Land Rover ForumsLandrover Forum

Forum LZ Shop Gallery For Sale LZ - Live
Go Back   Land Rover Zone > Land Rover Talk > Land Rover Freelander
Register Search Today's Posts Mark Forums Read

Famous Four - Land Rover Freelander Parts Supplier

Land Rover Freelander Freelander fans, let's hear you. Forum Sponsored By: Famous Four - Land Rover Freelander Parts Supplier

Welcome to Land Rover Zone!

You are currently viewing our site as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, photos and use our for sale section. Registration is fast, simple and absolutely free so please, join our community today!



Reply
 
Thread Tools
  #1  
Old 11th-December-2012, 21:09
Crowbaglandyowner's Avatar
Member
 
Join Date: Nov 2012
Location: Wiltshire bulford
Posts: 74
Default Vcu testing

So I've looked at the vcu testing threads and I'm trying to tie down which is the best to apply? I've just done a few miles in the hippo on relative straightness, pulled over and physically felt the vcu and it was cold! From what I can make out this is a good thing. Is it? Is it a worth while test? Came back the same way 'off road' (mild easy crispy green lanes) and the same result! cold.

Another one to 'look' for so I've read, is to check the tyres for wear on every second tread, is this true/useful?

I've tried manually turning the props and it rotates slightly (maybe 2-3mm), is this normal?

All the tyres are the same make and size.

The rear viscous support bearing was replaced in September this year?

I can hear I little wine whilst driving (all gears and neutral) which I think is tyre noise as it gets more high pitched when on freshly laid road surface.

Freelander td4 05 plate 71000k.

All this in mind, do I have anything to worry about? Or do I get digging deep in the bottomless pit that is the pocket?

Cheers,

P.s I'm fairly inexperienced at all this so bare with me

Mike.
Reply With Quote
LZ
  #2  
Old 11th-December-2012, 21:11
Crowbaglandyowner's Avatar
Member
 
Join Date: Nov 2012
Location: Wiltshire bulford
Posts: 74
Default Re: Vcu testing

Quote:
Originally Posted by Crowbaglandyowner View Post
So I've looked at the vcu testing threads and I'm trying to tie down which is the best to apply? I've just done a few miles in the hippo on relative straightness, pulled over and physically felt the vcu and it was cold! From what I can make out this is a good thing. Is it? Is it a worth while test? Came back the same way 'off road' (mild easy crispy green lanes) and the same result! cold.

Another one to 'look' for so I've read, is to check the tyres for wear on every second tread, is this true/useful?

I've tried manually turning the props and it rotates slightly (maybe 2-3mm), is this normal?

All the tyres are the same make and size.

The rear viscous support bearing was replaced in September this year?

I can hear I little wine whilst driving (all gears and neutral) which I think is tyre noise as it gets more high pitched when on freshly laid road surface.

Freelander td4 05 plate 71000k.

All this in mind, do I have anything to worry about? Or do I get digging deep in the bottomless pit that is the pocket?

Cheers,

P.s I'm fairly inexperienced at all this so bare with me

Mike.
Ignore the ? On the viscous support bearing bit?
Reply With Quote
  #3  
Old 11th-December-2012, 21:11
jamesmartin's Avatar
Senior Member
 
Join Date: Dec 2010
Location: louth lincs
Posts: 53,396
Default Re: Vcu testing

its allways a good idea to check with 1 rear wheel up regulary you will get a feel for when it eventually stiffens
Reply With Quote
  #4  
Old 11th-December-2012, 21:13
Crowbaglandyowner's Avatar
Member
 
Join Date: Nov 2012
Location: Wiltshire bulford
Posts: 74
Default Re: Vcu testing

Quote:
Originally Posted by jamesmartin View Post
its allways a good idea to check with 1 rear wheel up regulary you will get a feel for when it eventually stiffens
Cheers pal, wasn't sure about that one as I heard mixed reviews.
Reply With Quote
  #5  
Old 11th-December-2012, 21:13
The Mad Hat Man's Avatar
Senior Member
 
Join Date: Sep 2005
Location: Embasinga stoc
Posts: 69,728
Send a message via MSN to The Mad Hat Man
Default Re: Vcu testing

Quote:
Originally Posted by Crowbaglandyowner View Post
So I've looked at the vcu testing threads and I'm trying to tie down which is the best to apply? I've just done a few miles in the hippo on relative straightness, pulled over and physically felt the vcu and it was cold! From what I can make out this is a good thing. Is it? NO! Is it a worth while test? YES Came back the same way 'off road' (mild easy crispy green lanes) and the same result! cold.

