Subject: Re: [Fot] 1966 TR4a transmission help

From: Tony Garmey via Fot <[email-masked]>
Date: Wed, 22 Oct 2025 14:31:32 +0000

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_______________________________________________
[email-masked]

http://www.fot-racing.com

Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot

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From: Bob Kramer Gmail via Fot <[email-masked]>
Date: Wed, 22 Oct 2025 10:07:50 -0500

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All great advice. Another easy approach is to add  vent to the cover on the b=
oss where the TR2 dipstick once lives. These are sold online:

You only get one chance at life, make it a TRIUMPH.

> On Oct 22, 2025, at 9:56=E2=80=AFAM, Tony Garmey via Fot <[email-masked]=
et> wrote:
>=20
> =EF=BB=BF The oem vent is a small hole in the tail shaft under the shift t=
ower.
> If your sure that the o rings are leaking - go ahead and pop of the gearbo=
x top and =E2=80=A6
> *Add a dash4 fitting for a vent=20
> *drill and lock wire the set screws that loc the selector forks to the rai=
ls
> * tach weld the centre blade at the end of the rail .
> * change the o rings=20
>=20
> British frame and engine for the majority of the engine parts.=20
>=20
>=20
>=20
> Sent from my iPhone
>=20
>>> On Oct 22, 2025, at 7:23=E2=80=AFAM, mhmolson--- via Fot <[email-masked]=
.net> wrote:
>>>=20
>> =EF=BB=BF
>> Good morning, I have an issue with transmission oil leaking out of the th=
ree o ring seals where the transmission selector shafts enter the top cover.=
 This only happens during high rpms. This is an overdrive unit.
>> Has anyone added additional venting to the top cover. I understand there i=
s possibly a small vent hole in the front however I have not looked at this y=
et. I am also going to build a TR4 motor this winter and am looking for dire=
ction and contacts for pistons, liners, and rods. I am good at mechanical lo=
gistics, and I have built two strokes, I have also been around engine builde=
rs and understand, however this will be my first real build. Yes, I understa=
nd that certain things will be left to the pro=E2=80=99s
>> Help appreciated
>> Matt
>>=20
>>=20
>> Donate: http://www.team.net/donate.html
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/vintageclas=
[email-masked]
>>=20
>>=20
>=20
>=20
> Donate: http://www.team.net/donate.html
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/rkramer56@gm=
ail.com
>=20
>=20

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">All great advice. Another easy approach is t=
o add &nbsp;vent to the cover on the boss where the TR2 dipstick once lives.=
 These are sold online:<div><br><div><img src=3D"cid:CAC1D9A2-A99D-4D18-893B=
-399466854D43" alt=3D"image"></div><div><br></div><div><br id=3D"lineBreakAt=
BeginningOfSignature"><div dir=3D"ltr">You only get one chance at life, make=
 it a TRIUMPH.</div><div dir=3D"ltr"><br><blockquote type=3D"cite">On Oct 22=
, 2025, at 9:56=E2=80=AFAM, Tony Garmey via Fot &lt;[email-masked]&gt; w=
rote:<br><br></blockquote></div><blockquote type=3D"cite"><div dir=3D"ltr">=EF=
=BB=BF

