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Home > Faults & Fixes (L663) > 25MY Defender Gearbox Engagement Delay
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LandyLover1107



Member Since: 23 Dec 2024
Location: Western Cape
Posts: 8
South Africa 
Flinders, that’s disappointing that you were not taken seriously.

I work very closely with a JLR dealer and I can tell you that you’ve identified a problem that most people here aren’t even able to notice.

I hope your replacement car does not have the issue. Please keep us posted if you don’t mind. When is it due to arrive and what is the exact model are you’re replacing it with?
Post #1055530 24th Dec 2024 11:03am
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Flinders



Member Since: 17 Feb 2024
Location: West Yorkshire
Posts: 52
England 
Thanks LandyLover1107 it’s been a tough few months but honestly glad it’s gone now!

I’ve ordered an exact replacement! Although I’ve added the clear view mirror on this one! Ordered replacement 7th December for defender 90 x dynamic HSE D350 Santorini black. Order is still in the holding pool so no idea on when we will get it! Big Cry MY25 Defender 90 D350 X Dynamic HSE - REJECTED Sad
MY18 Discovery 5 3.0ltr TD6 HSE Lux - Derek
Post #1055585 24th Dec 2024 5:37pm
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Crazymind



Member Since: 11 Jun 2024
Location: Glasgow
Posts: 159
United Kingdom 
I think the issue has always been there with all the JRL products for a long time.
I remember my 3.0 v6 XF wa se a tu the same. Same box of bmw 3/5 series. No lag on bmw. Lots of lag with JLR. Same with the Ranger Rover. I am used to it I think but if you are not it’s very annoying and not acceptable.
Post #1055598 24th Dec 2024 8:15pm
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LandyLover1107



Member Since: 23 Dec 2024
Location: Western Cape
Posts: 8
South Africa 
Crazymind the thing is that all JLR cars with the ZF gearbox have been perfect - no issues. I know I sound like a broken record at this point but it's just 25MY with this issue - no other models do it at all, not even in the slightest. Drive a 24MY / 24.5MY and jump into a 25MY - instantly noticeable.

It's something JLR needs to fix ASAP as I am very sure it has resulted in more than just some buy-backs for them, or at least the dealers - such as what happened with Flinders.
Post #1055679 27th Dec 2024 7:32am
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lightning



Member Since: 23 Apr 2009
Location: High Peak, Derbyshire
Posts: 2865
United Kingdom 
Are you talking about the rolling back when "D" is selected
Post #1055688 27th Dec 2024 9:02am
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Zed



Member Since: 07 Oct 2017
Location: In the woods
Posts: 3324
United Kingdom 2010 Defender 110 Puma 2.4 XS CSW Santorini Black
Crazymind wrote:
I think the issue has always been there with all the JRL products for a long time.
I remember my 3.0 v6 XF wa se a tu the same. Same box of bmw 3/5 series. No lag on bmw. Lots of lag with JLR. Same with the Ranger Rover. I am used to it I think but if you are not it’s very annoying and not acceptable.


Lag and other JLR quirky gear changes can be simply fixed with a decent gearbox remap. WARNING.
This post may contain sarcasm.
Post #1055706 27th Dec 2024 12:23pm
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lightning



Member Since: 23 Apr 2009
Location: High Peak, Derbyshire
Posts: 2865
United Kingdom 
And who is going to do that? l've seen many companies offering engine remaps but never a gearbox remap.

lt would have to be specific to the Defender and also in regards to the low range settings.
Post #1055741 27th Dec 2024 6:23pm
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graemesmith1960



Member Since: 03 Sep 2021
Location: West of Scotland
Posts: 75
Scotland 
Saw this post yesterday and became instantly paranoid! My MY25 has 255 miles on it and I've spent all day stopping and starting on hills of various slopes and honestly its absolutely fine. No rolling back or forward. Maybe a slight lag in taking up drive when it is stone cold but that goes away within a couple of minutes. The gearbox in this one feels smoother and quicker on the take up than my MY2022. Maybe its my agricultural driving style! Defender D350 X-Dynamic HSE 110 MY25 Carpathian Grey
Post #1055772 28th Dec 2024 3:24pm
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Zed



Member Since: 07 Oct 2017
Location: In the woods
Posts: 3324
United Kingdom 2010 Defender 110 Puma 2.4 XS CSW Santorini Black
lightning wrote:
And who is going to do that? l've seen many companies offering engine remaps but never a gearbox remap.

lt would have to be specific to the Defender and also in regards to the low range settings.


