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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 <fot@autox.team.net> wrote:
> =20
> =20
> The oem vent is a small hole in the tail shaft under the shift tower.
> If your sure that the o rings are leaking - go ahead and pop of the gearb=
ox 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 ra=
ils
> * 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
>=20
> > On Oct 22, 2025, at 7:23=E2=80=AFAM, mhmolson--- via Fot <fot@autox.tea=
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
> >=20
> > Help appreciated
> >=20
> > Matt
> >=20
> > <IMG_2832.jpg>
> > _______________________________________________
> > fot@autox.team.net
> >=20
> > http://www.fot-racing.com
> >=20
> > Donate: http://www.team.net/donate.html
> > Archive: http://autox.team.net/archive http://www.team.net/pipermail/fo=
t
> > Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/vintagecl=
assicsus@outlook.com
> >=20
> >=20
> >=20
> _______________________________________________
> fot@autox.team.net
>=20
> http://www.fot-racing.com
>=20
> Donate: http://www.team.net/donate.html
> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/dlhogye@com=
cast.net
>=20
>=20
>=20
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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. </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. 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. I have seen this. 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. Be aware that just about every threaded bolt hole i=
n the case goes through the case. Sealant should be used, or leaks wi=
ll be plenty. The 4 input shaft bearing carrier bolt holes also go th=
rough the case. They will leak without sealant. </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. A number of bolt holes go through the block. =
; 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 engin=
e, so I use crush washers under the bolts there. </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. </span>
</div>=20
<div class=3D"default-style" style=3D"font-size: 12pt; font-family: helve=
tica,arial,sans-serif; color: #333333;">
</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;">
</div>=20
<div class=3D"default-style" style=3D"font-size: 12pt; font-family: helve=
tica,arial,sans-serif; color: #333333;">
</div>=20
<blockquote type=3D"cite">=20
<div>
On 10/22/2025 7:31 AM PDT Tony Garmey via Fot <fot@autox.team.net>=
; wrote:
</div>=20
<div>
</div>=20
<div>
</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
</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
</div>=20
<div>
</div>=20
<div>
British frame and engine for the majority of the engine parts.
</div>=20
<div>
</div>=20
<div>
</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 <fot@auto=
x.team.net> 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>
<IMG_2832.jpg>
</div> _______________________________________________
<br>fot@autox.team.net
<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=
tageclassicsus@outlook.com
<br>
<br>
<br>
</div>=20
</blockquote>=20
</div> _______________________________________________
<br>fot@autox.team.net
<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=
e@comcast.net
<br>
<br>
<br>
</blockquote>
</body>
</html>
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
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