<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-8">

The oem vent is a small hole in the tail shaft under the shift tower.
<div>If your sure that the o rings are leaking - go ahead and pop of the gea=
rbox top and =E2=80=A6</div>
<div>*Add a dash4 fitting for a vent&nbsp;</div>
<div>*drill and lock wire the set screws that loc the selector forks to the r=
ails</div>
<div>* tach weld the centre blade at the end of the rail .</div>
<div>* change the o rings&nbsp;</div>
<div><br>
</div>
<div>British frame and engine for the majority of the engine parts.&nbsp;</d=
iv>
<div><br>
</div>
<div><br>
</div>
<div><br id=3D"lineBreakAtBeginningOfSignature">
<div dir=3D"ltr">Sent from my iPhone</div>
<div dir=3D"ltr"><br>
<blockquote type=3D"cite">On Oct 22, 2025, at 7:23=E2=80=AFAM, mhmolson--- v=
ia Fot &lt;[email-masked]&gt; wrote:<br>
<br>
</blockquote>
</div>
<blockquote type=3D"cite">
<div dir=3D"ltr">=EF=BB=BF
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Good morning, I have=
 an issue with transmission oil leaking out of the three o ring seals where t=
he transmission selector shafts enter the top cover. This only happens durin=
g high rpms. This is an overdrive
 unit.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Has anyone added add=
itional venting to the top cover. I understand there is possibly a small ven=
t hole in the front however I have not looked at this yet. I am also going t=
o build a TR4 motor this winter and
 am looking for direction and contacts for pistons, liners, and rods. I am g=
ood at mechanical logistics, and I have built two strokes, I have also been a=
round engine builders and understand, however this will be my first real bui=
ld. Yes, I understand that certain
 things will be left to the pro=E2=80=99s<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Help appreciated<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Matt<o:p></o:p></spa=
n></p>
</div>
<div>&lt;IMG_2832.jpg&gt;</div>
<span>_______________________________________________</span><br>
<span>[email-masked]</span><br>
<span></span><br>
<span>http://www.fot-racing.com</span><br>
<span></span><br>
<span>Donate: http://www.team.net/donate.html</span><br>
<span>Archive: http://autox.team.net/archive http://www.team.net/pipermail/f=
ot</span><br>
<span>Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/vintagec=
[email-masked]</span><br>
<span></span><br>
<span></span><br>
</div>
</blockquote>
</div>

<span>_______________________________________________</span><br><span>fot@au=
tox.team.net</span><br><span></span><br><span>http://www.fot-racing.com</spa=
n><br><span></span><br><span>Donate: http://www.team.net/donate.html</span><=
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l/fot</span><br><span>Unsubscribe/Manage: http://autox.team.net/mailman/opti=
ons/fot/[email-masked]</span><br><span></span><br><span></span><br></di=
v></blockquote></div></div></body></html>=

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From: DAVE HOGYE via Fot <[email-masked]>
Date: Wed, 22 Oct 2025 09:01:55 -0700 (PDT)

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Yes, do as Tony suggests. =20
The set screws have been known to back out and drop into the works or, the =
square end breaks off and falls into the works.  This can immediately stop =
rotation of the works and the rear tires.
The end of the center shift rail can pull out of the rail.  I have seen thi=
s.  A tach weld will secure the end in place.
One more tip to help stop leaks.  Be aware that just about every threaded b=
olt hole in the case goes through the case.  Sealant should be used, or lea=
ks will be plenty.  The 4 input shaft bearing carrier bolt holes also go th=
rough the case.  They will leak without sealant. =20
The engine block is like this too.  A number of bolt holes go through the b=
lock.  They all need sealant.  Like the two coil bracket holes and the gene=
rator/alternator bracket.  I prefer to not mount the coil on the engine, so=
 I use crush washers under the bolts there. =20
Stay connected with the group during your project and good luck.
The FoT archives is also a great resource for tips. =20
=20
Dave H.
=20
=20

> On 10/22/2025 7:31 AM PDT Tony Garmey via Fot <[email-masked]> wrote:
> =20
> =20
> If your sure that the o rings are leaking - go ahead and pop of the gearb=
ox top and =E2=80=A6
> *drill and lock wire the set screws that loc the selector forks to the ra=
ils
> > On Oct 22, 2025, at 7:23=E2=80=AFAM, mhmolson--- via Fot <[email-masked]=
m.net> wrote:
> >=20
> >=20
>=20
> >=20
> > Good morning, I have an issue with transmission oil leaking out of the =
three o ring seals where the transmission selector shafts enter the top cov=
er. This only happens during high rpms. This is an overdrive unit.
> >=20
> > Has anyone added additional venting to the top cover. I understand ther=
e is possibly a small vent hole in the front however I have not looked at t=
his yet. I am also going to build a TR4 motor this winter and am looking fo=
r direction and contacts for pistons, liners, and rods. I am good at mechan=
ical logistics, and I have built two strokes, I have also been around engin=
e builders and understand, however this will be my first real build. Yes, I=
 understand that certain things will be left to the pro=E2=80=99s
> > Archive: http://autox.team.net/archive http://www.team.net/pipermail/fo=
t
> > Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/vintagecl=
[email-masked]
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/dlhogye@com=
cast.net

