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4wd on snow covered road

  • doddy
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04 Mar 2018 17:15 #189925 by doddy
4wd on snow covered road was created by doddy
hello

I have just changed form a Mitsubishi pajero to an 07 jimny

reading the manual it seems to say don't drive on roads in 4wd mode (it is a confusing manual)

my question is am ok to drive on tarmac in 4wd mode

thanks in advance john

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04 Mar 2018 17:20 #189926 by mlines
Replied by mlines on topic Re:4wd on snow covered road
No you are not.

It is part time 4WD with no centre differential so can only be used when there is some way of slip occurring in the system

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Martin

2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses
The following user(s) said Thank You: doddy

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04 Mar 2018 19:12 #189934 by Busta
Replied by Busta on topic 4wd on snow covered road
If the tarmac road is covered in snow or ice then it's fine. But tarmac, wet or dry, is too grippy to allow the wheelslip required to keep the 4x4 system happy.

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  • Young Pretender
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04 Mar 2018 19:20 - 04 Mar 2018 19:21 #189935 by Young Pretender
Replied by Young Pretender on topic 4wd on snow covered road
Was just going to say the same. You can engage 4WD on snow covered roads no problem. But there's always some judgment because if moving from snow covered roads to roads that have been cleared of snow you want to enage normal 2WD.

Have a read up on 'transmission wind up' which will explain why. Essentially your 4WD is relatively less sophisticated than modern 4WD in that all 4 wheels have to turn the same number of rotations. Because the front wheels can turn left/right they can rotate at different speeds meaning the front and rear prop shafts that meet in your transfer box are twisting. On a slippery surface they can unwind themselves but not on tarmac.. modern 4x4's have a differential in the transfer box that can unwind.
Last edit: 04 Mar 2018 19:21 by Young Pretender.

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  • doddy
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04 Mar 2018 19:53 #189938 by doddy
Replied by doddy on topic 4wd on snow covered road
thanks for all of the replies
ive just sold an old pajero , with that one you could keep it in 4wd (not diff lock) even if you went on to a road where the snow had cleared .

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  • helijohn
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04 Mar 2018 22:03 #189941 by helijohn
Replied by helijohn on topic 4wd on snow covered road

doddy wrote: thanks for all of the replies
ive just sold an old pajero , with that one you could keep it in 4wd (not diff lock) even if you went on to a road where the snow had cleared .


You must have had super select 4WD which mine has. It's a pretty sophisticated four wheel drive. I also have a limited slip diff which I bet yours had. The comments are right.

You really do need to get used to not using 4WD unless you are sure there is good slippage like soggy deep mud. I really noticed axle wind up in my Jimny.
How do you like the transition from Paj to Jimny? My Paj is a 1992 and still going strong. I just feel vilified cos it is an old diesel.

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