Testing a Freelander VCU
Today I backed out of my drive in my XEDI and on steering lock the transmission felt a lot tighter than normal - as if the handbrake was on a bit. While this is not a sign of a seized viscous coupling unit it is certainly an indicator that it should be looked at. I prefer the wheel off the ground method so I thought I would take a few pics of the procedure which only takes about 5 minutes and put them here.
First - take one Freelander
Chock the wheels, particularly if you are on a slope like I am
Put the car in first gear and release the handbrake - and be careful (the handbrake is on the rear wheels and the handbrake has to be released to do the wheel test)
Jack up the drivers rear wheel until it is clear of the ground
Remove the hub cap
Then put a 1 1/4" or 32mm socket with a breaker bar onto the hub nut. Note the position of the breaker bar against the side of the car - marked with white tape.
Turn the wheel clockwise to take up the slack in the drive train - see breaker bar has moved to second white tape position.
Then apply a steady clockwise pressure to the wheel via the breaker bar - the wheel should slowly turn - if it does not then the VC is seized
In this case the VC is OK.
See this clip also
If you want to do the mark on the tail shaft test - here is where the marks go. Red arrow is the VCU - yellow marks are your aligned marks
Hope all this helps
Last edited by djhampson; 28th June 2009 at 05:23 PM.
The best demonstraton I have seen yet,I am sure it will help a lot of people
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garrycol (28th June 2009)
Great demo, many thanks. Hope you might be able to shed a little light. I have followed your test and have been able to turn the wheel as demonstrated, however when on lock my Freelander still feels tight as if it is getting bound up a little. When performing a full lock turn slowly I can hear the inner wheels scrubbing.
Do you have any ideas what this might be.
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LRT (9th May 2015)
Being very new to Freelanders I am on a very steep learning curve. Thanks for the headsup Garrycol. All the information I am gleaning from the Forum is going straight into the memory banks.
FYI for another side of the story
Hi Guys, Found this link to be an interesting read on the subject of VCU testing, I will be taking to my landy mechanic to find out how much truth is in the subject matter.
I Always challenge the reality I am presented with!!!!!
Symptoms - Bell Engineering
Last edited by rokdog74; 15th January 2013 at 10:11 AM. Reason: Spelling mistakes
Is the procedure the same for an automatic transmission vehicle?
There are people who spend all weekend cleaning the car.
And there are people who drive Discovery.
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