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<!doctype html>
<html>
 <head>=20
  <meta charset=3D"UTF-8">=20
 </head>
 <body>
  <div style=3D"font-size: 12pt; font-family: helvetica,arial,sans-serif; c=
olor: #333333;">
   <span style=3D"font-family: helvetica; font-size: 12pt;">Yes, do as Tony=
 suggests.&nbsp;&nbsp;</span>
  </div>=20
  <div class=3D"default-style" style=3D"font-size: 12pt; font-family: helve=
tica,arial,sans-serif; color: #333333;">
   <span style=3D"font-family: helvetica; font-size: 12pt;">The set screws =
have been known to back out and drop into the works or, the square end brea=
ks off and falls into the works.&nbsp; This can immediately stop rotation o=
f the works and the rear tires.</span>
  </div>=20
  <div class=3D"default-style" style=3D"font-size: 12pt; font-family: helve=
tica,arial,sans-serif; color: #333333;">
   <span style=3D"font-family: helvetica; font-size: 12pt;">The end of the =
center shift rail can pull out of the rail.&nbsp; I have seen this.&nbsp; A=
 tach weld will secure the end in place.</span>
  </div>=20
  <div class=3D"default-style" style=3D"font-size: 12pt; font-family: helve=
tica,arial,sans-serif; color: #333333;">
   <span style=3D"font-family: helvetica; font-size: 12pt;">One more tip to=
 help stop leaks.&nbsp; Be aware that just about every threaded bolt hole i=
n the case goes through the case.&nbsp; Sealant should be used, or leaks wi=
ll be plenty.&nbsp; The 4 input shaft bearing carrier bolt holes also go th=
rough the case.&nbsp; They will leak without sealant.&nbsp;&nbsp;</span>
  </div>=20
  <div class=3D"default-style" style=3D"font-size: 12pt; font-family: helve=
tica,arial,sans-serif; color: #333333;">
   <span style=3D"font-family: helvetica; font-size: 12pt;">The engine bloc=
k is like this too.&nbsp; A number of bolt holes go through the block.&nbsp=
; They all need sealant.&nbsp; Like the two coil bracket holes and the gene=
rator/alternator bracket.&nbsp; I prefer to not mount the coil on the engin=
e, so I use crush washers under the bolts there.&nbsp;&nbsp;</span>
  </div>=20
  <div class=3D"default-style" style=3D"font-size: 12pt; font-family: helve=
tica,arial,sans-serif; color: #333333;">
   <span style=3D"font-family: helvetica; font-size: 12pt;">Stay connected =
with the group during your project and good luck.</span>
  </div>=20
  <div class=3D"default-style" style=3D"font-size: 12pt; font-family: helve=
tica,arial,sans-serif; color: #333333;">
   <span style=3D"font-family: helvetica; font-size: 12pt;">The FoT archive=
s is also a great resource for tips.&nbsp;&nbsp;</span>
  </div>=20
  <div class=3D"default-style" style=3D"font-size: 12pt; font-family: helve=
tica,arial,sans-serif; color: #333333;">
   &nbsp;
  </div>=20
  <div class=3D"default-style" style=3D"font-size: 12pt; font-family: helve=
tica,arial,sans-serif; color: #333333;">
   <span style=3D"font-family: helvetica; font-size: 12pt;">Dave H. </span>
  </div>=20
  <div class=3D"default-style" style=3D"font-size: 12pt; font-family: helve=
tica,arial,sans-serif; color: #333333;">
   &nbsp;
  </div>=20
  <div class=3D"default-style" style=3D"font-size: 12pt; font-family: helve=
tica,arial,sans-serif; color: #333333;">
   &nbsp;
  </div>=20
  <blockquote type=3D"cite">=20
   <div>
    On 10/22/2025 7:31 AM PDT Tony Garmey via Fot &lt;[email-masked]&gt=
