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Difflock not working

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Difflock not working

Postby Mamba » 22 Sep 2016 11:38

Hi Everyone,

My difflock (2004 4.8 GRX) stopped working this weekend. When I engage the difflock the light comes on immediately. When I start driving I can hear a ratched sound coming from the rear diff, but the locker doesn't work. When the difflock is switched off the diff is quiet.

I jacked up the car last night and test the difflock. I connected the vacuum unit directly to the engine's vacuum to illuminate the valves etc. It still didn't work. The vacuum unit/ lights etc is working and does engage. I drained the oil, and found some metal parts stuck to the drain plug. Does anyone have some spare parts for this locker? Or any other suggestions?

Thanks,
Mamba
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Re: Difflock not working

Postby Dustin » 22 Sep 2016 12:22

Just saw this put up on Gumtree.
https://www.gumtree.co.za/a-cars-bakkie ... 1010430809
Back end will be ok for spares.
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Re: Difflock not working

Postby Dustin » 22 Sep 2016 12:29

You could always put in an Afroxlocker...weld the diff :rolling:
Sorry, I couldn't help but put that out there :biggrin:
Hope you come right :salute:
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Re: Difflock not working

Postby Rhett » 22 Sep 2016 12:32

Hi Mamba

When I engage the difflock the light comes on immediately.


Is the light flashing or does it stay fully burning?

I would test the actuator on the diff. Maybe it's faulty and it's pushing the lock fork against the lock sleeve and making a noise? Not sure if it could even be that but worth a try.
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Re: Difflock not working

Postby Clem » 22 Sep 2016 12:55

Mamba wrote:When I start driving I can hear a ratched sound coming from the rear diff, but the locker doesn't work.


Mamba wrote:I drained the oil, and found some metal parts stuck to the drain plug.


Uh-oh. Doesn't sound good. How big are the metal bits?
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Re: Difflock not working

Postby Wilkie » 22 Sep 2016 13:11

Anton as jy vas brand gee my n lui
Null ag 2 vyf2 vier ag drie 6 2
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Re: Difflock not working

Postby Picasso » 22 Sep 2016 13:42

Re: Difflock not working
Postby Dustin » 22 Sep 2016 12:22

Just saw this put up on Gumtree.
https://www.gumtree.co.za/a-cars-bakkie ... 1010430809
Back end will be ok for spares.


The problem with this option is that you have to buy a smashed car for 92k to get a second hand diff lock.
That makes even a new 28K ARB looker sound cheap.
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Re: Difflock not working

Postby NMAD » 22 Sep 2016 13:56

Mamba wrote:Hi Everyone,

My difflock (2004 4.8 GRX) stopped working this weekend. When I engage the difflock the light comes on immediately. When I start driving I can hear a ratched sound coming from the rear diff, but the locker doesn't work. When the difflock is switched off the diff is quiet.

I jacked up the car last night and test the difflock. I connected the vacuum unit directly to the engine's vacuum to illuminate the valves etc. It still didn't work. The vacuum unit/ lights etc is working and does engage. I drained the oil, and found some metal parts stuck to the drain plug. Does anyone have some spare parts for this locker? Or any other suggestions?

Thanks,
Mamba


I would call David as he has a scrap 4.8 and I think its around a 2004/2005 model.
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Re: Difflock not working

Postby Peter Connan » 23 Sep 2016 05:42

Eish.

Voorspoed!
Mag ons ons kenniskry met lekkerkry aanhoukry.
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Re: Difflock not working

Postby ricster » 23 Sep 2016 08:30

I have a feeling the dog clutch has kicked off its edges. Did you test it in reverse with the wheel up. If it holds when in reverse, but not in forward rotation, then I think the diff lock itself is cooked. If the light is showing solid, then the actuator is registering that the lock is fully engaged, so i doubt its the solenoid or actuator that is faulty.
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