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paulhide
P4


Joined: 20 Dec 2003
Posts: 1607
Location: Oh Beautiful Billingham
PostPosted: Fri Dec 28, 2007 7:19 pm    Post subject: P4 Gearbox Reply with quote
Does anyone know if there is an easy way to check if the electro-magnetic coupling on a P4 gearbox is working out of the car?
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Alan
Alfasud


Joined: 15 Aug 2007
Posts: 48
Location: Slovenia - Ljubljana
PostPosted: Sun Dec 30, 2007 9:35 pm    Post subject: Reply with quote
Yes, just put two wires to the battery.
This is the cable (red one) it has one red and one black wire i think, red goes on + and black on - You should hear a "click" if it's working, and propshaft should turn the gearbox aksle if in gear.


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Admin
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Joined: 19 Feb 2003
Posts: 1223
Location: Stafford, UK
PostPosted: Mon Dec 31, 2007 12:38 am    Post subject: Reply with quote
Alan wrote:
You should hear a "click" if it's working, and propshaft should turn the gearbox aksle if in gear.


Don't think it should matter if it is in gear or not. If it did then the drive to the rear wheels would have to come from the first shaft in the gearbox and would turn at engine speed rather than the speed of the gearbox output.

All the best

Keith
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Alan
Alfasud


Joined: 15 Aug 2007
Posts: 48
Location: Slovenia - Ljubljana
PostPosted: Mon Dec 31, 2007 11:11 am    Post subject: Reply with quote
Sorry for my bad english, i mean the axle where the clutch goes.
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paulhide
P4


Joined: 20 Dec 2003
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Location: Oh Beautiful Billingham
PostPosted: Mon Dec 31, 2007 2:16 pm    Post subject: Reply with quote
So what does the electro-magnetic sensor detect?
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Joined: 19 Feb 2003
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Location: Stafford, UK
PostPosted: Mon Dec 31, 2007 7:08 pm    Post subject: Reply with quote
paulhide wrote:
So what does the electro-magnetic sensor detect?


It just connects / disconnects drive to the viscous coupling / back axle under control of a control unit. Few things cause it to disconnect (braking hard for example).

All the best

Keith
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