autox.team.net
>> Donate:http://www.team.net/donate.html
>> Suggested annual donation $12.75
>>
>> Archive:http://www.team.net/pipermail/mgs http://autox.team.net/archiv=
e
>>
>> Unsubscribe:http://autox.team.net/mailman/options/mgs/charley38@twc.com
>
>
> _______________________________________________
>
> Mgs@autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation $12.75
>
> Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive
>
> Unsubscribe: http://autox.team.net/mailman/options/mgs/palte@gmx.net
--------------4AFFB507C5CE4EBE617E3E90
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DUTF-=
8">
</head>
<body text=3D"#000000" bgcolor=3D"#FFFFFF">
<p><font size=3D"-1" color=3D"#003300">Or:<br>
</font></p>
<p><font size=3D"-1" color=3D"#003300">Using a relay for latching, you
may consider using just a (non-latching) pushbutton to engage
the O/D.</font></p>
<p><font size=3D"-1" color=3D"#003300">Assuming the O/D works only on
3rd and 4th gear, you don't even need a (second, NC pushbutton)
switch to disengage the O/D.</font></p>
<p><font size=3D"-1" color=3D"#003300">Just move the gear lever to
between 3rd and 4th and then just a very short time to the left
to let the relay disengage and thus to have the O/D disengage.</fo=
nt></p>
<p><font size=3D"-1" color=3D"#003300"><br>
</font></p>
<p><font size=3D"-1" color=3D"#003300"><br>
</font></p>
<p><font size=3D"-1" color=3D"#003300">(Similar as in my 1972 Sunbeam
Sceptre. In that car, there is a stalk to the R/H side of the
steering column.</font></p>
<p><font size=3D"-1" color=3D"#003300">Stalk momentarily down =3D enga=
ge;
momentarily up =3D disengage. I never use the "momentarily up"
function; <br>
</font></p>
<p><font size=3D"-1" color=3D"#003300">I always disengage as just
described. Very convenient!) <br>
</font></p>
<p><font size=3D"-1" color=3D"#003300"><br>
</font></p>
<p><font size=3D"-1" color=3D"#003300">Bert</font></p>
<p><font size=3D"-1" color=3D"#003300">70 B</font><br>
</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<div class=3D"moz-cite-prefix">Op 11-11-2019 om 17:08 schreef Charley
Robinson via Mgs:<br>
</div>
<blockquote type=3D"cite"
cite=3D"mid:4318b77a-b906-0429-3761-647a95225615@twc.com">
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DUT=
F-8">
I've swapped OD gearboxes into two CBBs.=C2=A0 In both cases I used =
the
gear levers from the original non-OD transmissions.=C2=A0 I don't se=
e
any reason that you can't use the gear lever you already have for
the OD box.=C2=A0 <br>
<br>
As to the OD switch, I'd put it on the dash if I had an open spot
for it that was handy to my right hand.=C2=A0 In the CB cars the wir=
ing
and switch are already installed but there's no reason you can't
find the white circuit that Paul mentioned and run a wire from it
to your switch and from the switch to the lockout switch on the OD
box.=C2=A0 Looks like there are a couple of switches in the Moss
catalog that would look OK on the dash.=C2=A0 The switch is just a S=
PST
that can handle the solenoid current.<br>
<br>
My $ .02,<br>
<br>
CR<br>
<br>
<div class=3D"moz-cite-prefix">On 11/11/2019 7:35 AM, Andrew
Lundgren via Mgs wrote:<br>
</div>
<blockquote type=3D"cite"
cite=3D"mid:CAKr3Jn3bgMytp+pr8TqSvN0HkkFi=3DRjejm5rKVT=3D9Kej5L9juQ@mail.g=
mail.com">
<meta http-equiv=3D"content-type" content=3D"text/html;
charset=3DUTF-8">
<div dir=3D"auto">I have a '78. The transmission is a blue label,
but the seller doesn't have the shift lever.
