4W Driving

Submitted: Thursday, Sep 08, 2005 at 13:37
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Hi Guys

Hope you don't think this a silly question, but recently read an article where the author mentioned locking the front free-wheeling hubs.....but not engaging 4WD

Could someone explain under what circumstances this is appropriate

Thanks, David
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Reply By: hoyks - Thursday, Sep 08, 2005 at 13:43

Thursday, Sep 08, 2005 at 13:43
When you think that you might want 4x4 in the near future.

Saves getting out in the mud to lock the hubs when it might not be convienent, say when you have rounded a corner to find the road is slop.
In that case, simply back off the accelerator, clutch in and into 4H. The front diff will be spinning from the drive provided by the wheels turning on the road surface so there won't be any horrible grinding noises from the transfer case, the teath will simply engage and away you go.

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Follow Up By: Member - Roachie (SA) - Thursday, Sep 08, 2005 at 14:04

Thursday, Sep 08, 2005 at 14:04
G'day mate,
Have to slightly disagree with you there, as far as needing to back-off, clutch in etc. I have always been happy to gently pull the transfer case lever back to 4H on the run, without backing off and without de-clutching so long as I have the front hubs locked in. The only time this would not be appropriate is if your vehicle is already in a "slipping" situation (eg: you're stuck in mud and have the back wheels spinning whilst the vehicle stands still or is barely moving).
As long as you're driving on a surface where the front wheels are likely to be going the same speed as the rears, there should be need to do anything significant; maybe lift off the power momentarily at the most.
Just my opinion as relates to Patrols.
YMMV
Roachie
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Follow Up By: hoyks - Thursday, Sep 08, 2005 at 14:31

Thursday, Sep 08, 2005 at 14:31
In my Sierra I used to just dump it in and out of 4H/2H by backing off the power (what little there was) with no clutch but on the Terrano it can be a bit stiff without the clutch.
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Follow Up By: Member - JohnR (Vic)&Moses - Thursday, Sep 08, 2005 at 17:41

Thursday, Sep 08, 2005 at 17:41
With you on that Roachie as you say in a slipping situation it is better just to take a foot off the accelerator to equalise front and rear axle speeds. If the rears are slipping and/or the fronts not turning it could put a huge strain on the transmission just to drop 4wd in without the similarity of speeds.
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Reply By: hl - Thursday, Sep 08, 2005 at 13:46

Thursday, Sep 08, 2005 at 13:46
Hi,

2 reasons..

1. If 4WD is not used a lot, do it every few weeks for a day to keep things lubricated.

2. When driving on slippery/rough roads, you can engage/disengage 4WD on the fly without having to get out and lock the hubs!

Cheers
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Reply By: Member - Chrispy (NSW) - Thursday, Sep 08, 2005 at 13:47

Thursday, Sep 08, 2005 at 13:47
I also lock my hubs from time to time to get the diff and shafts spinning in oil for a while. Otherwise they just sit there half-submerged in oil - half in/half out. I've seem the top of crown wheels and whatnot actually go rusty if it hasn't been engaged in a while.
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Follow Up By: David - Thursday, Sep 08, 2005 at 14:08

Thursday, Sep 08, 2005 at 14:08
Thanks guys.....thought it may have bee something like that
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Follow Up By: Member - JohnR (Vic)&Moses - Thursday, Sep 08, 2005 at 17:46

Thursday, Sep 08, 2005 at 17:46
spot on Chrispy, have had universals seize too, when they are used again after no lubrication over summer. Everything needs to be lubricated a bit even when not in use.
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Reply By: equinox-Kings Canyon - Thursday, Sep 08, 2005 at 15:59

Thursday, Sep 08, 2005 at 15:59
I've had my hubs locked in, pretty much since I bought my cruiser 6 weeks ago. There's no point really unlocking them. Apart from going to the shop and back most of my driving is on gravel and I use 4WD about 10% of the time.

