Subject: Re: [TR] GT6 trans bearing noise on launch -

From: Q <[email-masked]>
Date: Tue, 21 Feb 2023 14:33:32 -0800

Interesting wear on the gear cluster end. I expect that it has worn 
through the (presumably) harden wear surface to the softer material 
underneath.  At a minimum I would fit a hardened shim to bring the 
surface level again.

Looks like odd surface marking on the inner solid bushing as well.  Is 
it just brass or is it oilite material?  They make a kit for the big TR 
gearbox so two bearings can be installed on each end of the gear 
cluster.  The problem would be to find a caged roller with a race that 
would fit (McMaster-Carr?).  You would need to turn the gear cluster to 
fit the outer diameter of the new bearing.  That is not an easy job 
either as the surface of the cluster is hardened to be a bearing race 
for the loose needle bearings.  Please note that if you are using loose 
bearings they come in packs of 50 but you only use 49 of them.

I would not use the chipped cluster.  Too much surface area is missing 
and the harden surface remaining may be detaching form the body.

There was a time when there were some counter shafts that were of 
inferior quality as well.  I don't know if that is still the  case but I 
certainly would not purchase parts from "The lowest bidder" regardless.

Your best bet would be to find a good replacement cluster but GT6 trans 
parts are few and far between.

Please note I am not a professional transmission mechanic, just lending 
my opinion based on personal Triumph experience over the years.

Edward Hamer

Petaluma CA

** [email-masked] **

Donate: http://www.team.net/donate.html
Archive: http://www.team.net/pipermail/triumphs  http://www.team.net/archive

Unsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/[email-masked]

---

From: aribert neumann <[email-masked]>
Date: Sat, 25 Feb 2023 13:57:40 -0500

--===============1904732772801719695==

--00000000000015eae005f58ad260

Edward:  Thank you for your response.   I've been a bit late in responding
- ice storm on Wednesday, we are scheduled to have power back on by
Monday.

You raised a number of valid points that I had not considered.   I was
really hoping that there might be a consensus response that the chipped
layshaft would probably work.

From: Q <[email-masked]>
> Subject: Re: [TR] GT6 trans bearing noise on launch -
> _______________________________________________
>
> Triumphs mailing list
> [email-masked]
> http://autox.team.net/mailman/listinfo/triumphs
>

--00000000000015eae005f58ad260
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Edward:=C2=A0 Thank you for your response.=C2=A0 =C2=
=A0I&#39;ve been a bit late in responding - ice storm on Wednesday, we are =
scheduled to have power back on by Monday.=C2=A0=C2=A0</div><div><br></div>=
<div>You raised a number of valid points that I had=C2=A0not considered.=C2=
=A0=C2=A0=C2=A0I was really hoping that there might be a consensus response=
 that the chipped layshaft would probably work.=C2=A0=C2=A0</div><div><br><=
/div><div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"=
margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-lef=
t:1ex">From:=C2=A0Q &lt;<a href=3D"mailto:[email-masked]" target=3D"_bl=
ank">[email-masked]</a>&gt;=C2=A0<br>Subject:=C2=A0Re: [TR] GT6 trans b=
earing noise on launch -<br>Interesting wear on the gear cluster end. I exp=
ect that it has worn <br>
through the (presumably) harden wear surface to the softer material <br>
underneath.=C2=A0 At a minimum I would fit a hardened shim to bring the <br=
surface level again.<br>
<br>
Looks like odd surface marking on the inner solid bushing as well.=C2=A0 Is=
 <br>
it just brass or is it oilite material?=C2=A0 They make a kit for the big T=
R <br>
gearbox so two bearings can be installed on each end of the gear <br>
cluster.=C2=A0 The problem would be to find a caged roller with a race that=
 <br>
would fit (McMaster-Carr?).=C2=A0 You would need to turn the gear cluster t=
o <br>
fit the outer diameter of the new bearing.=C2=A0 That is not an easy job <b=
r>
either as the surface of the cluster is hardened to be a bearing race <br>
for the loose needle bearings.=C2=A0 Please note that if you are using loos=
e <br>
bearings they come in packs of 50 but you only use 49 of them.<br>
<br>
I would not use the chipped cluster.=C2=A0 Too much surface area is missing=
 <br>
and the harden surface remaining may be detaching form the body.<br>
<br>
There was a time when there were some counter shafts that were of <br>
inferior quality as well.=C2=A0 I don&#39;t know if that is still the=C2=A0=
 case but I <br>
certainly would not purchase parts from &quot;The lowest bidder&quot; regar=
dless.<br>
<br>
Your best bet would be to find a good replacement cluster but GT6 trans <br=
parts are few and far between.<br>
<br>
Please note I am not a professional transmission mechanic, just lending <br=
my opinion based on personal Triumph experience over the years.<br>
<br>
<br>
Edward Hamer<br>
<br>
Petaluma CA<br>
<br>
<br>
_______________________________________________<br>
<br>
Triumphs mailing list<br>
<a href=3D"mailto:[email-masked]" target=3D"_blank">Triumphs@autox=
.team.net</a><br>
<a href=3D"http://autox.team.net/mailman/listinfo/triumphs" rel=3D"noreferr=
er" target=3D"_blank">http://autox.team.net/mailman/listinfo/triumphs</a><b=
r>
</blockquote></div></div>

--00000000000015eae005f58ad260--

--===============1904732772801719695==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

--===============1904732772801719695==--