I am getting surges of vibration or shuddering felt through the car body at speeds of 60-70 mph on straight smooth roads. Not really noticeable at lower speeds. The surges occur every half mile or so and feel like going over rumble strips or maybe axle wind-up. Other times it feels smooth. I have 2 x Brand new Scorpion Zeros (each @ 8mm) fitted to the front and 2 x Accelera Iotas (each @ 6.5mm) fitted to the back. The new tyres on the front were fitted as the first attempt to fix the problem. (previous front tyres were 6mm and 4mm). Suspecting a Haldex fault I selected GGS for a few miles but there was no change apart from reduced throttle response.
Any ideas out there? ....and how can I "prove" the Haldex?
Bob 10MY (Sept 09) TD4 HSE Auto in Stornoway Grey (Now Gone)

08 FL2 TD4 SE Manual in Rimini Red (Now Gone)

Last edited by dunkley201 on 12th Apr 2014 7:37 am. Edited 1 time in total

Quote:

how can I "prove" the Haldex?

Since the initial post I have spoken to Adam Roberts at Duckworths. He identified fuse FB6 in the rear fusebox. I pulled it and did a test drive - with "Traction Control Fault" flagged on start up and permanent flashing amber warning light. A drive down the A46 dual carriageway was as smooth as silk. I pulled in to a layby and refitted the fuse. Within half a mile the fault was back. Haldex fault! Apparently the Haldex self tests at regular intervals whilst driving. With mine it looks like it is being a bit over zealous and giving me vibes every half mile (or about 30 seconds).

pab, thanks for your input. I am familiar with the tight turns test and used that before buying the car. However it passes that test now. It seems the Haldex is working, but being lazy in its self test, thus giving symptoms of a lock up.

Bob 10MY (Sept 09) TD4 HSE Auto in Stornoway Grey (Now Gone)

08 FL2 TD4 SE Manual in Rimini Red (Now Gone)

Update: Now fixed! After several checks, the Haldex software was updated to that called for after a diff pinion repair. Diff was fine apparently. Drives smoothly now. Thank you Adam Roberts at Duckworths! All work paid for by LR extended warranty  10MY (Sept 09) TD4 HSE Auto in Stornoway Grey (Now Gone)

08 FL2 TD4 SE Manual in Rimini Red (Now Gone)

Dunkly, interesting fault you had there.
would the fault that I have sound to be the same to you?
It feels like clutch judder, if it was a manual and as you say its like running over sleeping policemen. Happens on straight roads and at odd occasions, not regular but often.

Mick P, the key thing on the fault I had was the regular vibrations every half mile/30 secs or so at about 60 mph on a straight road. On country roads with bends and slower speeds it disappeared. It clearly was amplifying the differences in rotations between the 8mm tread depth front tyres and the 6.5 mm rear tyres, but only at speed in a straight line. I was lucky as I had a spare winter set of 17's which were all the same wear rate. When they were fitted, the fault disappeared, proving it was the difference between front and rear tyres on the 18's showing the problem.

With yours, the first thing I would to do is check the tyres - are they all the same pressures, type and wear rate? If there are differences, try swapping them around (ie, front to rear maybe). Take a good look at the tyres when you swap them - make sure there are no unseen irregularities or damage. See if the fault moves/changes. Have a good look at the drive shafts when you have the wheels off too. Could be signs of a CV joint worn. Failing that, get a fault read check done, maybe something is recorded. (Mine had a historical front/rear rotations out of limits logged)

Bob 10MY (Sept 09) TD4 HSE Auto in Stornoway Grey (Now Gone)

08 FL2 TD4 SE Manual in Rimini Red (Now Gone)

Dunkly, many thanks for the in depth info, much appreciated. Interesting about tyre sizes. I knew this was an important consideration on FL1 but thought it irradicated on FL2. Will DEFO check it out.
Have another issue to sort first, management light on. Took it to a wurthy LR delealer who said it was a sticking turbo actuator, they freed and greased the offending item, cleared the fault code and all was well with that issue for a couple of days. Now it's back on again. I'm having Graham Bell Landrover, of Queensferry, to take a look at it next week.
Will keep you updated for interest.
Thanks again.

Mick, thanks for getting back. Re tyre size issues - you are right, in general it has been eradicated on the FL2. It was just that on mine the Haldex ECU self test (apparently about every 30 secs) was making the Haldex clutches "grab" for a fraction too long which gave the vibration because the F to R tyre rotations were slightly different. Once the software was sorted the problem disappeared.

Good luck with the management light - my guess it is not the turbo at all but a sensor fault. All too often nowadays it is "the hammer that's cracked, not the wheel! You just need to prove it!

Bob 10MY (Sept 09) TD4 HSE Auto in Stornoway Grey (Now Gone)

08 FL2 TD4 SE Manual in Rimini Red (Now Gone)

Can I butt in on this one? Seen loads of posts about driving slowly in a circle and you'll "know" there's a problem - I have no idea what Id be looking for. Should you let the car pull itself in 1st, 2nd, gas/no gas? What symptoms would a problem exibit?

Thanks and sorry for the intrusion  FL2 TD4 GS 60 reg Facelift - so many issues
2019 DS. Terribly unreliable.
Sold DS for a 2021 Mitsubishi Outlander PHEV. Fingers crossed....
Sold Outlander for a 2014 SD4 SE Tech because I’m mental
Now greatly regret selling the Outlander. MPG of the FL2 is atrocious and so are the fuel bills. Fun though 😎
Couldn’t afford the fuel bills so back to an older Mitsubishi Outlander PHEV. Significantly better than I remembered it to be…

I have never experienced the fault that is supposed to be revealed by the full-lock test. I assume the rear axle tyres will scrub as they fight for position with what would be a locked-up differential. Try it in various TR settings. I understand the Haldex (which is essentially a front to rear diff) should be engaged when GGS, M&R or Sand is selected. If I am wrong, I am sure someone with better knowledge will be along shortly!

Bob 10MY (Sept 09) TD4 HSE Auto in Stornoway Grey (Now Gone)

08 FL2 TD4 SE Manual in Rimini Red (Now Gone)

Thanks Bob. FL2 TD4 GS 60 reg Facelift - so many issues
2019 DS. Terribly unreliable.
Sold DS for a 2021 Mitsubishi Outlander PHEV. Fingers crossed....
Sold Outlander for a 2014 SD4 SE Tech because I’m mental
Now greatly regret selling the Outlander. MPG of the FL2 is atrocious and so are the fuel bills. Fun though 😎
Couldn’t afford the fuel bills so back to an older Mitsubishi Outlander PHEV. Significantly better than I remembered it to be…

I'm assuming that this is to test whether the haldex is acting as a diff or has locked up. If it's locked up, you ought to get transmission "wind-up" and the steering will become stiff as the wheels rotate at different speeds or travel different distances - you might even get a judder as the tyres scuff.
Did this once on a military 4-tonner: forgot to take it out of 4WD when back on the road, and within half a mile the steering became too stiff to operate. I had to bounce a wheel off the kerb (with a bunch of cadets in the back, oops) to free everything up. Ex AA Series III LWB Safari - Gone
300TDi Disco (bought new - terrible car) sent back after 18 months
Freelander 1 Estate - leased, given back at end of lease
200TDi Disco (bought from a mate with 100,000 on the clock) - Gone
Disco 2 TD5 - sold and exported to France
FR2 TD4 GS - Gone
FR2 SD4 HSE - Now changed for a DS
New model ex-demo Evoque S 180 in white
Unable to order a new DS, so gave up. Now have a Volvo S90 Recharge.