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Jack the late laygears use a pressed-in "shell" bearing.They can be fitted=
to the early circlip gears and aren't an issue but the pressed-only have a=
tendency to walk out and lathe (used as a verb) into the thrust washer so =
it can't be removed, so nor can the gear.
The wear issue is exacerbated by all of the metal crumbs generated above th=
e area by 1st/reverse gear graunching.
Glen
=20
=20
-----Original Message-----
From: Jack Wheeler via Fot <fot@autox.team.net>
To: Glenn Franco <brakey6666@gmail.com>
Cc: Triumph 'Friends of Triumph <fot@autox.team.net>
Sent: Sun, Aug 11, 2019 8:47 am
Subject: Re: [Fot] Triumph 4 speed O/D's and Layshaft bearing failures.
I have rebuilt many TR-3B through TR-6 gear boxes, both with and without o=
verdrive.=C2=A0 The failure mode you mention is common, where the lay gear =
grinds into the rear thrust washer, and sometimes into the housing.=C2=A0 H=
owever, I have never had trouble removing the lay gear.=C2=A0 Once I remove=
the thrust washer, the lay gear lifts right out.=C2=A0 Am I missing someth=
ing?=C2=A0 Are you working on a Spitfire or GT-6 gearbox?
Once again, I pull the rear thrust washer out, generally with the transmiss=
ion oriented with the bell housing down.=C2=A0 Then, with the gearbox orien=
ted in the upright position, I lift up the end of the lay gear where I have=
just removed the thrust washer.=C2=A0 Once it clears the boss at the rear =
of the housing, the lay gear comes right out.
Not sure this is any help, but that's my experience.
Jack Wheeler
On Saturday, August 10, 2019, 3:52:18 PM EDT, Glenn Franco via Fot <fot=
@autox.team.net> wrote: =20
=20
Just finished another A Type Overdrive rebuild this afternoon. Next one I =
do I'm going to insist that the owner bring a spare 4 speed for parts or ma=
ybe 2.I very rarely find an overdrive transmission that the layshaft bearin=
g next to 1st that hasn't walked and tried to escape the case through the t=
hrust bearing. I have tried in vane to remove the laygear=C2=A0with one tha=
t ground its way into the thrust bearing and sometimes the case. I sometime=
s get the laygear out but in most cases the trans case with the laygear is =
sent to scrap.Does anyone have a solution, trick, special tool, to ease the=
laygear out. The normal way is to remove the small thust bearing with a ma=
gnet so you can tilt the laygear enough to get it out. I have even once res=
orted to=C2=A0a " Slugger Slide Hammer" and chain wrapped around the laygea=
r to get it out. Didn't end well however.I did read somewhere that someone =
is using a tapered roller bearing on that end which would make more sense t=
han the original design.Please adviseThanks in advanceGlennTR6, TR250, Miat=
a, 47 MG TC For Sale, 73 BMW E10 2002 being restored_______________________=
________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
yahoo.com
_______________________________________________
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m
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<div style=3D"color:black;font: 10pt Arial, Helvetica, sans-serif;">
<div> <font size=3D"2">Jack the late laygears use a pressed-in "shell" bear=
ing.</font></div>
<div><font size=3D"2">They can be fitted to the early circlip gears and are=
n't an issue but the pressed-only have a tendency to walk out and lathe (us=
ed as a verb) into the thrust washer so it can't be removed, so nor can the=
gear.</font></div>
<div><font size=3D"2"><br>
</font></div>
<div><font size=3D"2">The wear issue is exacerbated by all of the metal cru=
mbs generated above the area by 1st/reverse gear graunching.</font></div>
<div><font size=3D"2"><br>
</font></div>
<div><font size=3D"2">Glen</font><br>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black">-----=
Original Message-----<br>
From: Jack Wheeler via Fot <fot@autox.team.net><br>
To: Glenn Franco <brakey6666@gmail.com><br>
Cc: Triumph 'Friends of Triumph <fot@autox.team.net><br>
Sent: Sun, Aug 11, 2019 8:47 am<br>
Subject: Re: [Fot] Triumph 4 speed O/D's and Layshaft bearing failures.<br>
<br>
<div id=3D"yiv5768499517">
<div>
<div class=3D"yiv5768499517ydp714e40ayahoo-style-wrap" style=3D"font-family=
:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;">
<div></div>
=20
<div dir=3D"ltr">I have rebuilt many TR-3B through TR-6 gear boxes, both wi=
th and without overdrive. The failure mode you mention is common, whe=
re the lay gear grinds into the rear thrust washer, and sometimes into the =
housing. However, I have never had trouble removing the lay gear.&nbs=
p; Once I remove the thrust washer, the lay gear lifts right out. Am =
I missing something? Are you working on a Spitfire or GT-6 gearbox?</=
div>
<div dir=3D"ltr"><br clear=3D"none"></div>
<div dir=3D"ltr">Once again, I pull the rear thrust washer out, generally w=
ith the transmission oriented with the bell housing down. Then, with =
the gearbox oriented in the upright position, I lift up the end of the lay =
gear where I have just removed the thrust washer. Once it clears the =
boss at the rear of the housing, the lay gear comes right out.</div>
<div dir=3D"ltr"><br clear=3D"none"></div>
<div dir=3D"ltr">Not sure this is any help, but that's my experience.</div>
<div dir=3D"ltr"><br clear=3D"none"></div>
<div dir=3D"ltr">Jack Wheeler<br clear=3D"none"></div>
<div><br clear=3D"none"></div>
=20
</div>
<div class=3D"yiv5768499517ydp4665f6fbyahoo_quoted" id=3D"yiv5768499517ydp4=
665f6fbyahoo_quoted_5928348454">
=20
<div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;fo=
nt-size:13px;color:#26282a;">
=20
=20
<div class=3D"yiv5768499517yqt0211589459" id=3D"yiv5768499517yqt11073">
<div>
On Saturday, August 10, 2019, 3:52:18 PM EDT, Glenn Fra=
nco via Fot <fot@autox.team.net> wrote:
</div>
=20
<div><br clear=3D"none"></div>
=20
<div><br clear=3D"none"></div>
=20
<div>
<div id=3D"yiv5768499517ydp4665f6fbyiv5718343864">
<div dir=3D"ltr">
<div>Just finished another A Type Overdrive rebuild this afternoon. Next on=
e I do I'm going to insist that the owner bring a spare 4 speed for parts o=
r maybe 2.</div>
<div>I very rarely find an overdrive transmission that the layshaft bearing=
next to 1st that hasn't walked and tried to escape the case through the th=
rust bearing. I have tried in vane to remove the laygear with one that=
ground its way into the thrust bearing and sometimes the case. I sometimes=
get the laygear out but in most cases the trans case with the laygear is s=
ent to scrap.</div>
<div>Does anyone have a solution, trick, special tool, to ease the laygear =
out. The normal way is to remove the small thust bearing with a magnet so y=
ou can tilt the laygear enough to get it out. I have even once resorted to&=
nbsp;a " Slugger Slide Hammer" and chain wrapped around the laygear to get =
it out. Didn't end well however.</div>
<div>I did read somewhere that someone is using a tapered roller bearing on=
that end which would make more sense than the original design.</div>
<div>Please advise</div>
<div>Thanks in advance</div>
<div>Glenn</div>
<div>TR6, TR250, Miata, 47 MG TC For Sale, 73 BMW E10 2002 being restored</=
div>
</div>
</div>
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_______________________________________________
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