Ashcroft Transmissions
Ashcroft diff lockers gears have been redesigned for maximum strength and durability.
Parts
Diff Locker (DA1224SN)
There are a multitude of different diffs available for your Land Rover - read about the different types of locking diffs
- A unique non-rotating annular piston locking actuator is designed to eliminate air leaks sometimes found with rotating seals.
- The annular piston is also designed to eliminate the oil blow back in the air exhaust line.
- The large piston area gives maximum hold-in force to reduce the possibility of jumping out of lock.
- Locking ring gives full 6mm positive engagement with side gear, again reducing the possibility of jumping out of lock.
- Gears have been redesigned for maximum strength and durability.
- The lock ring is made from high spec 300m steel to provide ultimate strength and ability to withstand shock loads.
- Locking actuator cage made from steel to withstand shock loading caused by power locking.
- Locker body turned from billet 817M40T (EN24T) to give optimum strength.
- Only change necessary to fit the locker is drill and tap the diff housing bsp for the air feed fitting.
- No changes to the axle case.
- Requires on board air supply - not supplied.
LT230 Cross Pin (DA1225)
The standard LT230 transfer boxes have a two piece cross pin in the centre diff, this is two shafts with a cut out in the centre so they can overlap. This Ashcroft Transmissions one piece heavy-duty cross pin is much stronger.
Diff Lock (DA1224)
There are a multitude of different diffs available for your Land Rover - read about the different types of locking diffs
- A unique non-rotating annular piston locking actuator is designed to eliminate air leaks sometimes found with rotating seals.
- The annular piston is also designed to eliminate the oil blow back in the air exhaust line.
- The large piston area give maximum hold-in force to reduce the possibility of jumping out of lock.
- Locking ring gives full 6mm positive engagement with side gear, again reducing the possibility of jumping out of lock.
- Gears have been redesigned for maximum strength and durability.
- Locking actuator cage made from steel to withstand shock loading caused by power locking.
- Locker body turned from billet 817M40T (EN24T) to give optimum strength.
- Only change necessary to fit the locker is drill and tap the diff housing 1/4” bsp for the air feed fitting.
- No changes to the axle case.
- Requires on board air supply - not supplied. (CKMA12 - ARB compressor assembly 12 volt)
Automatic Torque Biasing Limited Slip Differential (DA9011)
There are a multitude of different diffs available for your Land Rover - read about the different types of locking diffs
- Fully automatic - needs no driver input
- Totally transparent on road, i.e, no unwanted adverse effects
- Only comes into play when one wheel looses traction, i.e, a difference in wheel speed
- Enhances the traction control as it multiplies the bias load created by the braking effect of the traction control
- Needs no special oils
- Needs no adjustment as the gears compensate for any wear that takes place
- Only with 24 spline side gears
The automatic torque biasing limited slip differential is a ‘Helical Gear’ type LSD with six gear pockets.
There are a number of other LSD available including the ‘plate type’ and the Torsen T1, we believe the ATB is superior to the plate type LSD principally because of the high pre-load necessary to make the plate type effective, this high pre load leads to ‘harshness and vibration effects’ and causes high premature wear. The Torsen T1 was the forerunner ATB and relied on a different principle to generate cross torque, effectively using coupled worm and wheel gears, being driven backwards, to create the necessary friction loads. These often failed due to this high loading destroying the worm gears.
Note - Due to the nature of the ATB diff we do not recommend the vehicle is brake tested on rollers, ask for a decelerometer to be used instead.
Heavy-Duty Crown Wheel & Pinion (DA1207)
Under extreme conditions, the standard front diff tries to climb out of full engagement under full power, leading to stripped teeth. Ashcroft has cut the gears in reverse for the front in order to keep the gears fully engaged, a significant improvement over the original design. Ashcroft have also upgraded the material specification compared to the genuine Land Rover parts.
All pinions accept the later 24 spline drive flanges and have the female thread to accept the later type bolt (FS112301P) and washer (FTC5413). All ring gear threads are the stock 3/8 UNF, we stock the late flange head high tensile bolts for these (FTC5150).
Heavy-Duty Crown Wheel & Pinion (DA1508)
Under extreme conditions, the standard front diff tries to climb out of full engagement under full power, leading to stripped teeth. Ashcroft has cut the gears in reverse for the front in order to keep the gears fully engaged, a significant improvement over the original design. Ashcroft have also upgraded the material specification compared to the genuine Land Rover parts.
All pinions accept the later 24 spline drive flanges and have the female thread to accept the later type bolt (FS112301P) and washer (FTC5413). All ring gear threads are the stock 3/8 UNF, we stock the late flange head high tensile bolts for these (FTC5150). Ashcroft have chosen to coat the crown wheel and pinions in chemical black to aid corrosion resistance and offer a unique appearance.