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mark
Veteran
Date registered: Apr 2006
Location: UK
Vehicle(s): G300TD
Posts: 161
| diff locks on 463 problem
I have a 92 463, I have an intermitant problem where the centre diff will not engage but rear and front will, after a while. I can feel the rear in and the front but once I have one wheel of the ground it wont move, which means the centre diff is not working. Where should I start to look for the fault. |
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DUTCH
Administrator Doppelgänger
Date registered: Apr 2006
Location: US, GA, Atlanta
Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter
Posts: 9963
| RE: diff locks on 463 problem
mark - 11/15/2006 6:17 AM
I have a 92 463, I have an intermitant problem where the centre diff will not engage but rear and front will, after a while. I can feel the rear in and the front but once I have one wheel of the ground it wont move, which means the centre diff is not working. Where should I start to look for the fault.
I would check the vacuum lines in the system, as the center TC diff lock is purely vacuum operated. As mentioned elsewhere. there is a diaphragm or O-ring internal to the TC that also could have failed. Attached is a diagram of the system showing all the components. Hopefully, this may give you a hand in diagnosing your problem.
The diaphragm is #23 in the exploded parts image. If you want the Part Number for your truck, send me your VIN by email.
 (DiffLocks.jpg)
 (TC_DiffLock.jpg)
Attachments
----------------
 DiffLocks.jpg (108KB - 14 downloads)
TC_DiffLock.jpg (52KB - 15 downloads)
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MiN
Extreme Veteran
Date registered: May 2006
Location: Alpujarras, Spain
Vehicle(s): No cars, at all.
Posts: 555
| RE: diff locks on 463 problem
I had this exact problem about 6 weeks ago and Dutch helped me track it down. Having checked the vacuum system from the pump to the TC I discovered the problem was in the TC bell housing. It turned out that the diaphragm (part no. 23 in Dutch's diagram) had split and would not hold a vacuum and thus the centre diff lock would not engage - buth the front and rear would. If you do a search you will see the trail of threads on this. Having replaced the diaphragm the problem was solved. I also replaced the 'O' ring (part no. 17) as well.
Mike. |
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4x4abc
Date registered: Apr 2006
Location: La Paz, Baja California, Mexico
Vehicle(s): 02 G500
| RE: diff locks on 463 problem
mark,
if indeed both front and rear are locked, and the center is not, even with two diagonally opposed wheels off the ground, the truck has to move - unless one of the wheels on the ground has substantially less traction than the other (then the center diff will allow the axle on slippery stuff to rotate faster). Could also mean you are too hard on the gas. |
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roughneck
Expert
Date registered: Apr 2006
Location: UK, Germany & USA
Vehicle(s): 270 cdi.300 GD 300 GE.lwb 300 GE.swb. Disco 2
Posts: 4398
| Re: diff locks on 463 problem
Very odd, I met someone in Wales last weekend with exactly the same problem and I gave them about the same diagnosis, must be a very common fault on 463s, |
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G wizz
Elite Veteran
Date registered: Apr 2006
Location: Uk
Vehicle(s): Dont own a G anymore, Too expensive!!!!
Posts: 686
| RE: diff locks on 463 problem
4x4abc - 11/16/2006 4:05 AM
mark,
if indeed both front and rear are locked, and the center is not, even with two diagonally opposed wheels off the ground, the truck has to move - unless one of the wheels on the ground has substantially less traction than the other (then the center diff will allow the axle on slippery stuff to rotate faster). Could also mean you are too hard on the gas.
your right I was, thank for the info, going into workshop for repair work. check out our recent outing on my website.
http://web.mac.com/ianwatson158/iWeb/G%20Wizzer/Brecon%20beacons.ht...
Edited by G wizz 11/19/2006 6:35 PM
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