Four wheel drive

So I am taking it as it is available in the existing gypsys as well. Thanks for confirming. Was not sure of that

This option has to be there since the manufacturers generally instruct (in the manual) that 4 wheel drive should not be used on dry hard roads since it will increase the wear and tear of the tyres. I guess the reason is that the four way differerential gear system will not be that perfect.

Tomy

I got the following mail. But I am not able to see the post. No idea why.

Tomy

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Dear Tomy,

Your subscribed discussion Four wheel drive has just been replied by rebeccaD.

Discussion Link:
http://www.carwale.com/Forums/viewthread.aspx?thread=24536&post=247239

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probably because it was a spam and has been deleted by one of the MODs.

Yes Centaur is right. It was spam. Do ignore such mails if you cant find the related post.

You are right.

There are 2 types in 4 wheel drive systems. 

Part Time - The vehicle is in 2 Wheel Drive mode and the driver gets an option to choose when to engage 4 wheel drive by usually flipping a switch or a lever. Such a system cannot be used on Tarmac as the transfercase cannot differentiate between the speeds on the front and rear propellershafts.

A few vehicles which have part time 4WD are Scorpio, Safari, Thar, Endeavour etc.

 - The vehicle is permanantly engaged on 4 Wheel drive mode. Since its a permanent engagement, a central differential is employed between the transfercase to allow the 2 propeller shafts to rotate at different speeds. Vehicles like Fortuner, Grand Vitara, Outlander etc are full time 4WDs

I hope this clarifies the queries.

Yes, that was very informative.

I was under the impression that only huge special purpose vehicles like tanks, earth movers etc have proper 4-way differential system.

Tomy.