 | Home > General & Technical (L663) > Rear locking diff |
 
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| familymad Member Since: 13 Dec 2011 Location: Bucks Posts: 3481   
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I wonder if it’s fitted to all but the functionality isn’t unlocked unless you spec it? 1951 80" S1 2.0
1995 110 300TDI 1995 90 300TDI |
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1st Sep 2020 8:33pm |
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| KBKLR Member Since: 16 Jul 2020 Location: Aberdeenshire Posts: 15 
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I specced it on my disco 4 and to be honest it saved a bit of brake pad wear and that was all. I have not specced it on my Defender.
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1st Sep 2020 8:36pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8032 
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Using back to back testing vehicles some with some without a rear locking diff on the discovery, rrs, rrv platforms over a 10 year period the ones with rld climbed Hills much smoothing and had significant less rear pad wear. I woulndt buy a new product without one as I use the vehicles off road. Cheers
James 110 2012 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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1st Sep 2020 9:26pm |
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| Tim in Scotland Member Since: 23 May 2007 Location: The Land that time forgot Posts: 3753
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I had one on my last RRS as it was standard on Dynamic models. It made quite a difference although I never did any extreme off-road stuff just green lanes but I never needed to change off the 22” road tyres never got stuck on wet grass or in mud and had it lock up a couple of times on very wet roads and in snow. Basis that experience I wanted to spec it on my new Defender but the dealer nation stock had only one First Edition with it and it didn’t have the enhanced security system, it had no security system, and I didn’t want to wait for a factory order........ also considered the security more important than a e-diff in day to day motoring. L494 RRS were also prone to a leak on them That required a complete replacement that would be expensive out of warranty...... Pangea Green D250 90 HSE with Air Suspension, Off-road Pack, Towing Pack, Black Contrast roof , rear recovery eyes, Front bash plate, Classic flaps all round, extended wheel arch kit and a few bits from PowerfulUK Expel Clear Gloss PPF to come
2020 D240 1st Edition in Pangea Green with Acorn interior. Now gone - old faithful, no mechanical issues whatsoever ever but the leaks and rattles all over the place won’t be missed! |
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1st Sep 2020 10:07pm |
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| ChasingOurTrunks Member Since: 19 Aug 2020 Location: Canada Posts: 89 |
I'm also curious if they can be added after the fact, as that will be a major question for buyers in the used market in a few years time. If fitting a JLR locker after the fact isn't possible, what about other manufacturers like ARB air lockers?
I also wonder if the rear locker functionality is different depending on the Terrain Response option one gets? For instance, from the advertisements it seems that the TR2 offers total customization so a person could manually lock the centre and rear diffs if they want, whereas the standard Terrain Response does not allow for this manual locking, only the selection of various drive modes. Is that accurate, or is the rear locker controllable separately from the Terrain Response? I have no experience with the lockers on any Land Rover vehicle, but I have had them on my last two adventure vehicles. I didn't have it on my earlier ones, but having used them I won't buy an adventure rig without one now, because the increased performance allows for a dramatic increase in mechanical sympathy by the driver -- obstacles that required momentum in my unlocked vehicle simply get crawled over at a snails pace in the same rig with a rear locker. But, being able to switch it on and off is key -- I'm currently equipped with an auto-locker (True locker, not just an LSD) and it's good, but not as good as a switchable one because it requires wheel slip before engaging. The diff won't engage without that slip, so there's traction loss on one wheel, and then the diff locks which slams the other wheel into rotation, which can "shock" it out of traction too. Its only happened once, but it's never happened on a switchable rear locker. Edit to add: I know the Defender's system depends on wheel slip to operate also, but it's electronically controlled so the amount of wheel slip is minimal relative to my auto-locker in the truck, which is mechanically controlled. |
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1st Sep 2020 11:09pm |
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| zilch Member Since: 11 Sep 2019 Location: Whitsundays & Sydney Posts: 819 
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I have a rear diff on my 2nd RRS, and like Tim i have found it certainly smoothed out some of the more
challenging off road tracks i have had to tackle, unlike some vehicles that i observed (D3/D4/RRS) without it, they seemed to need far more "wellie" and to scramble over..whereas the ediff enabled far more poise and less frenetic vehicle traction intervention.. if that makes sense  This was the top of my options list
when i spec'd and ordered the new Defender yet another pommie bar steward down under MY20 110 P400 SE Defender MY10 3.0 RR Sport |
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2nd Sep 2020 1:13am |
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| Retroanaconda Member Since: 04 Jan 2012 Location: Scotland Posts: 2647 
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Thanks all. I think it’s worth the extra cash then.
