Subject: Re: [TR] Speedometer drive in J-type OD

From: DAVID MASSEY <[email-masked]>
Date: Tue, 28 May 2019 11:33:57 +0000 (UTC)

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 Hello, Mark.=C2=A0 Long time, no hear from.=C2=A0 My answers are yes, no, =
I don't know.

Yes you can pull the gear without removing the OD.=C2=A0 There is a small b=
olt that holds the cable attachment piece.=C2=A0 Once that is removed you c=
an withdraw the piece and the gear.
No, you will not get a flood of oil, this is all above the "water line."
I don't know which gear you need=C2=A0 off hand but I believe that 72 was b=
efore the conversion to the "1000 turns-per-mile" standard found on the lat=
er models which means they all got the same gear and the speedometers were =
calibrated to suit.=C2=A0 You can verify that by looking at the the speedom=
eter face near the bottom and you will find a number something like "1120" =
or "1000."=C2=A0 This will tell you which gear you need.=C2=A0 For what it'=
s worth, The Roadster Factory lists part number 147965 for models up to CF1=
 and UKC5933 for models CF1 and later.
On the other hand, it is possible that the end of the speedo cable itself i=
s at fault.=C2=A0 It may have rounded off or broke and your gear may be OK =
after all.=C2=A0 Or, since you have overdrive, you have a right-angle drive=
 and that might be at fault.=C2=A0 That part is 120694.
Let us know what you find.
=20
Dave=20

=20
=20
-----Original Message-----
From: Mark Hooper <[email-masked]>
To: triumphs <[email-masked]>
Sent: Mon, May 27, 2019 10:38 pm
Subject: [TR] Speedometer drive in J-type OD

Hello oh List:=C2=A0My 72 TR6's speedometer has stopped working completely.=
 It was jumping more and more wildly and now is completely dead.=C2=A0Since=
 the cable seems to turn freely in the casing I'm pretty certain the drive =
gear down below has just lost too many teeth to engage. Memory tells me the=
 drive is plastic. I have a J-type OD in my car. I ordered it built up by t=
he Laycock de Normanville descendants who work (I am told) with the origina=
l tooling. I had it done with the Volvo gearing (1.25). Three=C2=A0question=
s:=C2=A01 - Can I pull the gear out without having to remove the OD ? It lo=
oks like it's removable.=C2=A02 - Will I end up with a flood of transmissio=
n oil all over the place. i.e. should I drain it first?=C2=A03 - How do I c=
ount/measure to know which replacement gear to buy?=C2=A0Thanks in advance =
for any helpful advice out there.=C2=A0Mark Hooper1972 TR6
=C2=A0
** [email-masked] **

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<div style=3D"color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <font size=3D"3">Hello, Mark.&nbsp; Long time, no hear from.&nbsp; My=
 answers are yes, no, I don't know.<br>
</font></div>

<div><font size=3D"3"><br>
</font></div>

<div><font size=3D"3">Yes you can pull the gear without removing the OD.&nb=
sp; There is a small bolt that holds the cable attachment piece.&nbsp; Once=
 that is removed you can withdraw the piece and the gear.</font></div>

<div><font size=3D"3"><br>
</font></div>

<div><font size=3D"3">No, you will not get a flood of oil, this is all abov=
e the "water line."</font></div>

<div><font size=3D"3"><br>
</font></div>

<div><font size=3D"3">I don't know which gear you need&nbsp; off hand but I=
 believe that 72 was before the conversion to the "1000 turns-per-mile" sta=
ndard found on the later models which means they all got the same gear and =
the speedometers were calibrated to suit.&nbsp; You can verify that by look=
ing at the the speedometer face near the bottom and you will find a number =
something like "1120" or "1000."&nbsp; This will tell you which gear you ne=
ed.&nbsp; For what it's worth, The Roadster Factory lists part number 14796=
5 for models up to CF1 and UKC5933 for models CF1 and later.</font></div>

<div><font size=3D"3"><br>
</font></div>

<div><font size=3D"3">On the other hand, it is possible that the end of the=
 speedo cable itself is at fault.&nbsp; It may have rounded off or broke an=
d your gear may be OK after all.&nbsp; Or, since you have overdrive, you ha=
ve a right-angle drive and that might be at fault.&nbsp; That part is 12069=
4.</font></div>

<div><font size=3D"3"><br>
</font></div>

<div><font size=3D"3">Let us know what you find.</font><br>
</div>

<div> <br>
</div>

<div style=3D"clear:both"><font size=3D"4">Dave </font><br>
<br>
</div>

<div> <br>
</div>

<div> <br>
</div>

<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black">-----=
Original Message-----<br>
From: Mark Hooper &lt;[email-masked]&gt;<br>
To: triumphs &lt;[email-masked]&gt;<br>
Sent: Mon, May 27, 2019 10:38 pm<br>
Subject: [TR] Speedometer drive in J-type OD<br>
<br>

