[Fot] TR6 Trailing Arms

[Allen Washatko]

Robert,

After a little more checking, I agree with you that the casting didn't  
change.
The factory changed the following parts to correct the problem of rear  
end "squatting" under acceleration:

1. Added the "3 notch" trailing inner arm bracket
2. Added the "1 notch" outer trailing arm bracket
3. Stiffer coil springs
4. Rebound rubber assembly mounted on frame
5. Aluminum spacer for rear spring as a cure for rear wheel camber  
issues

Best,

Allen

On Feb 9, 2014, at 10:05 AM, Robert M. Lang wrote:

> Hi,
>
> Near as I can recall, the "fix" was the 3-notch trailing arm pivot  
> bracket. There _may_ have been a slightly different spring avaiable  
> for later cars, but cannot recall for sure. I've had 69, 72, 73 and  
> 74 TR6s and I don't recall any differences in the trailing arms. I'm  
> pretty sure the 69 springs were softer.  But the bracket is the only  
> hardware change that I recall.
>
> Turns out the foundry where the trailing arms were cast would mark  
> the dat of manufacture (month and year), so if you really wanted to   
> dig here, all you need to do is get your hands on a really early T/A  
> and a really late one and measure.
>
> But to be honest, I don't think the T/A casting changed over time.
>
> Regards,
> rml
> ---------------------------------------------------------------------------
> Bob Lang              Triumph TR6!!            |  This space for rent
> Former NER Solo Chair                          |
> Voice:617-253-7438                             |  Cell: 339-927-4489
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Allen & Jody Washatko
1971 TR6  - Number 6