; wrote:
   </div>=20
   <div>
    &nbsp;
   </div>=20
   <div>
    &nbsp;
   </div> The oem vent is a small hole in the tail shaft under the shift to=
wer.=20
   <div>
    If your sure that the o rings are leaking - go ahead and pop of the gea=
rbox top and =E2=80=A6
   </div>=20
   <div>
    *Add a dash4 fitting for a vent&nbsp;
   </div>=20
   <div>
    *drill and lock wire the set screws that loc the selector forks to the =
rails
   </div>=20
   <div>
    * tach weld the centre blade at the end of the rail .
   </div>=20
   <div>
    * change the o rings&nbsp;
   </div>=20
   <div>
    &nbsp;
   </div>=20
   <div>
    British frame and engine for the majority of the engine parts.&nbsp;
   </div>=20
   <div>
    &nbsp;
   </div>=20
   <div>
    &nbsp;
   </div>=20
   <div>
    <br id=3D"lineBreakAtBeginningOfSignature">=20
    <div dir=3D"ltr">
     Sent from my iPhone
    </div>=20
    <div dir=3D"ltr">
     <br>=20
     <blockquote type=3D"cite">
      On Oct 22, 2025, at 7:23=E2=80=AFAM, mhmolson--- via Fot &lt;fot@auto=
x.team.net&gt; wrote:
      <br>
      <br>
     </blockquote>=20
    </div>=20
    <blockquote type=3D"cite">=20
     <div dir=3D"ltr">=20
      <div class=3D"WordSection1">=20
       <p class=3D"MsoNormal"><span style=3D"font-size: 11.0pt;">Good morni=
ng, I have an issue with transmission oil leaking out of the three o ring s=
eals where the transmission selector shafts enter the top cover. This only =
happens during high rpms. This is an overdrive unit.</span></p>=20
       <p class=3D"MsoNormal"><span style=3D"font-size: 11.0pt;">Has anyone=
 added additional venting to the top cover. I understand there is possibly =
a small vent hole in the front however I have not looked at this yet. I am =
also going to build a TR4 motor this winter and am looking for direction an=
d contacts for pistons, liners, and rods. I am good at mechanical logistics=
, and I have built two strokes, I have also been around engine builders and=
 understand, however this will be my first real build. Yes, I understand th=
at certain things will be left to the pro=E2=80=99s</span></p>=20
       <p class=3D"MsoNormal"><span style=3D"font-size: 11.0pt;">Help appre=
ciated</span></p>=20
       <p class=3D"MsoNormal"><span style=3D"font-size: 11.0pt;">Matt</span=
></p>=20
      </div>=20
      <div>
       &lt;IMG_2832.jpg&gt;
      </div> _______________________________________________
      <br>[email-masked]
      <br>
      <br>http://www.fot-racing.com
      <br>
      <br>Donate: http://www.team.net/donate.html
      <br>Archive: http://autox.team.net/archive http://www.team.net/piperm=
ail/fot
      <br>Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/vin=
[email-masked]
      <br>
      <br>
      <br>
     </div>=20
    </blockquote>=20
   </div> _______________________________________________
   <br>[email-masked]
   <br>
   <br>http://www.fot-racing.com
   <br>
   <br>Donate: http://www.team.net/donate.html
   <br>Archive: http://autox.team.net/archive http://www.team.net/pipermail=
/fot
   <br>Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/dlhogy=
[email-masked]
   <br>
   <br>
   <br>
  </blockquote>
 </body>
</html>
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From: Robert Lang via Fot <[email-masked]>
Date: Wed, 22 Oct 2025 17:29:29 +0000 (UTC)