Another one to 'look' for so I've read, is to check the tyres for wear on every second tread, is this true/useful? IT HELPS

I've tried manually turning the props and it rotates slightly (maybe 2-3mm), is this normal? IMPOSSIBLE TO SAY

All the tyres are the same make and size. NEW ON BACK?

The rear viscous support bearing was replaced in September this year?

I can hear I little wine whilst driving (all gears and neutral) which I think is tyre noise as it gets more high pitched when on freshly laid road surface.

Freelander td4 05 plate 71000k.

All this in mind, do I have anything to worry about? ALWAYS Or do I get digging deep in the bottomless pit that is the pocket?

Cheers,

P.s I'm fairly inexperienced at all this so bare with me

Mike.

Do the test!
Reply With Quote
  #6  
Old 11th-December-2012, 21:17
Crowbaglandyowner's Avatar
Member
 
Join Date: Nov 2012
Location: Wiltshire bulford
Posts: 74
Default Re: Vcu testing

Quote:
Originally Posted by The Mad Hat Man View Post
Do the test!
Why isn'tit being cold a good thing?

Tyres look fairly new all round.

Do the test? The rear wheel one ?
Reply With Quote
  #7  
Old 11th-December-2012, 22:12
The Mad Hat Man's Avatar
Senior Member
 
Join Date: Sep 2005
Location: Embasinga stoc
Posts: 69,728
Send a message via MSN to The Mad Hat Man
Default Re: Vcu testing

Quote:
Originally Posted by Crowbaglandyowner View Post
Why isn'tit being cold a good thing? BECAUSE IT WORKS BY GETTING HOT!

Tyres look fairly new all round. THATS NOT WHAT I ASKED.

Do the test? The rear wheel one ? YES
Always fit new tyres on the back.
Reply With Quote
  #8  
Old 11th-December-2012, 23:03
Crowbaglandyowner's Avatar
Member
 
Join Date: Nov 2012
Location: Wiltshire bulford
Posts: 74
Default Re: Vcu testing

Quote:
Originally Posted by The Mad Hat Man View Post
Always fit new tyres on the back.
I was under the impression it only mainly got hot when under load? I.e loss of traction for example? Causing the fluid to go gel like and stiffen up transfering the drive to the rear wheels. Driving normally (even though in 4wd) predominately use 2wd right?

Forgive my ignorance, as I said, not very experienced
Reply With Quote
  #9  
Old 11th-December-2012, 23:26
The Mad Hat Man's Avatar
Senior Member
 
Join Date: Sep 2005
Location: Embasinga stoc
Posts: 69,728
Send a message via MSN to The Mad Hat Man
Default Re: Vcu testing

It appears that it gets warm in normal use.

Cold could mean it is seized.
Reply With Quote
  #10  
Old 12th-December-2012, 00:53
Hippo's Avatar
Lord Hippo
 
Join Date: Nov 2007
Posts: 11,837
Default Re: Vcu testing

Cold could mean it's open circuit too, like one of them useless vcu's which don't allow drive to the rear wheels.

Temp is a good general test as it gives an idea if the vcu is being over worked. More work means higher temp, until it reaches a certain temp when it's considered "seized". It's not actually seized in a bad way. It's just locked up as it's been pushed to activate due to differing prop shaft speeds (front to rear) or a spinning wheel like oft road. Locking up is a good thing, but not whilst driving on a tarmac road as this will potentially put more stress into the transmission.

I've never come across results for a cold vcu after a drive. If we keep testing then we’ll find out if cold vcu's do exist and they're not a problem. Try the One Wheel Up Test to confirm if your vcu is permanently seized or open circuit. Also tell us what speed you were driving at and the distance prior to the Turnip Test (measuring temp of vcu).