<div dir=3D"auto"><br>
</div>
<div dir=3D"auto">A lever for a '78 is not a cheap thing, and my
son who is driving it a lot right now likes the Walnut MG
logo shifter it has.=C2=A0 So I'm looking at options for how t=
o
install the O/D switch.=C2=A0</div>
<div dir=3D"auto"><br>
</div>
<div dir=3D"auto">From the moss catalog, it looks like the '76
switch won't work with the '78. So I might have to buy the
parts to put together the shifter switch or put it in the
blank accessory switch above the fan on the dash.=C2=A0=C2=A0<=
/div>
<div dir=3D"auto"><br>
</div>
<div dir=3D"auto"><br>
</div>
</div>
<br>
<div class=3D"gmail_quote">
<div dir=3D"ltr" class=3D"gmail_attr">On Mon, Nov 11, 2019, 1:45
AM PaulHunt73 <<a
href=3D"mailto:paulhunt73@virginmedia.com";
moz-do-not-send=3D"true">paulhunt73@virginmedia.com</a>>
wrote:<br>
</div>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor=3D"#ffffff">
<div><font size=3D"2">None of that is=C2=A0to do with the OD
itself.</font></div>
<div>=C2=A0</div>
<div><font size=3D"2">Which gears it operated on is a
function of the linkages on top of the gearbox, and
you can have it on 3 and 4 or 4 only as you wish.=C2=A0
When the TCSA=C2=A0was introduced in late 76 to control
'surging'=C2=A0a third switch was added to the top of th=
e
gearbox that operated in 2nd and 4th, and this was
wired in series with the OD switch operating in 3rd
and 4th to produce a 4th gear only output controlling
the TCSA and vacuum advance.=C2=A0 I suspect that was no=
t
very reliable as it was an external micro-switch so it
was deleted and the gearbox components changed so the
switch operated=C2=A0in 4th only,=C2=A0as done to the V8=
=C2=A0several
years previously.=C2=A0 The gearbox switch now controlle=
d
both OD and TCSA.=C2=A0 </font></div>
<div>=C2=A0</div>
<div><font size=3D"2">The gear=C2=A0lever itself changed for=
the
77 model year to incorporate the OD manual switch,=C2=A0=
but
that can also be fitted to any year, or the 77
converted back to some other switch, as you wish.</font>=
</div>
<div>=C2=A0</div>
<div><font size=3D"2">The wiring prior to 77 was from the
manual switch on the dash or the column, to the
gearbox switch on a yellow and a yellow red, then from
there to the solenoid.=C2=A0 For 77 on it was from the
ignition supply on a white to the gearbox switch, then
from there to the manual switch on the gear lever, and
from there to the solenoid.</font></div>
<div>=C2=A0</div>
<div><font size=3D"2">Black label or blue label determines
which speedo is compatible - black label was used on
CB cars and used a 1280tpm speedo.=C2=A0 Blue label was
used on RB cars and used a 1000tpm speedo.=C2=A0 But
speedos can be recalibrated if you end up with the
wrong combination.=C2=A0</font></div>
<div>=C2=A0</div>
<div><font size=3D"2">So as a 78 it should have a blue label
OD and the manual switch on the gear lever, as the
column switch - which together with the plastic dash
was new for the 77 model year -=C2=A0won't have that
function.=C2=A0 But=C2=A0if the car has the earlier RB d=
ash and
column switches you don't need the gear lever switch,
which is prone to shorting out and causing harness
damage.</font></div>
<div>=C2=A0</div>
<div><font size=3D"2">PaulH.</font></div>
<div>=C2=A0</div>
<blockquote style=3D"BORDER-LEFT:#000000 2px
solid;PADDING-LEFT:5px;PADDING-RIGHT:0px;MARGIN-LEFT:5px;MARGIN-RIGHT:0px"=
>
<div style=3D"FONT:10pt arial">----- Original Message
----- </div>
<div dir=3D"auto">Not so much. It will be a a bit still
until the transmission arrives. (Freight from NY to
UT) I'm just trying to figure out which shifter it
should have had as well as which gears it should work
on.=C2=A0=C2=A0
<div dir=3D"auto"><br>
</div>
<div dir=3D"auto">I'm going to be putting it into a 78,
but the current owner is still trying to track down
the shifter from his friend, the previous owner. He
doesn't know if it was a late shifter or an early
one.</div>
<div dir=3D"auto"><br>
</div>
<div dir=3D"auto">I'm trying to determine how to wire it
in.</div>
</div>
</blockquote>
</div>
</blockquote>
</div>
<br>
<fieldset class=3D"mimeAttachmentHeader"></fieldset>
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____________________
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</pre>
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