Leaving the front hubs locked

Transmissions, Transfer Boxes, Axles, Drive Shafts
Wilkie
Patrolman 1000+
Patrolman 1000+
Posts: 1402
Joined: 24 Feb 2014 15:33
Full Name: Errol Wilken
Nickname: Wilkie
Home Town: Pretoria
Current 4x4: 1999 4.5 GRX Nissan Patrol
2004 BMW 3.0D X5
Home Language: Afrikaans
Has thanked: 69 times
Been thanked: 92 times

Re: Leaving the front hubs locked

Post by Wilkie »

I know of one advantage of having the front hubs locked.....You can engage 4x4 while on the move and disengage .Your whole front power train is rotating at the same speed as the transfer box ,take your foot off the acc and pull the short
lever gently and get back on the gas :mytwocents: :mytwocents:
Clem
Patrolman
Patrolman
Posts: 902
Joined: 19 Jun 2013 15:16
Full Name: Clem Daniel
Nickname: Clem
Home Town: Johannesburg
Current 4x4: Patrol 4.8
Home Language: English
Has thanked: 35 times
Been thanked: 37 times

Re: Leaving the front hubs locked

Post by Clem »

Yep. That's how it works in a Series Landy too!
OEBIE
Junior Member
Junior Member
Posts: 12
Joined: 06 Sep 2012 18:55
Full Name: SOULBY KITCHING JACKSON
Nickname: OEBIE
Home Town: KIMBERLEY
Current 4x4: PATROL GRX 4.8
Home Language: AFRIKAANS
Has thanked: 3 times

Re: Leaving the front hubs locked

Post by OEBIE »

Hi! I've never locked my front hubs since I bought the 1 month old 2006 model 4.8 GRX. I do engage 4x4 whenever I hit dirt road in order to lubricate the front dif. Is it really necessary to manually lock the front hubs to get everything lubricated properly?
Could you also comment on another 2 questions?
1. There is an Ausie youtube where a guy talks about the 10 things you might not have known about the Patrol, one being the fact that you can engage and disengage 4x4 at higher spreads than if they are auto locked. Is this true?
2. When it is auto locked, do the front wheels have traction in reverse gear? May be it is only intended for real tough terrain, not often encountered driving the best 4x4 by far! :clap:
User avatar
Michael
Moderator
Posts: 2479
Joined: 05 Mar 2014 14:39
Full Name: Michael
Nickname: Steyn
Home Town: Centurion
Current 4x4: Patrol GU 4.2 Turbo Diesel
Home Language: Afrikaans
Location: Centurion, PTA
Has thanked: 189 times
Been thanked: 336 times

Re: Leaving the front hubs locked

Post by Michael »

Hi Oebie

You dont have to lock the hubs in order to lube the front diff, the only atvantage of keeping it in auto is you dont have to get out to disengage the hubs.......you just put it in 2H and reverse a couple of meters. You will hear the hubs click

1. Im not sure on this, but makes sense as the front diff will already be turning the same speed as the rear diff when the bubs are engaged

2. When the bubs are on auto and you engage 4x4 they will stay locked regardless if you reverse or not. They will only disengage when you reverse in 2H. I only manually lock them when doing a trail or doing proper offroading, but have also left them in auto a couple of times.

Hope this helps
"The Just shall live by Faith" Rom1:17

Check out my build here My Patrol
And my engine rebuild here mostly engine related stuff
OEBIE
Junior Member
Junior Member
Posts: 12
Joined: 06 Sep 2012 18:55
Full Name: SOULBY KITCHING JACKSON
Nickname: OEBIE
Home Town: KIMBERLEY
Current 4x4: PATROL GRX 4.8
Home Language: AFRIKAANS
Has thanked: 3 times

Re: Leaving the front hubs locked

Post by OEBIE »

Thanks, Michael. I'l try that out when going on a 4x4 trip in Knysna area with RSG 4x4 club. My first time with them.
Brett Bignoux
Full Member
Full Member
Posts: 40
Joined: 04 Aug 2011 19:32
Full Name: Brett Bignoux
Nickname: Brett Bignoux
Home Town: Heatonville
Current 4x4: Datsun Safari Pick Up 1982 , Nissan Ruff , Yamaha Wolverine . Datsun Safari Wagon 1982
Home Language: English
Has thanked: 2 times
Been thanked: 9 times

Re: Leaving the front hubs locked

Post by Brett Bignoux »

