Fivespddisco
Supporting Sponsor
Very interesting indeed.
Overland Journal Project Land Rover Discovery 4 (LR4)
- Thread starter Scott Brady
- Start date
LR Max
Local Oaf
I've seen factory rear diffs with lockers available for reasonable prices. Been wondering if getting one of those and hard wiring is the way to go.
Also quick question in regards to the ARB air compressor, wouldn't you just tie into the on board air system anyway? No sense in having two air systems.
Also quick question in regards to the ARB air compressor, wouldn't you just tie into the on board air system anyway? No sense in having two air systems.
Don't people do that with G-wagens and Toyotas though? Replace the factory lockers with ARB air lockers? Obviously not doubting you, as you know far more about the platform than I do, but I'm wondering what happens if the factory locker fails. Pay $3600 for a new diff or switch to the ARB setup for around $1200?
I *believe*, based on pictures, the HD and non-HD housings and center carriers are different. To replace a rear diff on an HD truck you would need to source a non-HD rear diff as a core for the ARB to go into. at least that's how the units look from pictures.....
As far as the electronics go, you should be able to simply reflash the transmission, traction control, and/or transfer case computers to a non-HD equipped version of the software using a Faultmate (or promised future version of the IIDtool). Folks have ADDED the OEM HD rear locker to non-HD trucks by simply bolting the parts in place, adding the bits of wiring, and reflashing the computers to the proper software. There should be no reason the reverse won't work.
As far as the electronics go, you should be able to simply reflash the transmission, traction control, and/or transfer case computers to a non-HD equipped version of the software using a Faultmate (or promised future version of the IIDtool). Folks have ADDED the OEM HD rear locker to non-HD trucks by simply bolting the parts in place, adding the bits of wiring, and reflashing the computers to the proper software. There should be no reason the reverse won't work.
Scott Brady
Founder
Air Lockers are not available for the G-Class. It has been done a few times with Toyotas and Jeeps, but mostly when a hardware upgrade is associated (like a larger axle, etc).
leadoverdistance
Observer
You know that LR3 you have been threatening to build............ ;-)
proper4wd
Expedition Leader
I will reserve judgement and say that there may still be an issue with the vehicle dynamics computers in certain situations.
If the steering angle sensor determines that the front wheels are turned, and the vehicle is moving forward based on the wheel speed inputs, but all the wheels are turning at the same rate, it could determine this to be a skid scenario and DSC may try to intervene by cutting engine power.
Not saying this will definitely be the case, but it is within the realm of logic for the DSC system.
The more interesting test will be that of the driveline components, especially all 8 CV joints.
If the steering angle sensor determines that the front wheels are turned, and the vehicle is moving forward based on the wheel speed inputs, but all the wheels are turning at the same rate, it could determine this to be a skid scenario and DSC may try to intervene by cutting engine power.
Not saying this will definitely be the case, but it is within the realm of logic for the DSC system.
The more interesting test will be that of the driveline components, especially all 8 CV joints.
Fivespddisco
Supporting Sponsor
It is not a threat. It is a reality. Right now we are working on reinventing the wheel ...............hint hint
Fivespddisco
Supporting Sponsor
I believe the locker trucks have larger CVs. I know for sure there's a different part number
Jwestpro
Explorer
The computer would likely not be too happy with you using it's air supply but most people who are going to install the ARB lockers will also be happy to have a separate on demand air supply for tires. I love having my air compressor and tank supply for going offroad but also for seating a tubeless mountain bike tire. My new arb compressor is under the hood now with gauge and outlet supplying a tank under the passenger sill similar to how the suspension tank is under the left/driver side (NAS).
Jwestpro
Explorer
Very exciting indeed! Thanks for sharing.
I'm too far into this LR3 to consider the LR4 (recently increased the tire clearance at all 4 tight spots) but am hopeful for a diesel/hybrid model to come here someday.
SteveMfr
Supporting Sponsor
The EAS ECU should not notice the small amount of air the lockers use. The only way the ECU monitors this is time to fill the air tank. When a compressor becomes worn and takes too long to reach shut off pressure, a fault is thrown.
Pumping up tires that have been aired down using the EAS air supply is an altogether different question (I've seen this suggested numerous times). This is guaranteed to cause problems. Even if no fault codes are thrown due to the compressor running forever, there is a large potential for causing problems with the EAS air drier. The air drawn into the system is dried by being passed through a desiccant which should be dried again by air being expelled through it. If all that air leaves to fill tires, the drier will quit functioning rather quickly.
If you carry a portable compressor for filling tires, I'd see no great probs in using the EAS to operate the lockers. But going the way Jwestpro suggests is a good option - and even safer because it eliminates a potential source of problems for the EAS if there is a prob with the lockers/air lines/etc.
Jwestpro
Explorer
even better would be a way to bypass/substitute the arb air incase the oem compressor stops functioning however the system has a lot of computer talking going on so my shop didn't want to waste my $ trying to figure it out.
I'm just excited as heck about the lockers though. Maybe by the time a diesel-hybrid is available I'll have my LR3 set up perfectly
I'm just excited as heck about the lockers though. Maybe by the time a diesel-hybrid is available I'll have my LR3 set up perfectly
SteveMfr
Supporting Sponsor
That is the one thing I did way back on my P38 when I first started playing with air suspensions (unwillingly at the time ) ): I added a valve between the compressor and the air inlet solenoid (valve block on the P38) to allow me to fill the EAS with an external air supply.
I am not a fan of those manual 'add air' kits that have separate valves for each spring: you add a number of additional junctions in the airlines + 4 additional valves. All you need is air in the system and the solenoid-valves can be jumpered to inflate each corner to where you want it.
But tbh I have never needed to add air. Compressors die slowly, not catastrophically.
) ): I added a valve between the compressor and the air inlet solenoid (valve block on the P38) to allow me to fill the EAS with an external air supply. I am not a fan of those manual 'add air' kits that have separate valves for each spring: you add a number of additional junctions in the airlines + 4 additional valves. All you need is air in the system and the solenoid-valves can be jumpered to inflate each corner to where you want it.
But tbh I have never needed to add air. Compressors die slowly, not catastrophically.
