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Disco 2 Great Truck No Diff Lock...

Discussion in 'Land Rover Discovery' started by iain Carr, Aug 31, 2019.

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  1. Turboman

    Turboman Rural Activist

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    I mentioned that it might exist, because I remembered that some modern vehicles have it.
    I also suggested he look it up, because I was only suggesting it as a possibility.
    Which he did.
     
  2. Turboman

    Turboman Rural Activist

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    [QUOTE="Michalis Karatzis, post: 4648460, member: 143022"]I'm not saying that the TC is perfect (or better than a CDL), [/QUOTE]

    Traction Control isn't really comparable to centre diff lock.

    It is sort of an attempt to overcome the lack of diff lock, and the lack of axle differential lockers, which Land Rovers should have been fitted with, but weren't.
    Even a Series in 4wd, which has no centre diff, will benefit from axle lockers.
    When you drive an axle locker equipped vehicle off road, you quickly realise there is no substitute in severe conditions.
     
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  3. marjon

    marjon Well-Known Member

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    No problem. They do appear in modern, but not in D 1-2.

    For me bottom line is the transfer box has all the gubbins to have CDL it’s silly to not give the owner the option to be able to use it. CDL and TC can work together.

    Not been stuck with the p38 4wheel TC, but have had to use diff lock in the “slug” :) also the HDC in the 322.
    All have performed fine in the required environment :)
    Not tried HDC on an icey hill though.

    Think understanding how/what a system does is the first part of the battle then learning it’s limits. (Safely)

    J
     
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  4. Turboman

    Turboman Rural Activist

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    I never understood the point of having the diff lock in the box without the controls for it.
    But then, to be honest, I have never understood anything Land Rover did since the mid 1990s.
    And some things long before that, for example, why they didn't fit axle lockers, at least in the rear axle, despite steadily losing market share to Jeep and the Japanese, who mostly did fit them.
     
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  5. marjon

    marjon Well-Known Member

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    Totally agree, they should have fitted some sort of axle diff lock may have help reputation a lot.

    My B reg Quattro when locked up was fun:D

    J
     
  6. Turboman

    Turboman Rural Activist

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    Quattro were an excellent car of their time, and won a lot of rallies.

    My Detroit equipped Ninety was the only thing that could get up the hill outside my house in Cornwall in the ice.
     
  7. marjon

    marjon Well-Known Member

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    LSD would have helped LR hugely. If only they had been willing things would be so different.

    I am favouring TB diffs for the slug in the future.

    J
     
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  8. Turboman

    Turboman Rural Activist

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    I had Detroit Locker in the back, 85% LSD Tru Trac in the front of the Ninety. It was awesome, if there was a fault, it was that it was a bit boring to drive, you could drive over almost anything short of a swamp with one hand on the wheel.

    Nowadays, the Ashcroft diffs are supposed to be very good. I have had ARB air lockers in other vehicles, they are good, with the added advantage of no impact on road handling when not engaged.
    If you want to spend lots of dosh, Quaife are supposed to be fantastic.
     
    Last edited: Sep 3, 2019
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  9. brianconwy

    brianconwy Well-Known Member

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    I am sure 99% of drivers think they are special and better than the system but in reality 0% are better. If formula one drivers benefitted from it then the fact that its reactions are massively greater than humans is proven. The problem is that electronic aids and aerodynamic assisted downforce meant greater speeds and when pushed beyond the limits crashes aoccurred at far greater speeds with less warning.
     
  10. MJI

    MJI Well-Known Member

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    They were relying on good axle articulation.

    D2 can have very good axle articulation
     
  11. Turboman

    Turboman Rural Activist

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    I wasn't particularly talking about D2s, the same applies to all Landrovers.

    Axle articulation won't keep you going when there is minimal traction.
     
  12. Turboman

    Turboman Rural Activist

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    Of course, there is always the possibility that the system on racing cars is better than that fitted to road cars.

    The 10% of drivers being better than ABS was a quote from an article in the motoring press in the early days of ABS on road cars.
    The systems on those may have improved as well.
    But it is still a fact that you cannot actually lock the wheels with ABS, which may be advantageous in some circumstances.
     
  13. Stanleysteamer

    Stanleysteamer Well-Known Member

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    Well the skid marks and the position of the guys wheels at the time of the accident showed his wheels had locked and he had turned them to try to avoid me.
    I don't know how he can have locked his wheels under braking without activating his ABS, does any one know how that can happen?
     
  14. Turboman

    Turboman Rural Activist

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    Maybe it wasn't working. Usually, the wheels of a car with ABS under hard braking leave a line of little dashes of rubber on the road as the wheels lock and unlock rapidly.
     
  15. Michalis Karatzis

    Michalis Karatzis Active Member

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    It seems like his ABS didn't work so maybe he was right blaming the car for the accident.
     
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  16. Si Click

    Si Click Well-Known Member

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    If the wheels were locked then ABS was not active; which explains why he was unable to steer and avoid you. I seem to remember you saying he claimed the ABS did not work; he was probably right. I guess it could have been unserviceable, or perhaps there was so little traction that the wheels locked at a lower level of brake effort than is needed to activate the system. If that is the case then he either needed to release and reapply the brake to enable steering as you suggest, or he needed to brake harder and activate the system.
    Either way I don't think the lesson from the story is that ABS is crap and does not prevent collisions. It is that a collision is much more likely if you don't activate the system.
     
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  17. MJI

    MJI Well-Known Member

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    Systems have improved a lot over the years compare an early system with a modern 4 channel system.
     
  18. MJI

    MJI Well-Known Member

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    Broken, or pushed into slide so going sideways.

    To do that driver was a twat.
     
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  19. Stanleysteamer

    Stanleysteamer Well-Known Member

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    He was going straight so the concensus seems to be that his ABS was bust.
    Fair enough, an electro mechanical system he relied on was unreliable.
    What lessons do we draw from this?
    A/ don't rely on systems that can go down without warning, he should have had a warning light.
    B/ go to a skid pan and learn how to cope in a skid situation, that way if your ABS goes up the spout you can at least react in a safe way.

    But at the end of the day, it was 11:45 a.m. rush hour in France, probably the most dangerous one and he was driving down a steep mountain road with a lot of really tight bends. We do it very regularly as we live just off it, he was installing the wind turbines not too far away. We thought he ought to have been familiar with the road, but maybe he wasn't. He was rushing to get the van to a garage for work on the gearbox, so he was going too fast. ABS let go, and he, at least subconsciously was relying on it. So he crashed into our D2 and bent the back axle, among other damage. End of story! At least no one was hurt.
     
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