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 Great idea, Bob!
I used that boss to install a 3/8 NPT to AN6 adapter and run 3/8" hose to a=
 remote catch tank. Pretty mush zero tranny leakage with that setup.
But if you crank your engine to big RPM's, the transmission gets H-O-T and =
the pressure has to go somewhere.
Regards,sBob Lang
    On Wednesday, October 22, 2025 at 11:20:04 AM EDT, Bob Kramer Gmail via=
 Fot <[email-masked]> wrote: =20
=20
 All great advice. Another easy approach is to add =C2=A0vent to the cover =
on the boss where the TR2 dipstick once lives. These are sold online:

On Oct 22, 2025, at 9:56=E2=80=AFAM, Tony Garmey via Fot <[email-masked]=
t> wrote:

=EF=BB=BF
The oem vent is a small hole in the tail shaft under the shift tower.If you=
r sure that the o rings are leaking - go ahead and pop of the gearbox top a=
nd =E2=80=A6*Add a dash4 fitting for a vent=C2=A0*drill and lock wire the s=
et screws that loc the selector forks to the rails* tach weld the centre bl=
ade at the end of the rail .* change the o rings=C2=A0
British frame and engine for the majority of the engine parts.=C2=A0

Sent from my iPhone

On Oct 22, 2025, at 7:23=E2=80=AFAM, mhmolson--- via Fot <[email-masked]=
t> wrote:

=EF=BB=BF

Good morning, I have an issue with transmission oil leaking out of the thre=
e o ring seals where the transmission selector shafts enter the top cover. =
This only happens during high rpms. This is an overdrive unit.
=20
Has anyone added additional venting to the top cover. I understand there is=
 possibly a small vent hole in the front however I have not looked at this =
yet. I am also going to build a TR4 motor this winter and am looking for di=
rection and contacts for pistons, liners, and rods. I am good at mechanical=
 logistics, and I have built two strokes, I have also been around engine bu=
ilders and understand, however this will be my first real build. Yes, I und=
erstand that certain things will be left to the pro=E2=80=99s
=20
Help appreciated
=20
Matt
 _______________________________________________
[email-masked]

[email-masked]

il.com

@yahoo.com

 =20
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<html><head></head><body><div class=3D"ydpd105ab6cyahoo-style-wrap" style=
=3D"font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px=
;"><div></div>
        <div dir=3D"ltr" data-setdir=3D"false">Great idea, Bob!</div><div d=
ir=3D"ltr" data-setdir=3D"false"><br></div><div dir=3D"ltr" data-setdir=3D"=
false">I used that boss to install a 3/8 NPT to AN6 adapter and run 3/8" ho=
se to a remote catch tank. Pretty mush zero tranny leakage with that setup.=
</div><div dir=3D"ltr" data-setdir=3D"false"><br></div><div dir=3D"ltr" dat=
a-setdir=3D"false">But if you crank your engine to big RPM's, the transmiss=
ion gets H-O-T and the pressure has to go somewhere.</div><div dir=3D"ltr" =
data-setdir=3D"false"><br></div><div dir=3D"ltr" data-setdir=3D"false">Rega=
rds,</div><div dir=3D"ltr" data-setdir=3D"false">sBob Lang</div><div><br></=
div>
       =20
        <div id=3D"ydpd105ab6cyahoo_quoted_1707799767" class=3D"ydpd105ab6c=
yahoo_quoted">
            <div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;">
               =20
                <div>
                    On Wednesday, October 22, 2025 at 11:20:04 AM EDT, Bob =
Kramer Gmail via Fot &lt;[email-masked]&gt; wrote:
                </div>
                <div><br></div>
                <div><br></div>
                <div><div id=3D"ydpd105ab6cyiv9447186494"><div>All great ad=
vice. Another easy approach is to add &nbsp;vent to the cover on the boss w=
here the TR2 dipstick once lives. These are sold online:<div><br clear=3D"n=
one"><div><img src=3D"cid:9HJp9Wxypr77PSAIYKGV" alt=3D"image" data-id=3D"17=
61154053812"></div><div><br clear=3D"none"></div><div><br clear=3D"none" id=
=3D"ydpd105ab6cyiv9447186494lineBreakAtBeginningOfSignature"><div dir=3D"lt=
r">You only get one chance at life, make it a TRIUMPH.</div><div dir=3D"ltr=
"><div id=3D"ydpd105ab6cyiv9447186494yqtfd04251" class=3D"ydpd105ab6cyiv944=
7186494yqt2959574166"><br clear=3D"none"><blockquote type=3D"cite">On Oct 2=
2, 2025, at 9:56=E2=80=AFAM, Tony Garmey via Fot &lt;[email-masked]&gt;=
 wrote:<br clear=3D"none"><br clear=3D"none"></blockquote></div></div><div =
id=3D"ydpd105ab6cyiv9447186494yqtfd38032" class=3D"ydpd105ab6cyiv9447186494=
yqt2959574166"><blockquote type=3D"cite"><div dir=3D"ltr">=EF=BB=BF

