Land Rover Long nose differential
- Defender 90 Front and Rear.
- Defender 110, 130 Front.
- Discovery 1 & 2 Front and Rear
- UNSUITABLE FOR 110,130 REAR
Here you can select your diffs requirements from standard OEM Rebuild to Modified specific.
All Diffs are built to the highest standard using the best quality components. All Diffs carry a 1 year Guarantee
If you are unsure which diff will suit your needs best. Drop an Email or call the workshop.
The casings we use are provided by Nigel Barker at Xcess 4x4. There are several reasons we use Nigel's casings. One being that no modification is required to the ATB or other diff centre. Unlike other pegged casings available where the centre requires 5mm or more turning down on a lathe. The quality of the welding and machining is second to none.
The Limited Slip operation differs from the Locking differential in that it is never 100% locked. It operates by applying torque to the wheel with traction when the other wheel looses grip.
The ATB gear type limited slip relies on the internal friction generated by gear sets within the diff centre, these gear sets are unsupported and designed to be ineffecient. In a normal situation, i.e. on road this diff will be totally transparent, you will not know it is fitted. Provided both wheels have grip no torque biasing takes place, on a bend or corner the faster outer wheel will try to bind up the internal gears but the inner slower wheel constantly unwinds the gears, so again on a corner no bias is felt. On low or no traction surfaces where one wheel has considerably less traction than the other and thus tends to spin, the gear action within the diff causes friction which in turn applies load to the wheel with traction. The amount of torque applied depends on what is termed the 'Bias ratio'. Bias ratios can be varied by different pre-loads and different gear profiles but the most common have a bias ratio of approx 2:1.
The advantage of a Limited Slip differential is that it is totally automatic, no driver interaction and retains drive to both wheels at all times.
The disadvantage of ATB is that if one wheel is totally off the ground ,i.e. no drive then the other wheel similarly because the bias ratio is still 2:1 i.e. 2 x nothing is still nothing. Attempts at changing the preload or left foot braking can then fool the ATB into working or better still if the vehicle is fitted with ATC (automatic traction control) the ATB will enhance the action.
4 PIN CENTRE
A standard 2 pin diff centre, as fitted to all Discoveries, Defender 90's and Defender 110/130 front diffs can be a weak point in the drive train as the single cross pin can either friction weld to one of the planet gears which then spins and wears the casing hole or they can just shear, either way the 2 pin stock diff will not take much off road abuse before failing. They also wear prematurly if the traction control is used excessivly ie in sand etc.
4 pin diff centres are machined from Billet EN24T and have the larger 18 mm diameter cross pins fitted. This means the 4 pin diff centre is much stronger and more reliable and not prone to the failure that the 2 pin diffs suffer with.
AIR LOCKING DIFFS
Created to provide 100% traction on demand, without sacrificing any of your vehicle's highway driving performance, Air Lockers employ a 12 volt air compressor designed to activate (and deactivate) a solid and durable locking mechanism inside the differential. This gives you the traction you need, when you need it, all at the flick of a switch, and all within the safety and comfort of the driver's seat.The advantage of the Air Locker lies in the pneumatically operated locking system inside the differential. When activated, the Air Locker prevents the differential gears from rotating and therefore prevents the axle shafts from turning independently of each other. With both wheels tied directly to the rotation of the crown wheel, the vehicle maintains maximum possible traction at all times. When unlocked, it operates just like a conventional ‘open' differential.In addition to providing outright improvements to a 4x4's off road capabilities, the Air Locker offers significant environmental benefits. An Air Locker equipped vehicle can be driven in a slower, safer and more controlled manner, greatly reducing the likelihood of vehicle damage and environmental impact.
The Detroit Truetrac was the first helical gear differential ever introduced into the automotive aftermarket as an Eaton brand. It remains the leading helical gear-type limited slip differential in the industry. Detroit Truetrac's proven helical gear design eliminates the need for wearable parts, resulting in maintenance free traction.
Recognised not only for its toughness but also it’s smooth and quiet operation. Engineered to work efficiently in front and rear axles, semi-floating (C-clip axles) and transfer cases. Power transfer is so smooth, it literally goes unnoticed by the driver - even in front wheel drive axles.