Subject: [Roadsters] 5-Speed Transmission Speedometer Pinion Carrier

From: RWM via Datsun-roadsters <[email-masked]>
Date: Wed, 28 Apr 2021 13:59:49 -0400

Any ideas on why a 5-speed speedometer pinion carrier would refuse to 
budge from the side of the transmission (so pinion and carrier can be 
replaced with correct # teeth and alternate carrier)?

The locking tab was removed, but the pinion carrier will not rotate CCW.

Pinion carrier hasn't been removed in 50 years, but trying to think of a 
reason it would not unscrew.

TIA.

- Bob Mann, '68 2000 Solex

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From: Scott Sheeler via Datsun-roadsters <[email-masked]>
Date: Wed, 28 Apr 2021 18:22:15 +0000

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Bob,

It doesn't unscrew - it just slides in the side of the case and is sealed b=
y an o ring.  The pinion is secured in the sleeve by a small spilt pin.

>From Part II of the Datsun Roadster Book.

Remove the speedometer drive gear by releasing the set bolt and retainer pl=
ate from the side of the tail shaft housing.  Pull the speedometer drive sl=
eeve out of the casing.  Inspect the plastic gear for wear and replace it i=
f the teeth are damaged.  Do this by driving the teeny split pin out of the=
 side of the sleeve.  If you replace the gear, you can also renew the seal =
that is inside the sleeve.  Replace the outer sleeve o-ring.  Oil the o-rin=
g to ease assembly into the tail shaft housing, reinsert the sleeve, and se=
cure the retaining plate in the sleeve=92s notch with the set bolt and lock=
 washer.

Scott Sheeler

________________________________
From: Datsun-roadsters <[email-masked]> on behalf =
of RWM via Datsun-roadsters <[email-masked]>
Sent: Wednesday, April 28, 2021 11:59 AM
To: 'Datsun Roadster List' <[email-masked]>
Subject: [Roadsters] 5-Speed Transmission Speedometer Pinion Carrier

TIA.

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<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
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Bob,</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);">
<br>
</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);">
It doesn't unscrew - it just slides in the side of the case and is sealed b=
y an o ring.&nbsp; The pinion is secured in the sleeve by a small spilt pin=
.</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);">
<br>
</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);">
>From Part II of the Datsun Roadster Book.</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);">
<br>
</div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
 color: rgb(0, 0, 0);">
<p class=3D"MsoNormal" style=3D"margin:0in;font-size:10pt;font-family:Arial=
, sans-serif">
<span style=3D"font-size:9.0pt">Remove the speedometer drive gear by releas=
ing the set bolt and retainer plate from the side of the tail shaft housing=
.<span style=3D"mso-spacerun:yes">&nbsp;
</span>Pull the speedometer drive sleeve out of the casing.<span style=3D"m=
so-spacerun:yes">&nbsp;
</span>Inspect the plastic gear for wear and replace it if the teeth are da=
maged.<span style=3D"mso-spacerun:yes">&nbsp;
</span>Do this by driving the teeny split pin out of the side of the sleeve=
.<span style=3D"mso-spacerun:yes">&nbsp;
</span>If you replace the gear, you can also renew the seal that is inside =
the sleeve.<span style=3D"mso-spacerun:yes">&nbsp;
</span>Replace the outer sleeve o-ring.<span style=3D"mso-spacerun:yes">&nb=
sp; </span>Oil the o-ring to ease assembly into the tail shaft housing, rei=
nsert the sleeve, and secure the retaining plate in the sleeve=92s notch wi=
th the set bolt and lock washer.<o:p>&nbsp;</o:p></span></p>
<br>
</div>
<div>
<div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;=
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<p style=3D"margin-top:0px; margin-bottom:0px; margin-top:0; margin-bottom:=
0">Scott Sheeler</p>
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<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" co=
lor=3D"#000000" style=3D"font-size:11pt"><b>From:</b> Datsun-roadsters &lt;=
[email-masked]&gt; on behalf of RWM via Datsun-roa=
dsters &lt;[email-masked]&gt;<br>
<b>Sent:</b> Wednesday, April 28, 2021 11:59 AM<br>
<b>To:</b> 'Datsun Roadster List' &lt;[email-masked]&gt;<b=
r>
<b>Subject:</b> [Roadsters] 5-Speed Transmission Speedometer Pinion Carrier=
</font>
<div>&nbsp;</div>
</div>
<div class=3D"BodyFragment"><font size=3D"2"><span style=3D"font-size:11pt"=
<div class=3D"PlainText">Any ideas on why a 5-speed speedometer pinion carr=
ier would refuse to
<br>
budge from the side of the transmission (so pinion and carrier can be <br>
replaced with correct # teeth and alternate carrier)?<br>
<br>
The locking tab was removed, but the pinion carrier will not rotate CCW.<br=
<br>
Pinion carrier hasn't been removed in 50 years, but trying to think of a <b=
r>
reason it would not unscrew.<br>
<br>
TIA.<br>
<br>
- Bob Mann, '68 2000 Solex<br>
<br>
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