</div></blockquote></div></div></div></div><div id=3D"ydpd105ab6cyiv9447186=
494yqtfd72439" class=3D"ydpd105ab6cyiv9447186494yqt2959574166"><div>

The oem vent is a small hole in the tail shaft under the shift tower.
<div>If your sure that the o rings are leaking - go ahead and pop of the ge=
arbox top and =E2=80=A6</div>
<div>*Add a dash4 fitting for a vent&nbsp;</div>
<div>*drill and lock wire the set screws that loc the selector forks to the=
 rails</div>
<div>* tach weld the centre blade at the end of the rail .</div>
<div>* change the o rings&nbsp;</div>
<div><br clear=3D"none">
</div>
<div>British frame and engine for the majority of the engine parts.&nbsp;</=
div>
<div><br clear=3D"none">
</div>
<div><br clear=3D"none">
</div>
<div><br clear=3D"none" id=3D"ydpd105ab6cyiv9447186494lineBreakAtBeginningO=
fSignature">
<div dir=3D"ltr">Sent from my iPhone</div>
<div dir=3D"ltr"><br clear=3D"none">
<blockquote type=3D"cite">On Oct 22, 2025, at 7:23=E2=80=AFAM, mhmolson--- =
via Fot &lt;[email-masked]&gt; wrote:<br clear=3D"none">
<br clear=3D"none">
</blockquote>
</div>
<blockquote type=3D"cite">
<div dir=3D"ltr">=EF=BB=BF
</div></blockquote></div></div></div><div><div id=3D"ydpd105ab6cyiv94471864=
94yqtfd36577" class=3D"ydpd105ab6cyiv9447186494yqt2959574166"><div class=3D=
"ydpd105ab6cyiv9447186494WordSection1">
<p class=3D"ydpd105ab6cyiv9447186494MsoNormal"><span style=3D"font-size:11.=
0pt;">Good morning, I have an issue with transmission oil leaking out of th=
e three o ring seals where the transmission selector shafts enter the top c=
over. This only happens during high rpms. This is an overdrive
 unit.</span></p>=20
<p class=3D"ydpd105ab6cyiv9447186494MsoNormal"><span style=3D"font-size:11.=
0pt;">Has anyone added additional venting to the top cover. I understand th=
ere is possibly a small vent hole in the front however I have not looked at=
 this yet. I am also going to build a TR4 motor this winter and
 am looking for direction and contacts for pistons, liners, and rods. I am =
good at mechanical logistics, and I have built two strokes, I have also bee=
n around engine builders and understand, however this will be my first real=
 build. Yes, I understand that certain
 things will be left to the pro=E2=80=99s</span></p>=20
<p class=3D"ydpd105ab6cyiv9447186494MsoNormal"><span style=3D"font-size:11.=
0pt;">Help appreciated</span></p>=20
<p class=3D"ydpd105ab6cyiv9447186494MsoNormal"><span style=3D"font-size:11.=
0pt;">Matt</span></p>=20
</div>
<div>&lt;IMG_2832.jpg&gt;</div>
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ne">
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