Think a minute there Luke...
where is the spring mounted that is supporting
the weight of the frame and body tub?
It's mounted ON TOP the diff.
So in essence... the diff IS caring
(actually suspending) the bulk of the rear end
chassis and tub weight.
----- Original Message -----
From: "Luke Lewis" <lukage@home.com>
To: "Spitfire List" <spitfires@autox.team.net>; "Carter Shore"
<clshore@yahoo.com>
Sent: Wednesday, February 07, 2001 1:01 AM
Subject: Re: Oiling trunnions + jacking up
I'm pretty sure the diff carries no weight at all ... It's mounted to the
chassis...
One reason for the independent suspension was to minimize unsprung weight.
The rear leaf spring carries the weight indepently of the differential.
Luke
----- Original Message -----
From: "Carter Shore" <clshore@yahoo.com>
To: "L&B Lubbers" <lubbers@sympatico.ca>; "John Hobson"
<goalie_john@yahoo.co.uk>
Cc: "spitfires list" <spitfires@autox.team.net>
Sent: Tuesday, February 06, 2001 11:43 PM
Subject: Re: Oiling trunnions + jacking up
>
> I've used the diff to jack the car when it was
> convenient.
> After all, the diff already carries the entire weight
> of the car ( a whopping 800 lbs! ). Wheel to hub to
> trunnion to upright to spring to diff to bushings to
> frame.
> On diffs with a drain plug, the plug fits nicely into
> the saddle of my hydaulic jack, preventing slippage.
> I usually try to use a short piece of 2x4 'twixt the
> jack and car when jacking on the frame. But be careful
> about how you place it. The wood may split unless you
> arrange the piece so that the edge of the frame is
> perpendicular to the grain.
>
> But YMMV, so be careful. Always use jack stands, and
> never get under a car that is suppported only by a
> jack (but you all knew that, right?)
>
> Carter Shore
> --- L&B Lubbers <lubbers@sympatico.ca> wrote:
> >
> > Raise the rear of the car by placing the floor jack
> > under the frame cross
> > member (just behind the diff.). Not the diff.
> >
> > Len Lubbers | '79 Spitfire | Ottawa, Ontario, Canada
> > http://www3.sympatico.ca/lubbers
> >
> >
> > ----- Original Message -----
> > From: "John Hobson" <goalie_john@yahoo.co.uk>
> > To: "Spitfires mailing list"
> > <spitfires@autox.team.net>
> > Sent: Tuesday, February 06, 2001 5:56 AM
> > Subject: Oiling trunnions + jacking up
> >
> >
> >
> > I'm sure this is a silly question for many of you,
> > but how do I oil the
> > trunnions through the grease nipple, do I need a
> > special attachment on my
> > grease(oil) gun so that it seals round the grease
> > nipple and the pressure
> > depresses the nipple?
> >
> > Also another, probably silly, question. I have had
> > trouble jacking my
> > car up before in that it is awkward jacking up one
> > side of the car and
> > then the other alternately(twisting chassis, takes
> > ages etc). Is it
> > possible to jack it up at the back at the
> > differential? Is the diff
> > strong enough, is it safe to do etc? Any other
> > hints?
> >
> > Also, I am looking for a reasonable pair of chrome
> > rear horse shoe trim,
> > if any of you UK listers have a pair that are
> > surplas to requirements I
> > would be interested in buying them.
> >
> > cheers
> > John
> Yahoo! Auctions - Buy the things you want at great prices.
> http://auctions.yahoo.com/
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