Drive Train - Differentials

We carry a full line of ARB locking differentials, the first and most popular aftermarket locking differential for Land Rovers. The ARB is a fully selectable 100% diff lock. You get the benefit and versatility of normal differential action on tarmac and cab operated push button activation for diff lock - 100% instant traction. Compressed air actuates a piston inside the differential which engages a locking gear, instantly locking the differential. The ARB 4 pinion style carrier is twice as strong as the stock carrier adding the benefit of durability. For additional durability 1.25=94/24 spline rear axles are a very highly recommended upgrade for any Land Rovers with 10 spline rear axles, particularly in part time 4 wheel drive applications, i.e. Series l,ll,lll. We also exclusively carry the RD56B, which allows you to install stronger 24 spline rear axles in Series Land Rovers. We also carry heavy duty 24 spline rear axles for earlier Range Rovers with 10 spline axles.

APPLICATIONS - call for current pricing
RD 03 - 1971 - 93 Land Rover 3.54 gearing/10 spline axles
RD 03B - 1948 - 1984 Land Rover 4.7 gearing/10 spline axles
(includes conversion kit)
RD 56 - 1993 - 98 Land Rover 3.54 gearing/24 spline axles
RD 56B - 1948 - 1984 Land Rover 4.7 gearing/24 spline axles
(includes conversion kit)
RD 57 - 1995 to present Range Rover 4.0/4.6
RD 20 - Salisbury differential Defender 110 rear only/3.54 gearing
RD 32 - Salisbury differential Series lla, lll rear only/4.7 gearing


One of the original traction differentials and currently the most popular Rover traction diff in Europe. This Differential, recently released for Land Rover applications, is fully automatic. It can sense unintended wheel spin off road but is able to compensate for differences in turning radius on road. Since this differential doesn't have the added complication and cost of selectable controls - no compressors, air or vacuum lines and no electrical connections or relays - they are extremely reliable and cost effective - less expensive to buy, less expensive to install - a great value! You install them and forget about them - other than enjoying the additional traction now available. Detroit Lockers have traditionally been considered suitably only for hard core off roaders because they were noisy while cornering and they had a reputation for affecting the handling of the vehicle on road. This is no longer the case, they are available only in the newer style, referred to as soft lockers. These have nylon shims in the carrier which greatly reduce the noise generated. Also in a vehicle with full time four wheel drive and longer wheel bases, such as all late model Rovers, any handling variations are almost imperceptable. Some of the criticism of these diffs was undeserved, often times in their enthusiasm for additional traction people installed them in front differentials, which is very strongly discouraged. They are for rear diffs only - see next section for our favorite front diff. These diffs are in a 4 pinion design so they are much stronger than stock carriers. We highly recommend the installation of 24 spline axles in any Rover 10 spline application or at least an upgraded 10 spline axle, particularly any part time 4 wheel drive system i.e. Series ll and lll. We can also supply the conversion kit and axles necessary to install these in Series ll and lll Land Rovers.

APPLICATIONS REAR DIFFS ONLY - call for current pricing
187SL174A - 1971 - 93 Land Rover 3.54 gearing/10 spline axles
187SL174AC - 1948 - 1984 Land Rover 4.7 gearing/10 spline axles
(includes conversion kit)
187SL174A - 1993 - 98 Land Rover 24 spline axles
187SL174AC - 1948 - 1984 Land Rover 4.7 gearing/24 spline axles
(includes conversion kit)
225S36 - Land Rover Salisbury Differentials - Defender 110, some 109 models
* doesn't include conversion kits and axles