<div id=3D"yiv8068293340">
<div>

<div style=3D"font-size:13.3333px;font-family:tahoma;color:rgb(0, 0, 0);fon=
t-weight:400;font-style:normal;background:none 0% 0% auto repeat scroll;">H=
ello oh List:</div>

<div style=3D"font-size:13.3333px;font-family:tahoma;color:rgb(0, 0, 0);fon=
t-weight:400;font-style:normal;background:none 0% 0% auto repeat scroll;">&=
nbsp;</div>

<div style=3D"font-size:13.3333px;font-family:tahoma;color:rgb(0, 0, 0);fon=
t-weight:400;font-style:normal;background:none 0% 0% auto repeat scroll;">M=
y 72 TR6's speedometer has stopped working completely. It was jumping more =
and more wildly and now is completely dead.&nbsp;Since the cable seems to t=
urn freely in the casing I'm pretty certain the drive gear down below has j=
ust lost too many teeth to engage. Memory tells me the drive is plastic. I =
have a J-type OD in my car. I ordered it built up by the Laycock de Normanv=
ille descendants who work (I am told) with the original tooling. I had it d=
one with the Volvo gearing (1.25). Three&nbsp;questions:</div>

<div style=3D"font-size:13.3333px;font-family:tahoma;color:rgb(0, 0, 0);fon=
t-weight:400;font-style:normal;background:none 0% 0% auto repeat scroll;">&=
nbsp;</div>

<div style=3D"font-size:13.3333px;font-family:tahoma;color:rgb(0, 0, 0);fon=
t-weight:400;font-style:normal;background:none 0% 0% auto repeat scroll;">1=
 - Can I pull the gear out without having to remove the OD ? It looks like =
it's removable.</div>

<div style=3D"font-size:13.3333px;font-family:tahoma;color:rgb(0, 0, 0);fon=
t-weight:400;font-style:normal;background:none 0% 0% auto repeat scroll;">&=
nbsp;</div>

<div style=3D"font-size:13.3333px;font-family:tahoma;color:rgb(0, 0, 0);fon=
t-weight:400;font-style:normal;background:none 0% 0% auto repeat scroll;">2=
 - Will I end up with a flood of transmission oil all over the place. i.e. =
should I drain it first?</div>

<div style=3D"font-size:13.3333px;font-family:tahoma;color:rgb(0, 0, 0);fon=
t-weight:400;font-style:normal;background:none 0% 0% auto repeat scroll;">&=
nbsp;</div>

<div style=3D"font-size:13.3333px;font-family:tahoma;color:rgb(0, 0, 0);fon=
t-weight:400;font-style:normal;background:none 0% 0% auto repeat scroll;">3=
 - How do I count/measure to know which replacement gear to buy?</div>

<div style=3D"font-size:13.3333px;font-family:tahoma;color:rgb(0, 0, 0);fon=
t-weight:400;font-style:normal;background:none 0% 0% auto repeat scroll;">&=
nbsp;</div>

<div style=3D"font-size:13.3333px;font-family:tahoma;color:rgb(0, 0, 0);fon=
t-weight:400;font-style:normal;background:none 0% 0% auto repeat scroll;">T=
hanks in advance for any helpful advice out there.</div>

<div style=3D"font-size:13.3333px;font-family:tahoma;color:rgb(0, 0, 0);fon=
t-weight:400;font-style:normal;background:none 0% 0% auto repeat scroll;">&=
nbsp;</div>

<div style=3D"font-size:13.3333px;font-family:tahoma;color:rgb(0, 0, 0);fon=
t-weight:400;font-style:normal;background:none 0% 0% auto repeat scroll;">M=
ark Hooper</div>

<div style=3D"font-size:13.3333px;font-family:tahoma;color:rgb(0, 0, 0);fon=
t-weight:400;font-style:normal;background:none 0% 0% auto repeat scroll;">1=
972 TR6</div>

<div class=3D"yiv8068293340yqt9910838661" id=3D"yiv8068293340yqtfd82555">
<div style=3D"font-family:tahoma;color:rgb(0, 0, 0);font-size:13.3333px;fon=
t-weight:400;font-style:normal;background:none 0% 0% auto repeat scroll;">
<blockquote class=3D"yiv8068293340as91pFk8AX8sDPOUp66RUy8IoCRjefxNG8oLk8fg"=
 style=3D"PADDING-RIGHT:0px;PADDING-LEFT:5px;MARGIN-LEFT:5px;BORDER-LEFT:#0=
00000 2px solid;MARGIN-RIGHT:0px;">

<div style=3D"font-family:arial, helvetica;font-size:10pt;color:black;">&nb=
sp;</div>

</blockquote>
</div>

</div>
</div>
</div>

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