[TR] TR6 rear shock mount break

[Tim Gaines]

Thanks Brian. I think I will try to go this route. I don't suppose you 
have any photos of your setup do you?

Tim

------ Original Message ------
>From "Brian Kemp" <bk13 at earthlink.net>
To "Tim Gaines" <mtgaines at presby.edu>; "Triumphs" 
<triumphs at autox.team.net>
Date 10/8/2025 6:05:09 PM
Subject Re: [TR] TR6 rear shock mount break

>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.
>
>
>
>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
>
>
>
>-----Original Message-----
>From: Stan Foster <stan at redtr6.com>
>Sent: Oct 8, 2025 2:40 PM
>To: Tim Gaines <mtgaines at presby.edu>, Triumphs 
><triumphs at 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.
>
>
>
>Stan
>
>
>
>From: Triumphs <triumphs-bounces at autox.team.net> On Behalf Of Tim 
>Gaines
>Sent: Wednesday, October 8, 2025 4:37 PM
>To: Triumphs <triumphs at 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.
>
>
>
>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?
>
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