Loads do specific maps for gearboxes but Darkside Developments would be a good place to start.
https://www.darksidedevelopments.co.uk/dsg..._2C0xRWj3N WARNING.
This post may contain sarcasm.
Post #1055774 28th Dec 2024 3:36pm
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lightning



Member Since: 23 Apr 2009
Location: High Peak, Derbyshire
Posts: 2865
United Kingdom 
That company doesn't mention Land Rover transmission variants at all on their website.
Post #1055777 28th Dec 2024 4:11pm
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Flinders



Member Since: 17 Feb 2024
Location: West Yorkshire
Posts: 52
England 
Graeme be thankful you have one of the ones that is ok. It was intermittently showing roll back and was more obvious in stop start traffic on inclines when waiting for lights to change etc.

Not all have the issue and it’s probably luck of the draw. I did joke mine was a Friday car as it had 26th July as build date! Little did I know it was true re a Friday build! Lol! Also if you have the auto brake assist function switched on it will always hold. Not something I wanted to use as a plaster to cover up the problem.

A reprogramme of every gear individually cleared the issues with the unsmooth gear changing etc. MY25 Defender 90 D350 X Dynamic HSE - REJECTED Sad
MY18 Discovery 5 3.0ltr TD6 HSE Lux - Derek
Post #1055781 28th Dec 2024 4:39pm
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graemesmith1960



Member Since: 03 Sep 2021
Location: West of Scotland
Posts: 75
Scotland 
Mine was built towards the end of November, just before the change to MY25.5. Maybe they realised there was an issue and sorted it? Being JLR I doubt it though. Defender D350 X-Dynamic HSE 110 MY25 Carpathian Grey
Post #1055782 28th Dec 2024 4:56pm
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mf7480



Member Since: 14 Jun 2021
Location: Gloucestershire
Posts: 92
Were there any changes for MY25.5?
Post #1055784 28th Dec 2024 5:05pm
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F-Typical



Member Since: 05 Sep 2024
Location: Hereford
Posts: 43
United Kingdom 
Re: 25MY Defender Gearbox Engagement Delay
LandyLover1107 wrote:
Hi everyone.

I have driven multiple of the new Defenders and specifically the diesels.

As of very recent (with the latest model D350 25MY) I have noticed a very annoying issue when setting off from a stand-still.
That is, with the vehicle in Drive "D" and the brake applied, letting go of the brake pedal and pushing the accelerator causes the revs to climb and after a second the gearbox actually kicks in. This results in a very jerky pull-away. Almost as though every time the car comes to a stand still, the gearbox / torque converter will disengage and takes too long to re-engage upon wanting to drive off.

Has anybody else with the most recent Defenders experience something similar? They never used to do this. The dealer does not seem to know of anything to solve this.


Having been driving a 90 D350 for a whole five days now, I recognise what you describe, but it feels like the brakes being released that appears to be causing the effect. HTH
Post #1055785 28th Dec 2024 5:26pm
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Flinders



Member Since: 17 Feb 2024
Location: West Yorkshire
Posts: 52
England 
I did sometimes wonder if it was the brakes as I also had a noisy EPB which seemed to take ages to release or come on with the length of noise it made. The reprogramming of the gearbox that’s the technician completed did correct the issue but it didn’t solve the rolling back. To be honest my D350 had so many faults from little things to major I am just glad it’s gone! Feel sorry for the next person that buys it Sad MY25 Defender 90 D350 X Dynamic HSE - REJECTED Sad
MY18 Discovery 5 3.0ltr TD6 HSE Lux - Derek
Post #1055805 28th Dec 2024 9:48pm
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