Vehicle & Technical > Range Rover

Diff locks - old and new types - which is best?

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Difflock:
How can you tell then if the viscous type diff lock is sh***ed,had mine (1992 Turbo D) jacked up in work Today so I could sort a power stearing pump leak out and thought I would see if it would drive forward with just the rear wheels on the ground as its only got the high and low lever,it moved  :shock:  :shock:  does that mean its seized and can you repair it if it is  :cry:  :cry:

Range Rover Blues:
With a handle like Difflock I'd have thought you'd know :wink:

The thermo-viscouos fluid thickens when slipping occurs but is always stiff, so although you might be able to slowly turn one prop by hand, as soon as you try to drive the car the stuff locks up, it will slip just enough to release the wind-up.  I find I can just turn the handbrake drum very slowly, I can tighten a propshaft nut up against the viscous hub, or remove a wheel nut even :shock: .  You should be able to turn one wheel VERY slowly with it jacked up.

Difflock:
Difflock only in name Iam affraid my friend but give me a couple more weeks tinkering and I'll have it sussed  :wink:  :wink:

Range Rover Blues:
Ok, well with one wheel jacked up you should be able to turn that wheel slowly, especially if youuse the nut wrench for leverage.  If the viscous unit is goosed it can be swapped in situ by removing the front end of the transfer box, it's not half the weight of the T-box but still heavy.

Skibum346:

--- Quote from: "Difflock" ---How can you tell then if the viscous type diff lock is sh***ed,had mine (1992 Turbo D) jacked up in work Today so I could sort a power stearing pump leak out and thought I would see if it would drive forward with just the rear wheels on the ground as its only got the high and low lever,it moved  :shock:  :shock:  does that mean its seized and can you repair it if it is  :cry:  :cry:
--- End quote ---


Big diagnosis point is scrubbing of the front wheels on full lock. Try turning tight circles with it and if you can hear scrabbling from the front this is an indicator.

Skibum

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