GOOD DAY GENTLEMEN ,

For those of you that need to know , auto free wheel hubs should not be engauged above about 10km/h . They work on a system similar to a ONE WAY BEARING .
When the side shaft turns and the wheel is stationary , the auto locking system activates to drive the wheel . The same applies in reverse . If they are locked pulling forward , when you stop and go in reverse , they will unlock and then lock in reverse the moment there is a bit of rear wheelspin . Engaugeing 4x4 at speed with auto free wheel hubs is really not a good idea ! You have a transfer box running at speed , suddenly trying to engauge a stationary drive shaft ! The 4x4 selector ring has dog teeth which do not like to engauge at vastly different speeds ! NO , YOU DON"T WANT TO BREAK DOG TEETH IN A GEARBOX !
If the hubs are manually locked , 4x4 can be selected up to 100km/h . Over 100km/h is risky , due to possible different tyre pressures causing a slight difference in rolling diamatre , which will cause instability very very quickly ! Patrols can take up to 600KW through the standard drive train without modifications , but you still need to treat them the right way !

Enjoy guys , we'll see you out there !
Can we get rid of STUPID DRIVERS before they kill us ?
User avatar
davidvdm
Patrolman
Patrolman
Posts: 627
Joined: 13 Sep 2011 15:47
Full Name: David vd Merwe
Nickname: David - Hillbilly
Home Town: West Coast
Current 4x4: 1997 2.7TD Nissan Sani Mk3 4x4 SFA (SAFANI)
Home Language: English/Afrikaans
Has thanked: 4 times
Been thanked: 48 times
Contact:

Re: Leaving the front hubs locked

Post by davidvdm »

Your front and rear props need to be running damn close to same speed for the TC to move from 2H to 4H. My Hardbody will not go from 2H to 4H if I had forgotten to lock the front hubs. I also felt at high speed, that the TC holds back to engage to 4H till the props are matched speed.

I am pretty sure that the Patrols and most Nissans would work on the same principles. I have managed to change at speeds as high as 130km/h, And that still on the tar as I am about to go onto gravel.
David - Bfreesani
1997 Nissan Sani MK3 2.7TD - Hillbilly (SAFANI)
MQ C200 SFA
MQ H260 LSD Rear
MQ Transfer as second low range
5" Lift
33"x12.5x15" tires on 8.5J rims - Want 35's
DIY rock sliders
DIY Snorkel
Madman EMS
User avatar
ricster
Patrolman 1000+
Patrolman 1000+
Posts: 5850
Joined: 13 Jan 2010 11:16
Full Name: Cedric Warner
Nickname: Cedric
Home Town: Alberton Gauteng
Current 4x4: '99 Nissan Patrol 4.2 Turbo Diesel
Home Language: English
Location: LA..... No not Los Angles ..... Lower Alberton, Gauteng
Has thanked: 591 times
Been thanked: 468 times

Re: Leaving the front hubs locked

Post by ricster »

But that's with manual locking hubs, with auto hubs. What will spin up first to get the front diff up to speed before the system is fully engaged.... :think: :think:
Regards
Cedric
Nissan Patrol GL 4.2 Diesel Turbo (Iron Maiden)
Nissan SANI 3.0 V6 4x4 (SOLD)
Isuzu KB 280 DT 2x4 ('ol Smokey) - SOLD
Suzuki TL 1000R "V twin" (Growler) - SOLD
Clem
Patrolman
Patrolman
Posts: 902
Joined: 19 Jun 2013 15:16
Full Name: Clem Daniel
Nickname: Clem
Home Town: Johannesburg
Current 4x4: Patrol 4.8
Home Language: English
Has thanked: 35 times
Been thanked: 37 times

Re: Leaving the front hubs locked

Post by Clem »

Nothing, unless you manually lock the auto hubs first.
User avatar
davidvdm
Patrolman
Patrolman
Posts: 627
Joined: 13 Sep 2011 15:47
Full Name: David vd Merwe
Nickname: David - Hillbilly
Home Town: West Coast
Current 4x4: 1997 2.7TD Nissan Sani Mk3 4x4 SFA (SAFANI)
Home Language: English/Afrikaans
Has thanked: 4 times
Been thanked: 48 times
Contact:

Re: Leaving the front hubs locked

Post by davidvdm »

Clem wrote:Nothing, unless you manually lock the auto hubs first.
Did I mention I hate Auto Hubs :mytwocents: .... Take control, get manual hubs :blonde:
David - Bfreesani
1997 Nissan Sani MK3 2.7TD - Hillbilly (SAFANI)
MQ C200 SFA
MQ H260 LSD Rear
MQ Transfer as second low range
5" Lift
33"x12.5x15" tires on 8.5J rims - Want 35's
DIY rock sliders
DIY Snorkel
Madman EMS
Post Reply

Return to “10. Drivetrain”

Who is online

Users browsing this forum: No registered users and 12 guests