Re: [Amc-list] Early American Front Suspension

[Tom Jennings <tomj@xxxxxxx>]

On Tuesday 11 September 2007 15:28:06 Thomas Garner wrote:
> Found this on ebay and knew that you guys where talking about suspension
> stuff.
> http://cgi.ebay.com/ebaymotors/RAMBLER-64-69-PROTHANE-SUSPENSION-KIT-TRUNIO
>N-AMC-BN_W0QQitemZ330163715450QQihZ014QQcategoryZ33583QQssPageNameZWDVWQQrdZ
>1QQcmdZViewItem


Wow, popular item!


>
>
> ------------------------------
>
> Message: 4
> Date: Tue, 11 Sep 2007 12:28:53 -0700
> From: Tom Jennings <tomj@xxxxxxx>
> Subject: Re: [Amc-list] early american front suspension
> To: "AMC/Rambler owners, drivers and fans." <amc-list@xxxxxxxxxxxx>
> Message-ID: <200709111228.54026.tomj@xxxxxxx>
> Content-Type: text/plain;  charset="iso-8859-1"
>
> On Tuesday 11 September 2007 06:51:52 Frank Swygert wrote:
> > Hmm... never thought about the braking forces much! I had 7.7" tires
> > (195 mm) and 79 Spirit disc brakes at the time one of mine worked loose.
> > One didn't feel quite as tight as the others in the arm, but didn't turn
> > or anything. I did stake it at a visible spot with a punch so I could
> > easily see if it was turning. After a few months I stopped looking much
> > since it never moved. Checked it weekly for 2-3 months though! Two years
> > later things changed somehow. It was a rear cap, so the braking forces
> > make a bit of sense -- load is taken off the lower rear when braking
> > hard, I'd think.
>
> I think what might happen at the lower trunnion is that the tip of the
> A-arm gets twisted during hard braking; the brakes try to rotate the
> steering knuckle, on the drivers side it wants to go counter-clockwise. The
> knuckle is a big lever with the fulcrum near the upper A-arm, and the load
> is the lower rear trunnion cap -- it's pushed back and upward, transmitting
> energy to the arms as twisting. (The trunnion pulls on the front trunnion
> cap.)
>
> The shock spacer is the ONLY thing keeping the lower arm rigid! And I was
> gonna make a reduced-diameter spacer to accomodate a modern shock, but I'm
> not gonna do that any more -- in fact I think I will make a LARGER!
> diameter spacer as a strength member, and put the shock more inwards
> (there's a pair of extra holes in the lower arms about 3" further back).
> I'd rather have poorer shock absorbtion/ride than busted trunnions!
>
>
>
>
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