Eq.
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Reply By: Member - Brian (Gold Coast) - Thursday, Sep 08, 2005 at 16:29

Thursday, Sep 08, 2005 at 16:29
Not a silly question at all David, there was a time when NONE of us knew the answers.... ;-)

As with all of the above, although I don't unlock my hubs, I am happy to kreep them locked in so we are "ready" to slip it in to 4wd at the drop of a hat. We are off road fairly regularly anyway and it doesn't do any harm to leave them locked in. Big thing to remember is to NOT have your 4WD activated on hard surfaces such as bitumen roads etc or you risk Transmission Wind-up which can be terminal for your drive train.
So you CAN leave your hubs in..... BUT only throw the LITTLE stick into 4by when you are off road.

It sounds like you are new to four wheel driving?? if so give serious consideration to joining a club, the depth of knowledge available is amazing.... everything we have learned is directly from belonging to our club.

Hope this helps
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Follow Up By: Bonz (Vic) - Thursday, Sep 08, 2005 at 18:07

Thursday, Sep 08, 2005 at 18:07
Brian, I have always known the answers, but I never know all the questions, none of us do. :)
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Follow Up By: Member - Chrispy (NSW) - Thursday, Sep 08, 2005 at 19:14

Thursday, Sep 08, 2005 at 19:14
Yup - I agree. For everything that Jenny and i now know about 4WD'ing and camping - we have learned 90% from our various clubs we have belonged to and people we have met out there in the bush, and the rest from books and magazines.

No.... make that 95/5
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Follow Up By: Sarg - Thursday, Sep 08, 2005 at 23:38

Thursday, Sep 08, 2005 at 23:38
There was a time also (long time ago ) when NONE of the 4x4's available had free wheeling hubs
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Follow Up By: Member - Brian (Gold Coast) - Friday, Sep 09, 2005 at 06:36

Friday, Sep 09, 2005 at 06:36
Bonz... I have always found that just when I think I know the answers.... someone changes the questions anyway!!!!
;-))
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Follow Up By: David - Friday, Sep 09, 2005 at 08:00

Friday, Sep 09, 2005 at 08:00
Thanks Brian..........appreciate the advice

Rgds, David
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Follow Up By: Bonz (Vic) - Friday, Sep 09, 2005 at 13:47

Friday, Sep 09, 2005 at 13:47
hahah Brian, yes the questions may be different but you use DIFFERENT answers you see? You keep the other answers for when someone asks the question that answer is relevant to.

Its a tangled web but one nevertheless that we all ascribe to.
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Reply By: snailbate - Thursday, Sep 08, 2005 at 21:08

Thursday, Sep 08, 2005 at 21:08
hi guys
when you have all whell drive you can lock the centre dif lock before you get into the slipery stuf then when you have rear dif lock you press the button and it is not a problem
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Follow Up By: muzzgit (WA) - Thursday, Sep 08, 2005 at 23:50

Thursday, Sep 08, 2005 at 23:50
What do you mean exactly?
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Reply By: Member - Terry B (NSW) - Friday, Sep 09, 2005 at 16:48

Friday, Sep 09, 2005 at 16:48
Hi guys
the land rover model i think after 1967 when the Range Rover came out the vehicle did not have free wheeling hubs thay have allweel drive and to make this work there is what is called a centre dif this allows the 4 axles to turn seperatle that is you have a type of 4 wheel drive all the time even on tar roads some of the pundits on toyes said this uses more fuel which is probely correct, Now when you get on to slipery dirt(ALSO YOU CAN ENGAGE LOW RANGE ON TAR ROADS ) with this system, on slipery roads you push or pul the lever to dif lock that is it locks up the centre diff and then you have normal 4wd. Then there is another option which is called dif lock which toyes have as a option and LAND ROVERS have 4 wheel traction control Just like Ford and Holden on there latest vehicles.YOU instal diff lock into your rear dif and if you are flush with dollars instal it in the front diff, then to operate u have a button to push and pull.
i hope i did not put to sleep
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