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Re: [Spits] Rear Spring

To: Richard Gosling <rbgosling@googlemail.com>, spitfires@autox.team.net
Subject: Re: [Spits] Rear Spring
From: Luke Lewis <superluke@execulink.com>
Date: Mon, 09 Nov 2009 11:53:05 -0500
Just to add my 2 cents to this - I find that the attitude the car takes 
when parked depends directly on who was in it when it was driven.  The 
geometry being what it is, when the car comes to a stop with weight on 
the driver's side only (As mine is 95% of the time, and I weigh 225) the 
only way for the left rear suspension to push the body back up to it's 
relaxed height would be for the tire to slide sideways!  I tried this 
out on an alignment rack with sliding pads and the car came right up to 
level every time I got out.  When one weighs over 1/10 of the overall 
vehicle weight there isn't much chance of stopping this effect, other 
than the individually-controlled air shocks some guys have installed.

(Not replying to you directly, Richard, by the way!  You're right about 
front springs too - mine made an enormous difference)


> If you are worried about the car leaning to the drivers side, your focus
> needs to be on the front suspension, not the rear (with a swing-spring
> car).  The point of a swing-spring is that it swings - it therefore offers
> no resistance to roll.  Well, one leaf is fixed, so it offers a very little
> resistance, but not enough to cause or to fix a lean to one side.  Any roll
> issues should be addressed by the front springs and/or the anti-roll bar
> (unless you use adjustable air shocks at the rear, which always strikes me
> as a bodge that addresses the symptom not the cause, plus front springs are
> so much cheaper anyway!).
>
> People talk about "rear end drivers side sag".  That talk scares me - do you
> really think the car is only sagging to the drivers side at the back???
> Unless your chassis is twisted, it should be leaning by exactly the same
> amount at the front!!!  Because of the styling of the car, it tends to be
> more visible at the rear, so I guess that's why this phrase arises.  What
> worries me is that people think that, just because the sag is more visible
> at the rear, it must be the rear suspension that needs fixing...
>
> Richard
>
> 2009/11/9 Dennis Reese <dennis_reese@verizon.net>
>
>   
>> I've been following this thread because my 1500 suffers from driver's side
>> rear end sag and my next project is to fix it. I've been told to "replace
>> the spring itself", "replace the shocks", "do both", "replace the front
>> coils". I had planned to replace the spring, but after reading what Greg has
>> done i wonder if that might be the solution. Any advice, thoughts from the
>> experts?
>>
>> Thanks,
>> Dennis
>>     
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