austen
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You cannot drain fluid from a Naggered vcu as it turns into a jelly, the only way to recon a vcu properly is to cut it open.
You cannot drain fluid from a Naggered vcu as it turns into a jelly, the only way to recon a vcu properly is to cut it open.
Hi Austen,
Thanks for the input and I'm sure you know what your talking about. But it would be interesting to find out what Jonaf, is talking about.
I know what your saying. But in all fairness to Jonaf, he seems to know what he's on about. Hopefully he'll come in here and tell us more on what he's been doing regarding the VCU testing.
My VCU slip adjustments are just experiments. But the results work OK for my needs. It would be interesting to know in which way others' attempts to loosen up stiff VCUs have failed.
When I get time I will make further experiments. The unit I took out yesterday was just a little bit stiffer than a new one but I will try to adjust it by diluting the fluid with thin silicone oil, which is easier to find.
I like my VCUs to be on the loose side and I think they transfer enough torque even if they slip a little.
the VCU should use something similar to the VW Syncro cars. Their VCU is maintainable! This is the Fluid used. 25 kg = 800 Euros
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Austen - having just read this article on the VW VCU, the following comments were made.....
"The plates inside the Viscous Couplings have microscopic burrs on them that are critical to the proper torque transfer of these units. This means that the plates wear out and cannot be reused!
Since replacement plates are not available, this means Viscous Couplings should not be rebuilt until a source of replacement plates can be identified.
Any viscous coupling under pressure is likely a bad viscous coupling! If you open the unit, and a lot of VC juice comes out, the VC is likely bad.
Viscous Couplings have a useful life of 60,000 to 90,000 miles. After that, they are worn out and should be replaced. This makes it sound like they should be replaced as often as your clutch!"
I know that the Freelander VCU also has the "burrs" on the plates - what is your take on this?
Think VCU's should be left well alone to the experts, anything DIY to an important part like this that can fail and cause a dangerous situation should not be attempted IMHO
What about brakes, are they "important" and should therefore not be touched by "the DIYer"?
you would need a center diff ,the answer is just fit a new oneI actually wonder whether there isn't a way to junk the VCU altogether and engineer a way to fit a simple electromagnetically activated dog clutch in its place.
It's commonly used in the agricultural sector as a robust way of engaging/disengaging drive so why not on a Freelander?
Has anyone tried this yet?
you would need a center diff ,the answer is just fit a new one
You cannot drain fluid from a Naggered vcu as it turns into a jelly, the only way to recon a vcu properly is to cut it open.
it is a good one, but freelander isnt 50/50 split rear wheels are driven slightly slower to give 4wd car with fwd feel ,incedently the 4wd mfs had front wheels driven faster in 4wd so that front wheels didnt hinder rear
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