EDIT: Having said that mine felt cold at 8 degrees this morning but the air temp was -3 degrees. Usual short distance so it's not a concern for mine.

Last edited by Hippo; 12th-December-2012 at 23:56.
Reply With Quote
  #11  
Old 12th-December-2012, 07:57
Diesel Do's Avatar
Senior Member
 
Join Date: Apr 2012
Location: Nottingham
Posts: 4,481
Default

Stone cold means its doing nuffink! By design it will always do summfink, so should get warm, not hot, in general driving! You need to decide how cold or not it is?! The one wheel up test works well.
Reply With Quote
  #12  
Old 12th-December-2012, 12:24
Crowbaglandyowner's Avatar
Member
 
Join Date: Nov 2012
Location: Wiltshire bulford
Posts: 74
Default Re: Vcu testing

Quote:
Originally Posted by Hippo View Post
Cold could mean it's open circuit too, like one of them useless vcu's which don't allow drive to the rear wheels.

Temp is a good general test as it gives an idea if the vcu is being over worked. More work means higher temp, until it reaches a certain temp when it's considered "seized". It's not actually seized in a bad way. It's just locked up as it's been pushed to activate due to differing prop shaft speeds (front to rear) or a spinning wheel like oft road. Locking up is a good thing, but not whilst driving on a tarmac road as this will potentially put more stress into the transmission.

I've never come across results for a cold vcu after a drive. If we keep testing then well find out if cold vcu's do exist and they're not a problem. Try the One Wheel Up Test to confirm if your vcu is permanently seized or open circuit. Also tell us what speed you were driving at and the distance prior to the Turnip Test (measuring temp of vcu).
if i do the wheel test, it moves i take it that its a good thing? and if it doesnt move, bad thing? (seized)

was travelling between 40 and 50 mph.
Reply With Quote
  #13  
Old 12th-December-2012, 12:29
The Mad Hat Man's Avatar
Senior Member
 
Join Date: Sep 2005
Location: Embasinga stoc
Posts: 69,728
Send a message via MSN to The Mad Hat Man
Default Re: Vcu testing

Quote:
Originally Posted by Crowbaglandyowner View Post
if i do the wheel test, it moves i take it that its a good thing? and if it doesnt move, bad thing? (seized)

was travelling between 40 and 50 mph.

Not really
It just means you have, prospectively, a VCU with no drive.
Moving is better than not moving, but it is the rate of change which is the critical bit really.
Reply With Quote
  #14  
Old 12th-December-2012, 12:49
Crowbaglandyowner's Avatar
Member
 
Join Date: Nov 2012
Location: Wiltshire bulford
Posts: 74
Default Re: Vcu testing

Quote:
Originally Posted by The Mad Hat Man View Post
Not really
It just means you have, prospectively, a VCU with no drive.
Moving is better than not moving, but it is the rate of change which is the critical bit really.
ok think im getting the gist, is it the sort of thing that would be picked up on MOT/SERVICE if it wasnt running right?
Reply With Quote
  #15  
Old 12th-December-2012, 12:54
The Mad Hat Man's Avatar
Senior Member
 
Join Date: Sep 2005
Location: Embasinga stoc
Posts: 69,728
Send a message via MSN to The Mad Hat Man
Default Re: Vcu testing

no
Reply With Quote
  #16  
Old 12th-December-2012, 23:59
Hippo's Avatar
Lord Hippo
 
Join Date: Nov 2007
Posts: 11,837
Default Re: Vcu testing

Quote:
Originally Posted by Crowbaglandyowner View Post
if i do the wheel test, it moves i take it that its a good thing? and if it doesnt move, bad thing? (seized)

was travelling between 40 and 50 mph.
Movement v's length of bar and amount of weight on the end gives us a torque in newton meters, which could be used as a comparison. If loads of peeps tested theirs and put up results we could see what the average result is, and ponder (argue) over those that int. Perhaps draw a rule of thumb.

Edited me post above. My vcu felt cold this morning at 8 degrees but air temp was -3 degrees and I'd done my usual short drive so that dun't worry me on my hippo.
Reply With Quote
LZ
Reply

Thread Tools



All times are GMT +1. The time now is 14:09.


Page generated in 0.14323 seconds with 8 queries