This is a gear driven limited slip differential. TruTrac limited slip differentials work by being able to sense differences in wheel spin and are able to compensate for this by biasing more torque to the wheel that has the most traction. They operate very smoothly, are completely automatic, have no adverse effect on handling and are very durable because they have no clutc hes or cones to wear out unlike traditional limited slip diffs. They are also very reliable and cost effective because they have no actuating mechanisms such as cables, air lines, compressors and electrical connections to malfunction. They can be installed in either the front or rear diffs, although we consider them ideal for the front diff for one huge reason - you can steer with them fully operating! They allow one wheel to rotate slightly faster than the other, allowing this diff to totally compensate for the different distances traveled by your tires even in a sharp turn. One major disadvantage of a fully locked front diff, whether fully selectable or automatic, is the inability to steer or the effort required to steer. Consider this - you are negotiating a very difficult and highly technical section of trail with a sharp turn somewhere in it. Your options are 1) try to remember to unlock your front diff at just the right time hoping that there isn't too much preload on your axle components and that your diff actually unlocks because if it does't it may require you to stop to do so. 2) the other option is to try to muscle your steering around as required. The problem with this option is that if you are not successful you need to stop, unlock your diff, backup slightly, steer, relock diff and proceed. Oftentimes, if the turn is not too sharp, you can successfully negotiate the turn but you will put a tremendous amount of stress on your front end components, particularly if you have power steering, hence risking the possibility of a catastophic failure of these components. Personally when I'm negotiating a very difficult and highly technical section of trail, I like to concentrate on picking and maintaining my line and using just the right amount of momentum to successfully negotiate the trail. A Trutrac allows you to concentrate on your driving!

The only minor disadvantage of a Trutrac is that when you are stopped with no forward momentum and the unit is not engaged, it can function as a conventional diff. This situation is easily rectified by briefly, lightly applying the brakes to "fool" the unit into thinking you are moving and it will engage. This situation is very uncommon, particularly when you have a fully locked rear diff and occurs only when you are fully stopped. Another thing you will notice with this unit is that your steering will feel slightly "heavier", although only slightly. If you aren't used to the vehicle you probably wouldn't notice it. Note: This only app lies to vehicles without power steering! These minor disadvantages are more than offset by the many advantages of this unit and as a result this is'nt diff of choice. This diff also makes a great rear diff if your four wheelng doesn't run to the extreme. If you prefer off roading that stops short of the extreme but would like the benefits of a traction diff, TruTracs make a great rear diff also - effective, smooth operating, inexpensive and easy to install. TruTracs are a 4 pinion design and as a result have the benefit of being much more durable than a stock diff carrier.We can also supply the conversion kit to allow these to be used in Series l. ll and lll Land Rovers.

APPLICATIONS - Front and Rear Diffs - Prices start at $459*
910A416
 front axle		 - 1971 - 93 Land Rover 3.54 gearing/10 spline axles
912A400
rear axle
910A416C
front axle		 - 1984 Land Rover 4.7 gearing/10 spline axles (includes conversion kit)
912A400C
 rear axle
912A407
front axle		 - 1993 - 98 Land Rover 24 spline axles
912A383
rear axle
912A407C
 front axle		 - 1984 Land Rover 4.7 gearing/24 spline axles (includes conversion kit)
912A383C
rear axle		 - * doesn't include conversion kit


GBR HYPOID DIFFS - logo
We currently are developing a full hypoid differential of our own specifications, we hope to release this product later in 1999 - keep checking for updates.

GBR MANUAL DIFF LOCKS - Series ll,lll

A hub operated fully locking rear differential manufactured to our specifications in Austrailia. Designed for the Rover owner who would like the confidence of having a diff lock available in a pinch, but doesn't need or want the extra expense of cab operated controls. This diff lock is extremely strong, it eliminates all of the weak points of Rover diffs and axles. It is ideal for Series Land Rovers which suffer from the 10 spline axle fatigue problem. They are very simple and extremely reliable. These kits are the strongest, most reliable and best value in selctable locking diffs for Series Rovers that are available. They can also be special ordered for Salisbury Differentials.

Kit includes:
(1) - 4 pinion locking carrier
(2) - upgraded heavy duty 1.25"/24 spline salisbury style axles manufactured from EN 25 steel
(1) - locking hub,
(1) - specially hardened 24 spline drive flange.
(2) - conversion carrier

picture - PRICE $950

GBR HEAVY DUTY 4 PINION DIFFERENTIAL CARRIERS

Most U.S. specification Land Rovers both early and late models, come factory equipped with 2 pinion differential carriers. If you would like a substantial increase in durability but don't want or need a traction diff, your factory diff carrier can be replaced with a much stronger 4 pinion design. The difference is 1 pair of spider gears vs 2 pair of spider gears and a fully enclosed and much stiffer carrier design. These carriers also have a larger carrier bearing jounal size. Oftentimes when you experience a ring and pinion gear failure the cause is the stock 2 pinion carrier flexing or cracking resulting in the misalignment of ring and pinion gears and instant failure. Available for both early and later style Land Rover differentials in both 10 and 24 spline configurations, although if you are adding the additional durability of a 4 pinion carrier we highly recommend adding the durability of 24 spline axles. We can supply these as a complete kit. This kit is a cost effective option to get Salisbury axle and diff strength without the disadvantages of, loss of ground clearance, increased driveline angles and the expense of replacing your drive shaft.

