Freelander 4 Wheel Drive
- 2 days ago Details about Land Rover Freelander 2.2 TD4 S - 4x4 - FSH - Diesel. CD Player, Premium Sound System: Manufacturer: Land Rover/Range Rover: Interior/Comfort Options. Four wheel drive. Full Service History. Full MOT until September 2021.
- I would like a pre-2001 reg to avoid the higher road tax charge. Don't mind manual or auto. Another question (might make me look stupid) but are all Freelanders 4 wheel drive and can they be switched between 2 and 4 wheel drive? Are the diesel models better? Which are the cheapest to insure?
SOURCE: connect four wheel drive for a freelander land rover 2005. The Freelander, along with all Land Rovers are permanently in 4 wheel drive: You need to take the car to a workshop to see what is happening. Freelanders have big problems with the transfer box, this maybe the problem.
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The benefits of 4WD
In slippery conditions, on or off-road, four driven wheels are always betterthan two.
With power being spread to all four wheels, 4WD effectively provides double thetraction and half the risk of wheel slip or spin, on or off-road
Freelander's 4WD System
Four Wheel Drive
- Car-like driving qualities on road, with a bias to the front wheels in normal tarmac driving conditions.
- An intelligent and automatic transfer of torque to the rear wheels to provide maximum traction when required.
Car-like feel, 4WD traction when required
In order to give car-like manoeuvrability and driving feel, most of the drive ischannelled to the front wheels in a normal tarmac straight-line mode.
If the vehicle is operating in slippy conditions and one of the front wheels starts tolose traction, the difference between the front and rear propshaft speeds is sensed by theViscous Coupling. The instant this happens, drive is progressively split as requiredbetween front and rear axles to maintain forward motion.
The Benefits
- Car-like driving qualities on-road.
- Good high speed stability.
- 4WD traction and handling off-road
- Lightweight.
- Reduced noise from transmission.
How it works.
The Freelander 1.8 petrol is fitted with the conventional 5-speed PG1 gearbox. TheFreelander does not have a separate transfer box splitting the power from front to rear.
Instead, it has an Intermediate Reduction Drive unit bolted onto the gearbox where theFinal Drive unit is located. This reduces the ratios by a factor of 1.458 to giverelatively lower gearing, and also rotates the drive through 90 degrees to the rear axle,via the Viscous Coupling. This gives the benefits of lighter weight and reducedtransmission noise.
The Intermediate Reduction Drive
The IRD incorporates a differential assembly, a primary and secondary helical spur geartrain, and a hypoid gear set. It replaces the traditional transfer unit and performs 3main tasks:
I R D
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Instead, it has an Intermediate Reduction Drive unit bolted onto the gearbox where theFinal Drive unit is located. This reduces the ratios by a factor of 1.458 to giverelatively lower gearing, and also rotates the drive through 90 degrees to the rear axle,via the Viscous Coupling. This gives the benefits of lighter weight and reducedtransmission noise.
The Intermediate Reduction Drive
The IRD incorporates a differential assembly, a primary and secondary helical spur geartrain, and a hypoid gear set. It replaces the traditional transfer unit and performs 3main tasks:
I R D
- Reduces the gear ratios of the manual gearbox by 1.458 to the front wheels via the helical spur gear train.
- Rotates the drive through 90 degrees to drive the propshaft and rear wheels via the hypoid gear set.
- In conjunction with the Viscous Coupling, gives the vehicle an automatically activated four wheel drive system without any extra levers.
The IRD is driven from the manual gearbox Final Drive carrier. Depending on the slip atthe front wheels, power is transmitted to the rear axle with torque split front/rear tosuit the prevailing driving conditions.
The Viscous Coupling Athentech perfectly clear essentials 3 6 3 1505 download free.
The concept of the Viscous Coupling Unit (VCU), introduced on Classic Range Rover, wasa world first for Land Rover. The VCU has been colloquially described as a 'tin oftreacle with discs in it'. It is a canister between the front and rear propshafts,filled with a silicone fluid sandwiched between steel plates. The fluid has thecharacteristic of increasing its viscosity when stirred and heated.
When the wheels on the front axle start to lose traction, they cause the front and rearpropshafts to rotate at different speeds to each other. This makes the discs in the VCUrotate at different speeds, which in turn causes a rise in temperature, progressivelylocking the discs together. This effectively starts to couple the front and rearpropshafts, eventually dividing torque equally between front and rear axles to maintaintraction and control. The response is almost instantaneous, and undetectable by thedriver.
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As the front wheels regain traction, the temperature in the VCU drops, the viscosity ofthe fluid returns to its original level, and the propshafts are unlocked, reverting tonormal drive mode.
Freelander 2 Parts
Through this ingenious system, the Freelander is able to give car like handling innormal conditions, and extremely good performance in adverse or off-road conditions,without the driver having to use additional controls.
There are almost as many different types of four-wheel-drive systems as there are four-wheel-drive vehicles. It seems that every manufacturer has several different schemes for providing power to all of the wheels. The language used by the different carmakers can sometimes be a little confusing, so before we get started explaining how they work, let's clear up some terminology:
- Four-wheel drive - Usually, when carmakers say that a car has four-wheel drive, they are referring to a part-time system. For reasons we'll explore later in this article, these systems are meant only for use in low-traction conditions, such as off-road or on snow or ice.
- All-wheel drive - These systems are sometimes called full-time four-wheel drive. All-wheel-drive systems are designed to function on all types of surfaces, both on- and off-road, and most of them cannot be switched off.
Freelander 2 4 Wheel Drive System Drive
Ezycal 1 800. Part-time and full-time four-wheel-drive systems can be evaluated using the same criteria. The best system will send exactly the right amount of torque to each wheel, which is the maximum torque that won't cause that tire to slip.
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In this article, we'll explain the fundamentals of four-wheel drive, starting with some background on traction, and look at the components that make up a four-wheel-drive system. Then we'll take a look at a couple of different systems, including the one found on the Hummer, manufactured for GM by AM General.
We need to know a little about torque, traction and wheel slip before we can understand the different four-wheel-drive systems found on cars.
