Land Rover Limited Slip Differential

High Performance Limited Slip Differential True Trac for Land Rover Defender.

The ATB or LSD Limited Slip Differential True Trac with helical gearing has many advantages that outweigh the objections to other designs, friction discs or planetary gears. Minimal preload is required to engage the gears. However, this does not cause excessive wear or harshness. Limited Slip Differentials with helical gears are practically noticeable to the driver during normal road use because there is no friction between the gear and the guide. It behaves like a normal open differential.

Function of Defender High Performance Limited Slip Differential

How does this LSD differential with 'helical gears' work? There are six sets of helical gears mounted parallel to the axle. Each of these 'sun gears' drives six helical gears, which mesh with six corresponding helical gears, into the opposite 'sun gear' that is in turn driving. The important factor is that these helical gears are mounted in 'guides' in the center carrier, so any radial load on the helical gears will cause them to push against the side of the pocket, creating friction. This is why we use six guides versus three from other manufacturers, more guides means more friction and a better limited slip function.

Comparison to 100% differential lock

One disadvantage of the Land Rover Limited Slp Differential is that there is always a load on one wheel per axle. If there is no load, such as a cross axle, the wheel with traction would only see about three times the load on the wheel without traction, ie nothing. To overcome this, as mentioned earlier, the ATB is equipped with some preload springs to provide a lateral load without traction in the case of a transverse axle when that preload does not provide sufficient traction on the other side. The favorite trick is to apply a small brake of the left foot while you apply more throttle. This maneuver fools the diff by putting a load on the non-traction side that is multiplied by the ATB (about 3: 1) to the other side. The loss of traction attributed to the brakes acting equally on both wheels is overcome by the braking system additional throttle. In a vehicle with automatic traction control, this braking is automatic and the ATB provides additional traction by multiplying the ATC effect. A 100% pneumatic differential lock on the other hand, allows 100% drive per wheel in difficult terrain, these cross locks increase the off-road capability many times over.

Mounting & General Info

The ATB diff can be mounted in the front or rear, in the rear you will not notice anything during normal road driving. In the front, the self-steering of the steering will be slightly higher than normal when you come out of a turn, but this is the case is very slight and will subside within the first few hundred miles, and you will automatically get used to this feeling. So why use an ATB instead of a differential lock? When riding on a surface with low traction e.g. sand, snow or wet grass, the Limited Slip Differential has a following advantage - A 100% locked differential has, at faster cornering a loss of traction greater loss of traction because both wheels are forced to travel at the same speed. One wheel normally breaks traction, allowing the entire drive the other wheel, which also breaks traction. The LSD differential allows for the difference in wheel speed, while also attempting to balance the torque at each wheel. This reduces the possibility of a spinning wheel.

Information

• Fits Defender 90 year 94 > 2016 front & rear axle.
• Defender 110 2003 > 2016
• Discovery 1 94 > 1998
• Range Rover Classic 1994 > 1998
• 24 spline shaft (spline