4WD!! - It's not handling a speed hump or my driveway!

[Nichster]

HI everyone - not familiar with my Landy yet; very much the novice :angel: - hoping you can help.
Going on uneven surfaces, side of the road, speed humps ... just when i'm getting to grips with my new vehicle; i hear a growlling noise (no smartyass comments now!). Everytime i go up my neighbours treacherous drive. What can this be?? Would really appreciate your opinions as I got the alarm thingy fixed with your tried & true strategies. Thanks, Nich:)

[Blknight.aus]

could be the Traction control kicking in.

[Nichster]

Good point, sounds plausible but don't think traction is always required in some of my mild incline circumstances. Does the traction control make that kind of noise?? Ta, Nich

[dmdigital]

If it is TC then the light should illuminate on the dash, though if it only very briefly comes on I remember it was sometimes to quick.

I remember there was one corner in town that turning left the TC used to always give a quick grumble and the light didn't come on. The Puma's TC doesn't bat an eyelid on the same corner, so it was something to do with the Disco's set up.

[trev]

It sounds like it is the TC cutting in.It is pretty sensitive and the cane toad noise is the shuttle valves operating as the wheel sensors detect changes in individual wheel speed.The TC light may not come on even briefly if the event is only short,just the noise.
At least you know it is working.

[Nichster]

It sounds like it is the TC cutting in.It is pretty sensitive and the cane toad noise is the shuttle valves operating as the wheel sensors detect changes in individual wheel speed.The TC light may not come on even briefly if the event is only short,just the noise.
At least you know it is working.

Thanks regards all the TC info - at least when i take it in tomorrow i will sound like i know what i am talking about. It will be interesting to see what they come up with. It is still under stat warranty so don't mind them checking it out. Cheers.

[imatt]

Hi Nichster,
You will find the noise is the TC, at first I was a little alarmed as it was the first vehicle I have driven with TC. It does seem to be quite sensitive, I find potholes and edges of roads, etc seem to activate it reguarly, but don't worry just learn to ignore it. If you have ever been for a drive in the latest 200 series Land Cruiser offroad then you will hear very similar sounds from its traction control. The system in the disco does work well offroad, so maybe take it for a spin and test out how well it copes with tough conditions, the noise might even be reassuring.
Cheers Matt:twobeers:

[ozscott]

TC - its quite loud. When it happens floor it and your will hear it working even more and the lights will come on aswell on the dash....assuming it is the TC its all very nice.



Cheers

[Basil135]

One other thing that it "may" be, is your tyres rubbing on the inside of the guards, or mudflaps.

You may find that as the suspension compresses, the tyre just rubs slightly. I get the same sort of cane toad noise as I go into my driveway with the new, slightly larger tyres.

[Redback]

TC - its quite loud. When it happens floor it and your will hear it working even more and the lights will come on aswell on the dash....assuming it is the TC its all very nice.



Cheers

Mate the D2 is super quiet compared to the Prado, first time I heard the TC in a mates Prado, I thought someone was bashing the car with a hammer:eek:

Baz.

[Nichster]

Hi to all helpful info providers - greatly appreciated.

Service centre indicated that there is a problem with the 'V...?? modulator; I think he said linked to TC & ABS. It needs replacing so now i have to wait until tomorrow to get it back. I'm happy for them to take their time to get it right as i have 2 weeks of holiday driving starting next week. I've obviously forgotten what 'V...' word he mentioned; i sound like an idiot. Does the service centre info sound about right?? :confused:

[2 rocks]

Shuttle Valve ??????
Mike

[Nichster]

Nope that wasn't mentioned 2 rock... maybe 'fancy' name for it or he didnt know I didnt know and made up a word. But sounds very similar to reply that mentioned pot holes and side road then noise. Good to know that noise is the TC though.

[Pedro_The_Swift]

good stuff if they are replacing the shuttle valves or the whole modulator:D

as for the growl,,
get someone in the front passenger with their feet on the firewall,,
The TC can be felt easily when activated.

[ozscott]

:D Didnt realise that about the Prados Baz...I remember when I first got the D2 in 02 and the TC went off when I went off road and I nearly jumped out of my skin. It was all so quiet apart from that!

Cheers

PS. Bet the Toyo boys would hate to hear that a Lexus production line Prado has a noisier anything than LR!

[imatt]

The service centre is probably talking about the ABS Modulator, which contains the shuttle valve switch pack. Apparently when there used to be a problem with the modulator it required the whole part to be replaced which costs a small fortune, but in most cases only the shuttle valve failed but could not be replaced individually. Then they supplied shuttle valve which meant you could repair the existing modulator without the great expense. But I would have thought if you had a faulty modulator/shuttle valve then you would have the classic three amigos warning lights. Is this service centre a Land Rover specialist?
Cheers Matt