Borg-Warner / Vicious coupling Q? - Land Rovers Only

siam · 09-19-2004, 10:48 AM

I believe from 89 - 94 the Vicious coupling transfercase was used on the Range Rovers and was wondering can someone just give me a little info on these boxes as in if they are in constant 4x4 mode switching only from Hi to Lo. I know that Land Rover switched back to the older Transfer box design due to reliability issues.. Just trying to get some info for the future just in case I run into one.. Thanks Rangies

Ivan · 09-20-2004, 07:16 AM

They are in constant 4 wheel drive (same as all Rangies). The viscous coupling is in place of a manual centre diff lock. It will lock the centre diff automatically when required. I assume it detects the amount of slip between the front and rear axles and locks / unlocks accordingly. Personally I prefer a manual diff lock so that I can decide when it needs to be engaged. Also with a manual lock there is not a lot to go wrong only linkages. Also the viscous coupling types are more expensive to repair/replace.

HTH

Ivan

09-19-2004, 10:48 AM	#1 (permalink)
siam 100 quids for a days work son.. Join Date: Aug 2004 Location: Alameda Island Posts: 238 Gallery: 0	Borg-Warner / Vicious coupling Q? I believe from 89 - 94 the Vicious coupling transfercase was used on the Range Rovers and was wondering can someone just give me a little info on these boxes as in if they are in constant 4x4 mode switching only from Hi to Lo. I know that Land Rover switched back to the older Transfer box design due to reliability issues.. Just trying to get some info for the future just in case I run into one.. Thanks Rangies

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09-20-2004, 07:16 AM	#2 (permalink)
Ivan Member Join Date: Aug 2004 Location: Bedfordshire England Posts: 12 Gallery: 0	They are in constant 4 wheel drive (same as all Rangies). The viscous coupling is in place of a manual centre diff lock. It will lock the centre diff automatically when required. I assume it detects the amount of slip between the front and rear axles and locks / unlocks accordingly. Personally I prefer a manual diff lock so that I can decide when it needs to be engaged. Also with a manual lock there is not a lot to go wrong only linkages. Also the viscous coupling types are more expensive to repair/replace. HTH Ivan

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