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I too had frame cracks from the tube shock brackets I installed. I had a =
local welder come out and weld up the cracks and add differential =
reinforcement brackets. I had done minor welding, but didn't have a welder=
or adequate power in my apartment garage. It was well worth paying =
someone to weld in an overhead location. I was nearby with a good fire =
extinguisher and a garden hose as I to was concerned about the welding near=
the gas can.
To prevent the problem in the future I added diagonal braces down to the =
frame behind the shock brackets and a cross brace between the two shock =
brackets.
For anyone installing the tube shock conversion brackets that just bolt to =
with the original lever shock bolts, test the range of motion without the =
spring installed. The trailing arm goes through an angular motion that =
puts a sideways force on the frame cross member that it wasn't designed for=
. =20
I remade the brackets to move the top of the shock about 1.5 inches for a =
better range of motion. If I were to go back in time, I would just have =
the heavy duty rebuild of the original lever shocks.
Brian=20
-----Original Message-----
From: Stan Foster <stan@redtr6.com>
Sent: Oct 8, 2025 2:40 PM
To: Tim Gaines <mtgaines@presby.edu>, Triumphs <triumphs@autox.team.net>
Subject: Re: [TR] TR6 rear shock mount break
I had those brackets and the stress caused the cross ember to be torn off =
the frame. I fitted the cross member from RATCO and switched back to lever =
arm schocks.
=20
Stan
=20
From: Triumphs <triumphs-bounces@autox.team.net> On Behalf Of Tim Gaines
Sent: Wednesday, October 8, 2025 4:37 PM
To: Triumphs <triumphs@autox.team.net>
Subject: [TR] TR6 rear shock mount break
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'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.
=20
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'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?
=20
=20
=20
=20
=20
=20
=20
(https://www.avast.com/sig-email?utm_medium=3Demail&utm_source=3Dlink&=
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<div style=3D"color:rgb(0, 0, 0);font-family:arial,sans-serif;font-size:12p=
t"><p style=3D"margin: 0.1rem 0; line-height: 1.0;">I too had frame cracks =
from the tube shock brackets I installed. I had a local welder come =
out and weld up the cracks and add differential reinforcement brackets.=
I had done minor welding, but didn't have a welder or adequate power=
in my apartment garage. It was well worth paying someone to weld in =
an overhead location. I was nearby with a good fire extinguisher and =
a garden hose as I to was concerned about the welding near the gas can.=
</p>
<p style=3D"margin: 0.1rem 0; line-height: 1.0;"> </p>
<p style=3D"margin: 0.1rem 0; line-height: 1.0;">To prevent the problem in =
the future I added diagonal braces down to the frame behind the shock =
brackets and a cross brace between the two shock brackets.</p>
<p style=3D"margin: 0.1rem 0; line-height: 1.0;"> </p>
<p style=3D"margin: 0.1rem 0; line-height: 1.0;">For anyone installing the =
tube shock conversion brackets that just bolt to with the original lever =
shock bolts, test the range of motion without the spring installed. =
The trailing arm goes through an angular motion that puts a sideways force =
on the frame cross member that it wasn't designed for. </p>
<p style=3D"margin: 0.1rem 0; line-height: 1.0;"> </p>
<p style=3D"margin: 0.1rem 0; line-height: 1.0;">I remade the brackets to =
move the top of the shock about 1.5 inches for a better range of motion.=
If I were to go back in time, I would just have the heavy duty =
rebuild of the original lever shocks.</p>
<p style=3D"margin: 0.1rem 0; line-height: 1.0;"> </p>
<p style=3D"margin: 0.1rem 0; line-height: 1.0;">Brian </p>
<p style=3D"margin: 0.1rem 0; line-height: 1.0;"> </p>
</div>
<div class=3D"elnk-inline-message-container" style=3D"border-left: 1px =
solid #aaa; box-sizing: border-box; padding: 10px 0 10px 15px; margin: =
0;">
<p>-----Original Message-----<br>From: Stan Foster <stan@redtr6.=
com><br>Sent: Oct 8, 2025 2:40 PM<br>To: Tim Gaines <mtgaines@presby.=
edu>, Triumphs <triumphs@autox.team.net><br>Subject: Re: [TR] TR6 =
rear shock mount break</p>
<p style=3D"margin: 0.1rem 0; line-height: 1.0;"> </p>
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size: 11.0pt;">I had those =
brackets and the stress caused the cross ember to be torn off the frame. I =
fitted the cross member from RATCO and switched back to lever arm schocks.=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11.=
0pt;"> </span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11.0pt;">Stan</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11.=
0pt;"> </span></p>
<div>
<div style=3D"border: none; border-top: solid #E1E1E1 1.0pt; padding: 3.0pt=
0in 0in 0in;">
<p class=3D"MsoNormal"><strong><span style=3D"font-size: 11.0pt; =
font-family: 'Calibri',sans-serif;">From:</span></strong><span =
style=3D"font-size: 11.0pt; font-family: 'Calibri',sans-serif;"> Triumphs =
<triumphs-bounces@autox.team.net> <strong>On Behalf Of </strong>Tim =
Gaines<br><strong>Sent:</strong> Wednesday, October 8, 2025 4:37 =
PM<br><strong>To:</strong> Triumphs <triumphs@autox.team.=
net><br><strong>Subject:</strong> [TR] TR6 rear shock mount =
break</span></p>
</div>
</div>
<p class=3D"MsoNormal"> </p>
<p class=3D"MsoNormal"><span style=3D"font-family: 'Segoe UI',=
sans-serif;">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'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.</span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family: 'Segoe UI',=
sans-serif;"> </span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family: 'Segoe UI',=
sans-serif;">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'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?</span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family: 'Segoe UI',=
sans-serif;"> </span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family: 'Segoe UI',=
sans-serif;"> </span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family: 'Segoe UI',=
sans-serif;"> </span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family: 'Segoe UI',=
sans-serif;"> </span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family: 'Segoe UI',=
sans-serif;"> </span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family: 'Segoe UI',=
sans-serif;"> </span></p>
</div>
</div>
</div>
</div>
<div id=3D"DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2">
<p class=3D"MsoNormal"><span style=3D"font-family: 'Segoe UI',=
sans-serif;"> </span></p>
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<tr>
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<p class=3D"MsoNormal" style=3D"line-height: 13.5pt;"><span =
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#41424e;">Virus-free.<a href=3D"https://www.avast.com/sig-email?=
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0;"> </p>
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