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XJ 4wd system

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lucky:
Hi all,

I am currently looking to buy a Cherokee XJ. I used to off road a classic range rover but fancey a change. I have seen 2 different 4wd systems for the XJ on the internet. From what i cam make out one u can only use off road ( with a center diff lock ?? ) and the other where you can used the 4wd option on road.

Where both systems sold in the uk??

Is one better than the other for any reason??

Are either of the center diffs viscous??

thanks for any help in this matter, any other advice on what option / models are best, would also be much appreciated

Cheers
Lucky

Bishops Finger:
If Im right..

For all XJ's ..

Diesels and 2.5 sports have a semi permanent 4wd system whch entails moving a lever to engage 4wd

The 4 litres have a different transfer case which means should you choose you can run in full time 4wd

Mort:
Hi Lucky

The 2 systems are:-

Command Trac - as fitted to the diesels and 2.5l petrol (which all have manual transmission).  These have 2WD, Part-Time 4x4 High Ratio and Part-Time 4x4 Low Ratio.  Neither of the 4WD positions can be used on-road, as the centre diff in the T/C is locked - although you could use it in deep snow on-road, but with caution.

Selec-Trac - as fitted to the 4.0 petrol variants (which all have auto transmission).  This offers all the above settings plus Full-Time 4x4, in which the centre diff in the T/C is open.  This can be used at all times and in all conditions when on-road.

Other (hopefully) useful info:-

The diesels, 2.5 petrol and pre '97 4.0 petrol are fitted with a rear LSD.  The Post-Facelift '97-on 4.0 versions are not.  I believe that the Post-Facelift versions had galvanised bodies.  They are certainly less prone to rust.

You can change between 2WD and Part-Time 4x4 (and 2WD, Part-Time 4x4 and Full-Time 4x4 on the 4.0) 'on the fly' at speeds of up to 55 mph.  You'll need to stop when engaging Part-Time Low ratio.  The T/Cs are old fashioned cogs and chains.

I'd go for the Selec-Trac on a '97-on Post-Facelift 4.0 every time - although the previous versions can be picked up for silly money - sometimes as low as £800.  If fuel consumption is an issue, then get one that's been converted to LPG.

Finally, don't be put off by the auto transmission.  They are surprising good off-road (I prefer them by far).

lucky:
thanks for the advice ,

thats a big help. Glad to hear the pre 97 has a LSD no more getting cross axeled  :D

CaptainColourful:
My 98 reg ( xj ?) 4 litre is fitted with yet another variation ... Quadra-Track.
This is a full time 4 wheel drive with low and high ratios, which are changeable at 2-3 mph with the gear selector in Neutral ( similar to Disco)
Trac-Lok rear axle is basically a limited slip diff.. There is no diff lock fitted to these models as far as I know.

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