Haldex Test?

All,

I have my suspicions that the four wheel drive has packed up on the freelander 2. Apart from getting it bogged down in a muddy field does anyone know of a test or method to check if the haldex is working? I was pulling a trailer today with a bit of weight in it today and I noticed that only the front wheels were kicking in on the wet roads?

Any advice appreciated.

Geoff

Geoff Elliott said:

All,

I have my suspicions that the four wheel drive has packed up on the freelander 2. Apart from getting it bogged down in a muddy field does anyone know of a test or method to check if the haldex is working? I was pulling a trailer today with a bit of weight in it today and I noticed that only the front wheels were kicking in on the wet roads?

Any advice appreciated.

Geoff

Click to expand...

When you say "kicking in", do you mean skidding/spinning/slipping?

I don't know what F2 transmission options you have, but my mate has a slitty SUV and that has a knob for changing between 2WD (Haldex turned off), 4WD (Haldex in auto) and 4WD Lock (Haldex perm engaged). Presumably you have some fancy Terrain Response equivalent - do you have it in the appropriate setting?

Yes it was skidding / slipping / spinning - but only on the front wheels!

There's controls for changing from two to four wheel drive on the Freelander 2. It has terrain response so after the first attempt I changed it into the three other settings to see if that made any different but unfortunately it didn't.

FL2 terrain response has 4 settings. The different settings allow the FL2 to optimise the traction control. Fer eggsample certain conditions require less wheel spin, so it responds quicker to wheel spin to counter this by pulse braking the spinning wheel quicker than it normally would, etc.

From the FL2 owner manual:

General Program driving mode
This program is compatible with all on and off-road conditions. If not already active, it should be selected before driving on surfaces which are similar to a hard road surface. Dry cobbles, tarmac, dry wooden planks, etc., all fall into this category.
This program should be selected once the need for a special program has passed. Once the special program has been deselected, all of the vehicle's systems will return to their normal settings, except Hill Descent Control (HDC). HDC will remain active, if it was selected
manually.

Grass Gravel Snow
This program should be used where a firm surface is covered with loose or slippery material.
Note: For deep gravel, it is recommended that the Sand program is selected.
Note: If the vehicle is unable to gain traction in deep snow, switching Dynamic Stability Control (DSC) off may help. DSC should be switched on again, as soon as the difficulty is overcome.

Mud Ruts
This program should be used for crossing terrain that is muddy, rutted, soft, or uneven. Hill Descent Control (HDC) is automatically selected with this program.

Sand
This program should be used for terrain which is predominantly soft, dry sand or deep gravel.
Note: If the vehicle is unable to gain traction in extremely soft, dry sand, switching DSC off may help. DSC should be switched on again as soon as the difficulty is overcome. If the sand to be crossed is damp/wet, and sufficiently deep enough to cause the wheels to sink into the surface, the Mud-Ruts program should be used.

Freelander 2 terrain response:



I think it's against the law to be able to switch oft DSC on cars. I think when it's said to be switched oft, because yer pressed the oft button, what it actually does is desensitise it instead.

Think the haldex is knackered alright. Took it down the field yesterday and got rightly stuck - not a budge out of the rear wheels! Turning DSC off unfortunately didn't help either.

Unfortunately there isn't the depth of knowledge within the LZ community yet on F2 as there is with F1. There are some who are very knowledgeable on them but you have to reply on them being around. There's a lot of kit in them that simply isn't in F1 - eg the Haldex and Canbus etc. Complex stuff that you really need to know about to offer any advice - so us F1 guys are just going to stare blankly at you !

For example I haven't a clue how the Haldex works - I looked it up a couple of years ago - but can't remember - if they'd been around 40 years ago and I looked it up then, I might remember

There is a thread going at the moment about flushing Haldexes - that might help - you also might like to hijack the thread because it is getting quite a bit of input (but don't tell anyone I suggested that )

Have not worked on the system, but I understand it is used on Ford and Volvo vehicles.
There is a separate FL2 community on the web:
http://www.freel2.com/forum/
Might be able to get some help there, there is also a company called Bell engineering who seem to specialise in theses systems, might be able to help you or advise you how to test it.

Thanks for all your help guys. Geoff