I don’t think I need to splash out almost the same amount again though for TR2 as from what I can gather the normal TR modes are more than clever enough. They know when to lock the diff and when not to, and indeed apply progressive degrees of locking in between. |
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2nd Sep 2020 6:10am |
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| Tim in Scotland Member Since: 23 May 2007 Location: The Land that time forgot Posts: 3753
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In case anyone is wondering what the difference between Terrain Response and Terrain Response 2 is , as far as I know it’s the Auto setting in TR2 where the car’s computer decides which mode of TR to use. So in TR you will not have the Auto option on the dash. I’m not sure but I think if you don’t have TR2 you also cannot have the ATPC - All Terrain Progress Control (aka off road cruise control). one thing I don’t understand in the new system in New Defender is why LR renamed “Highway” to ‘Comfort’. To my dumb brain Comfort is a suspension setting - like the German car makers put onto their adjustable suspension and Highway is kind of self explanatory when on the screen with the other function icons.
I’m also not sure what Eco does, usually in EV’s you avoid using it as much as possible as it disables the climate control and kills the throttle sensitivity In other words making the car uncomfortable...... Pangea Green D250 90 HSE with Air Suspension, Off-road Pack, Towing Pack, Black Contrast roof , rear recovery eyes, Front bash plate, Classic flaps all round, extended wheel arch kit and a few bits from PowerfulUK Expel Clear Gloss PPF to come 2020 D240 1st Edition in Pangea Green with Acorn interior. Now gone - old faithful, no mechanical issues whatsoever ever but the leaks and rattles all over the place won’t be missed! |
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2nd Sep 2020 7:35am |
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| Retroanaconda Member Since: 04 Jan 2012 Location: Scotland Posts: 2647
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Thanks Tim.
I believe TR2 also has a configurable mode where you can set your own parameters for different scenarios. That would be the only selling point for me, but I don’t think it’s worth the cash given how good the standard TR is and, realistically, the more limited off roading that I will be doing in it. |
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2nd Sep 2020 8:16am |
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| miker Member Since: 13 Sep 2015 Location: Surrey Posts: 1763 
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Just on a price point, it's at least relatively comparable to the cost of fitting a rear locker in an old defender!
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2nd Sep 2020 8:21am |
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| Tim in Scotland Member Since: 23 May 2007 Location: The Land that time forgot Posts: 3753
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The TR2 in the other models - RRS/D5/FFRR isn’t yet configurable so my view is that configurablity in the Defender is a separate thing. Most of my off-roading is what those in the south would call Greenlaning With the Scottish Green Road Club, I’ve not been brave enough to take the new one on one of their more serious offroad days at Bathgate / Torphican, preferring to use my old 90 for mud plugging and damaging stuff but it has been on 2 Green Road Runs at Killin and Whiteleys Wind Farm. Killin wet and muddy in places but I had no problems on the All Season tyres. The club has a run over the north east shoulder of Ben Lomond on a private shooting / farm track coming up and I’ll take the new one on that - a big test will,be the very steep uphill on mud and fallen leaves from the east shore of Loch Lomond back up to plateau Via a load of hairpin bends
BTW, it’s a pity LR don’t make AT tyres standard with All Seasons the option because I can see a lot of people thinking that from the reviews they have an almost invincible vehicle............ only to find how useless it is on All Season tyres when you point then]m at a patch of mud or damp grass.......... I expect a few videos coming on showing somebody’s lovely new Defender on wet grass or mud with all 4 wheels sinning and the owner (And doubtless a few journalists) ranting on about how useless the car is on showroom tyres. Pangea Green D250 90 HSE with Air Suspension, Off-road Pack, Towing Pack, Black Contrast roof , rear recovery eyes, Front bash plate, Classic flaps all round, extended wheel arch kit and a few bits from PowerfulUK Expel Clear Gloss PPF to come 2020 D240 1st Edition in Pangea Green with Acorn interior. Now gone - old faithful, no mechanical issues whatsoever ever but the leaks and rattles all over the place won’t be missed! |
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2nd Sep 2020 8:36am |
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| Retroanaconda Member Since: 04 Jan 2012 Location: Scotland Posts: 2647
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I’ll try and get along to one of the SGRC trips once I’ve got mine, then we can compare with rear diff and without. Been meaning to join for a while but never got round to it, most of my off-roading is greenlaning in England/Wales and I don’t really like paid trips but it’ll be good to do a few closer to home.
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2nd Sep 2020 12:09pm |
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| donmacn Member Since: 06 Nov 2017 Location: Nth Scotland Posts: 1841
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I have seen this very scenario myself. Not sure if these pics made it to the feature in the latest edition of LRO as my copy is at home, while I'm not, but the photos and videos were taken... Donald 1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong (The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html ) 2000 Range Rover P38 4.0L V8 in the past.. RR classic - fitted with 200Tdi 1984 RR classic - V8 with ZF auto box 1993 Discovery 300Tdi not to mention the minis and the Type 2 VW camper... |
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2nd Sep 2020 3:46pm |
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| SteveT247 Member Since: 21 Feb 2011 Location: Central Posts: 491  
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ARB do a manual air locker for D3/D4, would this fit the new Defender?
https://www.devon4x4.com/air-locker-landrover-discovery.html |
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2nd Sep 2020 4:56pm |
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