HEAVY DUTY 4 PINION DIFFERENTIAL CARRIERS
for 10 spline axles   GBRFP10S $389
for 24 spline axles   GBRFP24S $389
Kit includes:
(1) 24 spline carrier (2) 24 spline axles (2) Hardened 24 spline drive flanges 		  GBRFP24K call


KAM Cable Locking Differential
This is a cab operated diff ock utilizing locking tube technology to acheve 100% positive diff lock. Locking tube technology has been used & proven for several decades by Toyota Land Cruiser, Mercedes Benz Unimog and heavy duty agricultural and industrial equipment of various makes. The locking tube axle is activated via a cable connected to toggle lever mounted in the vehicle cab. This is a very reliable design that eliminates electrical & pneumatic malfunctions. Kit comes complete with 1.25/24 spline axles and drive flanges, locking tube, locking carrier, carrier bearings, actuator and all necesary hardware. Available for Series ll, lll, all Range Rover, Discovery and Defender Models. KAM Limited Slip Differentials A true 4 pinion design that utilizes 18 friction clutches that are activated by different wheel speeds. The advantage of this configuration is that the diff behaves as a normal open diff giving no drag under normal driving conditions, however as soon as differerent wheel speeds are detected the diff provides the traction needed, smoothly and in a controlled manner with no sudden changes in the vehicles behavior characteristics. For use in rear diffs only. KAM Limited Slip/Locker Combination The KAM positraction carrier combined with KAM's locking tube differential. When you require extra traction pull the toggle lever to instantly achieve full diff lock.

SPECIAL ORDER ONLY CALL FOR PRICING


MAXI-DRIVE LOCKABLE DIFFERENTIALS
This is a cab operated diff lock utilizing locking tube technology to acheve 100% positive diff lock. Locking tube technology has been used & proven for several decades by Toyota Land Cruiser, Mercedes Benz Unimog and heavy duty agricultural and industrial equipment of various makes. The locking tube axle is activated via engine vacuum This is a very reliable design that eliminates electrical & pneumatic malfunctions. Kit comes complete with 1.25/24 spline axles and drive flanges, locking tube, locking carrier, carrier bearings, actuator and all necesary hardware. Available for Series ll, lll, all Range Rover, Discovery and Defender Models.

picture

SPECIAL ORDER ONLY CALL FOR PRICING


MCNAMARA HYPOID VACUUM LOCKERS


Jack McNamara Differentials (JMD) is an Australian company which specializes in designing, manufacturing and rebuilding differentials with a special emphasis on coping with the extremely harsh off road conditions common in Australia. JMD manufactures a full hypoid conversion differential for Land Rover products. They are by far the strongest replacement differential currently available. They are estimated to be 2 1/2 to 3 times stronger than a standard Rover differential. When supplied with McNamara's own vacuum locking carrier they are extremely reliable. The locking mechanism is operated by engine vacuum, as a result there are no electrical relays or air compressors to malfunction. Installation time is substantialy less compared to some replacement differentials because they are supplied completely set up and assembled.They normally come supplied with 3.54 or 4.70 gear ratios although a wide range of ratios can be special ordered, including 3.42, 3.73, 3.90, 4.10, 4.30, 4.56, 4.85, 5.29 and 5.71. You also have a choice of carriers other than McNamara Vacuum Lockers, including ARBs, Detroit Lockers and Trutracs or conventional non-locking open diffs.

SPECIAL ORDER ONLY CALL FOR PRICING


MCNAMARA SALISBURY VACUUM LOCKERS
The reliability of JMD Vacuum Locker is also available for the Land Rover Salisbury differential which came supplied as the rear diff on later 109s,and all 110s. The Land Rover Salisbury differential is a hypoid diff and does not suffer from durability problems of the Rover diff but you can add the reliability of vacuum locking capability. This kit comes with a replacement rear cover plate which contains the locking mechanism, the locking carrier , vacuum lines and water trap.

SPECIAL ORDER ONLY CALL FOR PRICING