Diff-lock Trouble

Transmissions, Transfer Boxes, Axles, Drive Shafts
RTP
Full Member
Full Member
Posts: 22
Joined: 24 Jun 2015 11:17
Full Name: Richard Poalses
Nickname: RTP
Home Town: Boksburg
Current 4x4: Patrol 4.8
Home Language: English
Has thanked: 7 times
Been thanked: 1 time

Diff-lock Trouble

Post by RTP » 07 Apr 2017 11:04

Hi Guys

I am sure this has been asked before but here goes .

If I try engage diff-lock when in 4L as normal it takes a few meter to engage and the light burns solid , but after a few meter the light starts flashing again and if you turn sharp you can tell the diff-lock has disengaged .

Any Ideas ?
Regards
RTP

User avatar
iandvl
Patrolman 1000+
Patrolman 1000+
Posts: 1058
Joined: 12 Jan 2015 13:26
Full Name: Ian de Villiers
Nickname: Ian
Home Town: Brits
Current 4x4: Nissan Patrol 4.5 GRX
Nissan Hardbody 2.4 4x4
Home Language: English
Has thanked: 115 times
Been thanked: 119 times

Re: Diff-lock Trouble

Post by iandvl » 07 Apr 2017 11:29

RTP wrote:Hi Guys

I am sure this has been asked before but here goes .

If I try engage diff-lock when in 4L as normal it takes a few meter to engage and the light burns solid , but after a few meter the light starts flashing again and if you turn sharp you can tell the diff-lock has disengaged .

Any Ideas ?
IIRC, the Patrol diff is vacuum actuated. This behaviour would lead me to believe you may have a leak in one of the vacuum pipes. Not sure how you test that though.

User avatar
ricster
Patrolman 1000+
Patrolman 1000+
Posts: 5470
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: 175 times
Been thanked: 205 times

Re: Diff-lock Trouble

Post by ricster » 07 Apr 2017 11:43

Yip, I think Ian is correct. trace those vacuum rubber hoses from under the bonnet to the diff. Maybe there is a tiny leak, resulting in the diff lock dis-engaging after a short while.
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

RTP
Full Member
Full Member
Posts: 22
Joined: 24 Jun 2015 11:17
Full Name: Richard Poalses
Nickname: RTP
Home Town: Boksburg
Current 4x4: Patrol 4.8
Home Language: English
Has thanked: 7 times
Been thanked: 1 time

Re: Diff-lock Trouble

Post by RTP » 07 Apr 2017 11:49

I will check the pipes thanks guys
Regards
RTP

User avatar
iandvl
Patrolman 1000+
Patrolman 1000+
Posts: 1058
Joined: 12 Jan 2015 13:26
Full Name: Ian de Villiers
Nickname: Ian
Home Town: Brits
Current 4x4: Nissan Patrol 4.5 GRX
Nissan Hardbody 2.4 4x4
Home Language: English
Has thanked: 115 times
Been thanked: 119 times

Re: Diff-lock Trouble

Post by iandvl » 07 Apr 2017 11:51

Good luck.

And please post your methodologies / findings here for reference. :salute: :salute:

RTP
Full Member
Full Member
Posts: 22
Joined: 24 Jun 2015 11:17
Full Name: Richard Poalses
Nickname: RTP
Home Town: Boksburg
Current 4x4: Patrol 4.8
Home Language: English
Has thanked: 7 times
Been thanked: 1 time

Re: Diff-lock Trouble

Post by RTP » 07 Apr 2017 12:04

Hi Ian

If I have it correct i can swap the pipes at the back by the diff as the other pipe line have vacuum all the time if the diff-lock kicks in and stays in we know we have a leak in the line . :thumbup:
Regards
RTP

User avatar
johanp
Senior Member
Senior Member
Posts: 117
Joined: 21 Jul 2010 10:07
Full Name: Johan Pheiffer
Nickname: Johan
Home Town: Pretoria
Current 4x4: 2004 Patrol 4800 GRX
Home Language: Afrikaans
Location: Pretoria
Has thanked: 1 time
Been thanked: 6 times

Re: Diff-lock Trouble

Post by johanp » 07 Apr 2017 15:11

Hi Richard

When the difflock is off, one pipe will have vacuum. When you switch it on, the other pipe will have vacuum.
If you swap the pipes, you will have to switch the difflock off and then it should engage.
When I had problems with mine I swapped the pipes at the solenoids in the engine bay to test.
My problem was caused by one of the solenoids.

RTP
Full Member
Full Member
Posts: 22
Joined: 24 Jun 2015 11:17
Full Name: Richard Poalses
Nickname: RTP
Home Town: Boksburg
Current 4x4: Patrol 4.8
Home Language: English
Has thanked: 7 times
Been thanked: 1 time

Re: Diff-lock Trouble

Post by RTP » 18 Apr 2017 09:09

Hi Guys

To follow up on the Diff-Lock story. After changing the pipe round in any way way I try I always get the same re-salt .

The Diff-Lock engages after a few meters then if you turn left you can see the inside wheel is lock. But if you turn right the Diff-Lock disengages .

I am worried it may be the gear it self that is worn . does anyone have experience with this?
Regards
RTP

User avatar
Peter Connan
Moderator
Posts: 4966
Joined: 10 Sep 2010 07:21
Full Name: Peter Connan
Nickname: Piet
Home Town: Kempton Park
Current 4x4: 1996 Patrol 4.2SGL
Home Language: Afrikaans
Location: Kempton Park
Has thanked: 189 times
Been thanked: 276 times

Re: Diff-lock Trouble

Post by Peter Connan » 20 Apr 2017 21:46

Not personally but I have heard of cases where the machanicals have broken.

However, there would usually be a loud clacking sound when turning if the mechanics are damaged. I also wouldn't expect there to be any difference in behaviour between a left and a right-hand turn.
Mag ons ons kenniskry met lekkerkry aanhoukry.

User avatar
Rhett
Senior Member
Senior Member
Posts: 301
Joined: 26 Jan 2016 14:48
Full Name: Rhett van der Stelt
Nickname: Rhett
Home Town: Benoni
Current 4x4: 2004 Nissan Patrol 4.8 GRX
Home Language: English
Location: Benoni
Has thanked: 90 times
Been thanked: 31 times

Re: Diff-lock Trouble

Post by Rhett » 22 Jul 2017 10:20

So, not a nice way to revive a post but what choice do I have.

Just tested my diff-lock now again as I haven't used it since Thaba Nkwe.

After engaging the diff-lock in a stationary position, I slowly pull off and snake left and right. Weirdest thing then begins happening. turning right it engages, then when turning back to the left it disengages. As soon as I turn right again is engages. (I am only using the diff-lock light on the dash as an indicator that it is engaging / disengaging)

I want to take it back out a bit later to a bit more open ground where I can see if the inner wheels are digging up grass if I do circles. At this point I am slightly concerned as the river trip is coming up and I'm not happy taking it out if there is a mechanical issue.
The outdoors life for me, thanks.
https://www.youtube.com/channel/UC9e98c ... XUyixKJavQ

Nissan Patrol 4.8 GRX

Save a Rhino, hunt a poacher.

Post Reply

Return to “10. Drivetrain”

Who is online

Users browsing this forum: No registered users and 0 guests