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Re: [TR] TR6 rear shock mount break

To: David P <frogeye@porterscustom.com>
Subject: Re: [TR] TR6 rear shock mount break
From: Greg Lemon <grglmn@gmail.com>
Date: Thu, 9 Oct 2025 20:15:08 -0500
Cc: Triumph List <triumphs@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: triumphs@autox.team.net
References: <emd5c8a763-1113-4af3-8e7c-15365916cecd@0baed868.com> <f585a5a8-32b8-42d4-9c74-c9537361d24c@app.fastmail.com> <490692460.1151951.1760041773098@mail.yahoo.com> <8c286b86-be3f-4937-a2cf-6e4aa1dfc6f8@porterscustom.com>
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I have the tube shock conversion, I have been autocrossing my Triumph since
I finished restoring it about 15 years ago.  So far so good, I have a lift
so can check things out pretty easily.

I had a good set of lever shocks, but sold them on eBay several years ago,
thinking I would never go back.   I put a couple extra washers on the
bumper stop (in the can't hurt might help department) as I understand it
may be at the limit of travel for the shock that the mount gets stressed.

Greg Lemon

On Thu, Oct 9, 2025, 7:29=E2=80=AFPM David P <frogeye@porterscustom.com> wr=
ote:

> Dang, now I have to check mine for cracks..
> On 10/9/2025 2:29 PM, brserv@aol.com wrote:
>
> I just had my TR3A rear shocks rebuilt by Worldwide Auto Parts of Madison=
,
> Wisconsin, and they did a great job on the shocks. You can specify if you
> want the original dampening, or several levels of higher dampening. Plus,
> they always machine the opening for the shock lever shaft, and then insta=
ll
> a lip seal that will keep the shocks from leaking. I sent them my shocks
> and it took two weeks to get them back. I think that I paid $130 per shoc=
k.
>
> AlexL
>
>
>
> In a message dated 10/9/2025 2:30:42 PM Eastern Daylight Time,
> gene@garrison-grafixx.com writes:
>
>
> Ouch!
>
> Tim, I don't have an answer for your welding question, but I want to
> recommend what I (eventually) did.
>
> Back in the 80s, I had a problem with my 6 that I tracked down to the rea=
r
> shocks not "shocking".  I put on a similar adapter, and was fortunate to
> never see any cracks.  But it always worried me.  Then, a few years back,=
 I
> started hearing about an outfit that would rebuild the lever shocks (Appl=
e
> Hydraulics?  Could look it up when I get home.)  And I figured I'd give i=
t
> a try.  And I'm very, very happy with the results.
>
> Just a thought for when you get to that point.
>
> - GeneG
>
> On Wed, Oct 8, 2025, at 3:37 PM, Tim Gaines wrote:
>
> I have been hearing a slapping sound either under or behind me in the 197=
4
> TR6 when I encounter even slightly rough pavement, so today I decided to
> sort it out. I thought I had found the problem quickly when I saw that th=
e
> spare tire securing hook bolt had come loose, but no such luck. When I
> finally gave up on simple fixes and jacked up the left rear end and remov=
ed
> the tire, I saw that the cross member had cracked near where the after
> market shock mount adaptor bolts on. I did a quick check with the Moss
> parts catalog and that cross member is not available with them. So, I'm
> wondering if this shock mount replacement for the old lever shock (I
> installed a couple of decades ago) was a bad idea and put too much pressu=
re
> on that frame member. It occurs to me that there may be some folks out
> there who have gone through this and can tell me just how a fix should be
> attempted.
>
> That crack shown in the photo seems to be only on the back side of the
> cross member. I have learned some welding skills in the last few years, a=
nd
> I have a mig welder, but I have never done anything under a car. I really
> don't like the proximity of the gas tank either. I am thinking that my
> local pro welder would be the guy to call on, but is this really somethin=
g
> that can be fixed that way?
>
>
>
>
>
>
>
>
> <https://www.avast.com/sig-email?utm_medium=3Demail&utm_source=3Dlink&utm=
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>
>
> *Attachments:*
>
>    - TR6 broken support.JPG
>
>
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e@porterscustom.com
>
> --
> DBA Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM. 87107 <https=
://www.google.com/maps/search/2909+Arno+St.+NE+Albuquerque,+NM.+87107?entry=
=3Dgmail&source=3Dg> ph 505-352-1378  My World go here: WWW.PORTERBIKES.COM=
/
>
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>

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<div dir=3D"auto">I have the tube shock conversion, I have been autocrossin=
g my Triumph since I finished restoring it about 15 years ago.=C2=A0 So far=
 so good, I have a lift so can check things out pretty easily.<div dir=3D"a=
uto"><br></div><div dir=3D"auto">I had a good set of lever shocks, but sold=
 them on eBay several years ago, thinking I would never go back.=C2=A0 =C2=
=A0I put a couple extra washers on the bumper stop (in the can&#39;t hurt m=
ight help department) as I understand it may be at the limit of travel for =
the shock that the mount gets stressed.</div><div dir=3D"auto"><br></div><d=
iv dir=3D"auto">Greg Lemon</div></div><br><div class=3D"gmail_quote gmail_q=
uote_container"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Oct 9, 2025, =
7:29=E2=80=AFPM David P &lt;<a href=3D"mailto:frogeye@porterscustom.com";>fr=
ogeye@porterscustom.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_=
quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1=
ex"><u></u>

