Vehicle & Technical > Range Rover

has my diff locked

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carls200tdi:
with the viscous coupling with one front wheel jacked up you should be able to turn it with a wheel brace very slowly with some resistance if you cant turn it at all your viscous coupling could be seized i used to have a rangie with viscous coupling and thats how you check its working.

muddyman:

--- Quote from: carls200tdi on May 21, 2012, 17:38:24 ---with the viscous coupling with one front wheel jacked up you should be able to turn it with a wheel brace very slowly with some resistance if you cant turn it at all your viscous coupling could be seized i used to have a rangie with viscous coupling and thats how you check its working.

--- End quote ---
I second that I have a range rover with the borg warner tbox and that is how i check the VC

Range Rover Blues:
Viscous diff more or less came in with concealed hinges in 1988/89.

They are chain-driven (to reduce noise and backlash) and have a thermo-viscous hub ahead of a traditional 50/50 diff.  They are menat to lock up when one output spins dramatically faster than the other, though doing this is what leads to their demise.

With one wheel in the air you should be able to tighten the wheel nuts, or loosen them unless you jar on the wrench which will loosen them.

There is a correct torque setting for checking but basically if you can turn it really slowly then it's ok.

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