[DML] Pearce Design Correction
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[DML] Pearce Design Correction


Your posting is incorrect regarding the design and operation of the  
Pearce Design trailing arm mounting system.

You state that the Pearce Design doesn't have any compliance (rubber)  
so it transmits vibration into the frame.  However, had you ever  
driven a DeLorean with the new trailing arms or examined one, you  
would be aware that rubber does isolate the Heim joint by capturing  
each end of a Rear Control Arm Pin.  This is not apparent without  
disassembling the joint.  A picture is worth a thousand words, so  
please look at a drawing of the system:


Just to be clear, I don't THINK this design works, I KNOW it does.   
The prototype frame and trailing arm system has over 120,000 miles on  
it and several more production frames are accumulating miles every day.

If anyone has specific questions about this system or the PermaFrame  
please feel free to contact me, understand the design or issue in  
question, and then post accurate information to the DML.

Bryan Pearce

On Mar 15, 2006, at 8:56 PM, David Teitelbaum wrote:

> I am familiar with the Pierce design. It requires a redesigned
> trailing arm. I was asking out loud for a retrofit that could make use
> (if possible) of the origional trailing arm while being able to use a
> Heim Joint. The Pierce design doesn't not have any compliance (rubber)
> so it  transmits vibration into the frame. The ideal joint would be
> flexible in 2 planes of motion AND isolate the frame from road
> vibration. It should also have a way to fail without letting the wheel
> move too far out-of-place and not be subject to a single point failure
> (1 bolt). It also has to be adjustable so you can set the thrust angle
> of the rear wheels. A tall order which is why we have what we have! I
> agree we can live with it but IMHO it is an item that should be
> regularly inspected and if properly taken care of we can live with it
> as it is.
> David Teitelbaum
> vin 10757

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