The rear view mirror auto dims when the switch is in and someone with
bright headlights is behind you. You are right in that it isn't a big
deal or a big amount of difference.
The economy switch probably changes up a gear earlier thus giving you a
negligible increase in fuel consumption at the expense of making your
vehicle feel slow.
Your previous Jeep, switchable between 2wd and 4wd, had a "part time"
system. This means that when it was in 4x4 mode, power was delivered to
both the front and rear axles which rotate at the same speed.
Unfortunately, tyres aren't exactly the same size and when going round
corners the two axles don't travel the same distance, so something has
to give - so you have to use part time 4x4 on loose surfaces where
slippage is possible. Or use it on hard surfaces and let your
transmission break.
The Quadratrac is a "full time" 4x4 system. This means that power is
delivered to both the front and rear axle,but there is a differential or
viscous coupling which enables the front propshaft to spin at a
different speed to the rear propshaft. This means that you are free to
use your 4x4 on hard surfaces. You probably can lock the coupling to
effectively turn it into a "part time" system (on loose surfaces).
Dave Milne, Scotland
>nichollette wrote:
> Hi,
>
> I've recently bought a 1998 GC Orvis, but there's not user manual with
it.
> I've had one on order with the dealer, but they don't seem to be
> interested..so.. a couple of questions..
>
> Anyone know where I can maybe pick up a user manual? New, or used, I
don't
> mind..
>
> There seems to an economy switch - what does this do, exactly? there
seems
> to be some sort of change takes place, perhaps in the gearbox.
>
> The rear view mirror has an illuminated switch, which doesn't seem to do
> anything - I assume it's supposed to be an anti-dazzle feature?
>
> There are a few other things that are a bit of a mystery to me - like -
> Quadra Trac, I think it's called - the vehicle is always in 4 WD. How
does
> this differ from my previous jeep which was switchable between 2WD &
4WD? I
> mean, what's the difference between Quadra Trac and my old one, in 4WD
mode.
>
> I'm not too savvy on car things, so, take it easy, please!
>
> I'm in Ireland, incidentally.
>
> Nichollette
>
>
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