Strange noise?
#1
05-23-2006 | 11:00 AM
Thread Starter
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Overlanding
Joined: May 2006
Posts: 22
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#4
05-23-2006 | 10:35 PM
Administrator
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From: Denver, Colorado
RE: Strange noise?
ORIGINAL: Disco Mike
What year, model and mileage?????????????????
Can you give us a closer idea the general area of the noise, was it continous or maybe only when turning?
Mike
What year, model and mileage?????????????????
Can you give us a closer idea the general area of the noise, was it continous or maybe only when turning?
Mike
Where did you go, are you still needing help??
Landzu,
A D2 case will whine up into the upper speed range, especially when slowing down, pretty common.
I am still curious to get more info, cause if he is hearing it when wheeling, odds are there is something else going on.
Mike
#5
05-23-2006 | 11:02 PM
Thread Starter
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Overlanding
Joined: May 2006
Posts: 22
Likes: 0
RE: Strange noise?
Disco Series 2 2000 with 75,000 miles, i had it in third gear and i was going slow and it seemed to be when i was turning like the abs was trying to do something and the noise was in the front end it only happens when i turn on dirt mud etc not on the road. thanks again for all the replys.
Durf the Newbie
Durf the Newbie
#7
05-24-2006 | 05:00 AM
2nd Gear
Joined: May 2006
Posts: 2
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From: Johannesburg, South Africa
RE: Strange noise?
ORIGINAL: Disco Mike
Do you have ACE?
Mike
Do you have ACE?
Mike
This from the Ford Site
ACTIVE CORNERING ENHANCEMENT
Myth: The suspension systems SUVs employ aren't very sophisticated.
Reality: Discovery Series II's optional Active Cornering Enhancement system is an award-winning active anti-sway bar system that is exclusive to Land Rover.
Two of Land Rover's initial goals for Discovery Series II were reduced vehicle body lean on-road and plenty of axle articulation off-road. These goals at first seem to be mutually exclusive. But Active Cornering Enhancement (ACE) achieves both objectives. ACE is a unique Discovery Series II option that measures vehicle speed and lateral "g" acceleration and automatically adjusts special two-piece roll-control modules during cornering. The roll-control modules replace conventional anti-sway bars.
Anti-sway bars are designed to limit body lean in curves by restricting the overall movement of suspension components. Making the anti-sway bars too thick increases the harshness of the ride over bumps and limits the ability of the axles to articulate-travel in opposite tilt relative to each other and the vehicle. On ACE-equipped vehicles, two accelerometers-one mounted in the vehicle's headliner and the other near the floor-detect cornering forces before the body begins to lean, making the system truly active, not reactive. These sensors instruct the ACE computer to apply hydraulic pressure to a set of actuators, one on each anti-sway bar. These actuators-basically hydraulic cylinders with multiple links-apply torque to the anti-sway bars, giving them added ability to counteract vehicle body lean. It all happens in a flash. ACE can build up sufficient hydraulic pressure to counteract 1.0 g of lateral acceleration in less than 130 milliseconds.
The system is designed to virtually eliminate body lean up to about 0.4 g of lateral acceleration. Above that value, the system progressively allows more body lean to give the driver positive feedback on the vehicle's handling. This results in dramatic stability in corners, a definite benefit to driver control and passenger comfort. It also aids steering response since it keeps the vehicle's body more level to the road. And unlike conventional anti-sway bars, ACE does not affect spring rates over bumps. ACE is even sophisticated enough to vary its action depending on whether the road is rough or smooth.
Off-road, the system goes into a different mode. At speeds below about 25 mph in low range, when the accelerometers determine the vehicle is driving off pavement, the system eliminates ACE assistance, allowing the suspension to offer additional wheel travel (as if the anti-sway bars had been eliminated.) This additional wheel travel helps the vehicle's body maintain a consistent attitude, parallel to the ground.
Myth: The suspension systems SUVs employ aren't very sophisticated.
Reality: Discovery Series II's optional Active Cornering Enhancement system is an award-winning active anti-sway bar system that is exclusive to Land Rover.
Two of Land Rover's initial goals for Discovery Series II were reduced vehicle body lean on-road and plenty of axle articulation off-road. These goals at first seem to be mutually exclusive. But Active Cornering Enhancement (ACE) achieves both objectives. ACE is a unique Discovery Series II option that measures vehicle speed and lateral "g" acceleration and automatically adjusts special two-piece roll-control modules during cornering. The roll-control modules replace conventional anti-sway bars.
Anti-sway bars are designed to limit body lean in curves by restricting the overall movement of suspension components. Making the anti-sway bars too thick increases the harshness of the ride over bumps and limits the ability of the axles to articulate-travel in opposite tilt relative to each other and the vehicle. On ACE-equipped vehicles, two accelerometers-one mounted in the vehicle's headliner and the other near the floor-detect cornering forces before the body begins to lean, making the system truly active, not reactive. These sensors instruct the ACE computer to apply hydraulic pressure to a set of actuators, one on each anti-sway bar. These actuators-basically hydraulic cylinders with multiple links-apply torque to the anti-sway bars, giving them added ability to counteract vehicle body lean. It all happens in a flash. ACE can build up sufficient hydraulic pressure to counteract 1.0 g of lateral acceleration in less than 130 milliseconds.
The system is designed to virtually eliminate body lean up to about 0.4 g of lateral acceleration. Above that value, the system progressively allows more body lean to give the driver positive feedback on the vehicle's handling. This results in dramatic stability in corners, a definite benefit to driver control and passenger comfort. It also aids steering response since it keeps the vehicle's body more level to the road. And unlike conventional anti-sway bars, ACE does not affect spring rates over bumps. ACE is even sophisticated enough to vary its action depending on whether the road is rough or smooth.
Off-road, the system goes into a different mode. At speeds below about 25 mph in low range, when the accelerometers determine the vehicle is driving off pavement, the system eliminates ACE assistance, allowing the suspension to offer additional wheel travel (as if the anti-sway bars had been eliminated.) This additional wheel travel helps the vehicle's body maintain a consistent attitude, parallel to the ground.
Cheers
#8
05-24-2006 | 12:05 PM
Administrator
Joined: Apr 2006
Posts: 25,707
Likes: 105
From: Denver, Colorado
RE: Strange noise?
So have you never driven over 25MPH off the road, doesn't take much to get there and believe me it will make some noise when working, especially when it hasn't been serviced in the past 15,000 miles. Rover's with ACE are know for making pump noise especially with burned fluids.
So, yes, it could be the ACE as well as many other parts on the truck, you need to start somewhere to find and illiminate noises.
Mike
So, yes, it could be the ACE as well as many other parts on the truck, you need to start somewhere to find and illiminate noises.
Mike
#9
05-24-2006 | 01:07 PM
Mudding
Joined: Apr 2006
Posts: 102
Likes: 0
From:
#10
05-24-2006 | 02:38 PM
Administrator
Joined: Apr 2006
Posts: 25,707
Likes: 105
From: Denver, Colorado
RE: Strange noise?
ORIGINAL: Elhoff
When off road in my 99 D2, I have occasionally experienced a whining noise coming from one wheel or another. Just for a couple seconds at a time. I always assumed it was the traction control system applying the brakes on one wheel.
Elliot
When off road in my 99 D2, I have occasionally experienced a whining noise coming from one wheel or another. Just for a couple seconds at a time. I always assumed it was the traction control system applying the brakes on one wheel.
Elliot
mike