 =20
   =20
 =20
  <div>
    <p>Dang, now I have to check mine for cracks..</p>
    <div>On 10/9/2025 2:29 PM, <a href=3D"mailto:brserv@aol.com"; target=3D"=
_blank" rel=3D"noreferrer">brserv@aol.com</a>
      wrote:<br>
    </div>
    <blockquote type=3D"cite">
     =20
      <div>
        <div style=3D"font-family:arial,helvetica,sans-serif;font-size:10pt=
;color:rgb(0,0,0)"><span style=3D"color:rgb(0,0,0);font-style:normal;font-w=
eight:normal">I
            just had my TR3A rear shocks rebuilt by Worldwide Auto Parts
            of Madison, Wisconsin, and they did a great job on the
            shocks. You can specify if you want the original dampening,
            or several levels of higher dampening. Plus, they always
            machine the opening for the shock lever shaft, and then
            install a lip seal that will keep the shocks from leaking. I
            sent them my shocks and it took two weeks to get them back.
            I think that I paid $130 per shock.=C2=A0<br>
          </span></div>
        <div style=3D"font-family:arial,helvetica,sans-serif;font-size:10pt=
;color:rgb(0,0,0)">=C2=A0</div>
        <div style=3D"font-family:arial,helvetica,sans-serif;font-size:10pt=
;color:rgb(0,0,0)"><span style=3D"color:rgb(0,0,0);font-style:normal;font-w=
eight:normal">AlexL</span></div>
        <div style=3D"font-family:arial,helvetica,sans-serif;font-size:10pt=
;color:rgb(0,0,0)">=C2=A0</div>
        <div style=3D"font-family:arial,helvetica,sans-serif;font-size:10pt=
;color:rgb(0,0,0)">=C2=A0</div>
        <br>
        In a message dated 10/9/2025 2:30:42 PM Eastern Daylight Time,
        <a href=3D"mailto:gene@garrison-grafixx.com"; target=3D"_blank" rel=
=3D"noreferrer">gene@garrison-grafixx.com</a> writes:
        <div>=C2=A0</div>
        <div>
          <blockquote style=3D"padding-left:5px;margin-left:5px;border-left=
:blue 2px solid">
            <div id=3D"m_796308010081605463yiv4969733073">
              <div>
                <div>Ouch!</div>
                <div>=C2=A0</div>
                <div>Tim, I don&#39;t have an answer for your welding
                  question, but I want to recommend what I (eventually)
                  did.</div>
                <div>=C2=A0</div>
                <div>Back in the 80s, I had a problem with my 6 that I
                  tracked down to the rear shocks not &quot;shocking&quot;.=
=C2=A0 I put
                  on a similar adapter, and was fortunate to never see
                  any cracks.=C2=A0 But it always worried me.=C2=A0 Then, a=
 few
                  years back, I started hearing about an outfit that
                  would rebuild the lever shocks (Apple Hydraulics?=C2=A0
                  Could look it up when I get home.)=C2=A0 And I figured I&=
#39;d
                  give it a try.=C2=A0 And I&#39;m very, very happy with th=
e
                  results.</div>
                <div>=C2=A0</div>
                <div>Just a thought for when you get to that point.</div>
                <div>=C2=A0</div>
                <div>- GeneG</div>
                <div>=C2=A0</div>
                <div id=3D"m_796308010081605463yiv4969733073yqtfd14763">
                  <div>On Wed, Oct 8, 2025, at 3:37 PM, Tim Gaines
                    wrote:</div>
                  <blockquote id=3D"m_796308010081605463yiv4969733073qt">
                    <div>I have been hearing a slapping sound either
                      under or behind me in the 1974 TR6 when I
                      encounter even slightly rough pavement, so today I
                      decided to sort it out. I thought I had found the
                      problem quickly when I saw that the spare tire
                      securing hook bolt had come loose, but no such
                      luck. When I finally gave up on simple fixes and
                      jacked up the left rear end and removed the tire,
                      I saw that the cross member had cracked near where
                      the after market shock mount adaptor bolts on. I
                      did a quick check with the Moss parts catalog and
                      that cross member is not available with them. So,
                      I&#39;m wondering if this shock mount replacement for
                      the old lever shock (I installed a couple of
                      decades ago) was a bad idea and put too much
                      pressure on that frame member. It occurs to me
                      that there may be some folks out there who have
                      gone through this and can tell me just how a fix
                      should be attempted.</div>
                    <div>=C2=A0</div>
                    <div>
                      <div>That crack shown in the photo seems to be
                        only on the back side of the cross member. I
                        have learned some welding skills in the last few
                        years, and I have a mig welder, but I have never
                        done anything under a car. I really don&#39;t like
                        the proximity of the gas tank either. I am
                        thinking that my local pro welder would be the
                        guy to call on, but is this really something
                        that can be fixed that way?</div>
                      <div>=C2=A0</div>
                      <div>
                        <div>=C2=A0</div>
                        <div>=C2=A0</div>
                        <div>
                          <div>=C2=A0</div>
                          <div>=C2=A0</div>
                          <div>=C2=A0</div>
                        </div>
                      </div>
                    </div>
                    <div id=3D"m_796308010081605463yiv4969733073qt-DAB4FAD8=
-2DD7-40BB-A1B8-4E2AA1F9FDF2">
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                    <div><strong>Attachments:</strong></div>
                    <ul>
                      <li>TR6 broken support.JPG</li>
                    </ul>
                  </blockquote>
                  <div>=C2=A0</div>
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    </blockquote>
    <pre cols=3D"72">--=20
DBA Porter Custom Bicycles <a href=3D"https://www.google.com/maps/search/29=
09+Arno+St.+NE+Albuquerque,+NM.+87107?entry=3Dgmail&amp;source=3Dg">2909 Ar=
no St. NE Albuquerque, NM. 87107</a> ph 505-352-1378  My World go here: <a =
href=3D"http://WWW.PORTERBIKES.COM/"; target=3D"_blank" rel=3D"noreferrer">W=
WW.PORTERBIKES.COM/</a></pre>
  </div>

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