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BradleyF



Member Since: 18 Oct 2023
Location: Kent
Posts: 18

United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Havana
New Owner Question - Warm/Hot Transmission Tunnel
Hi all,

Possibly an obvious question but as a new owner I thought I'd ask the experts here.

I've quickly noticed that the transmission tunnell, in the interior of the cabit, seems to be getting pretty hot. Is this normal, and if not, where should I start my investigations?

Thanks in advance!

2015 90 Station Wagon
Post #1042069 6th Aug 2024 4:15pm
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landy andy



Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5642

2006 Defender 110 Td5 USW Zermatt Silver
Normal and worse if windows are open in my experience.
Post #1042070 6th Aug 2024 4:20pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17311

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Agree 100% with Andy.
Post #1042072 6th Aug 2024 4:40pm
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Ianh



Member Since: 17 Sep 2018
Location: Essex
Posts: 1971

United Kingdom 
On long journeys on warm days it can get so hot that you can burn your hands if you touch the seat rail or metal parts of the hand brake lever. It’s worse with the 2.2’s as a DPF regen produces even greater heat. As others have said, if you open the drivers window it makes it worse as it draws heat via the seatbox.

I’ve found that if you open the passenger window it, not the drivers,it cools things down a bit.

Better still, keep windows shut and run aircon.

Ps. There are a couple of topics on the issue if you do a search.
Post #1042077 6th Aug 2024 5:24pm
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BradleyF



Member Since: 18 Oct 2023
Location: Kent
Posts: 18

United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Havana
Fantastic, thank you for the reassurance everyone!
Post #1042078 6th Aug 2024 5:30pm
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markb110



Member Since: 22 May 2010
Location: Guildford
Posts: 2617

England 2002 Defender 90 Td5 HT Epsom Green
Nice in the winter though…. Whistle
Post #1042079 6th Aug 2024 5:35pm
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BradleyF



Member Since: 18 Oct 2023
Location: Kent
Posts: 18

United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Havana
yeah, feels like the heated seats will be a bit redundant
Post #1042080 6th Aug 2024 5:36pm
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LR90XS2011



Member Since: 05 Apr 2011
Location: bickenhill
Posts: 3639

United Kingdom 2011 Defender 90 Puma 2.4 XS CSW Galway Green
centre box removal reduces this significantly on a 2.4 DEFENDER 90 TDCI XS,

I hope everyone is well and your land rovers make you happy
Post #1042081 6th Aug 2024 5:37pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20270

United Kingdom 
Yeah, the centre box creates loads of heat and is restrictive as well.
Post #1042085 6th Aug 2024 7:12pm
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landy andy



Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5642

2006 Defender 110 Td5 USW Zermatt Silver
Removal of the Cat helps hugely 👌🏻👌🏻
Post #1042086 6th Aug 2024 7:48pm
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swt



Member Since: 24 Aug 2018
Location: Cumbria
Posts: 160

United Kingdom 2008 Defender 110 Puma 2.4 XS CSW Stornoway Grey
LR90XS2011 wrote:
centre box removal reduces this significantly on a 2.4


Mine used to get dangerously hot. Since I removed the centre box, it doesn't feel appreciably different to rest of the interior. Completely transformed.
Post #1042088 6th Aug 2024 8:35pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20270

United Kingdom 
Air in, gas out is what makes sense for heat dissipation and performance.

As it is such things as the centre silencer is like asking someone to run a marathon with a mask on..

And as if the offset inlet and outlet isn’t mad enough trapping the hot gasses in there, with poor inlet to outlet flow, I expect there is baffles inside as well that get clogged and add even further to the restriction and surface area to pick up and retain, plus radiate even more heat which will also increase EGR upstream I’d have thought too.

Has anyone opened one of the silencer boxes? I seem to think they have a kind of perforated baffle inside of them, like a washing machine drum internally kind of thing.
Even the rear silencer is restrictive, for a while I went straight through centre but kept the rear.
Last year I put a straight through rear as well and runs even better, sound wise is just right I like it where I thought it maybe a bit load a 3” open rear but it isn’t.
It sounds better and drives better, not surprising, considering gasses are pushed out easier and with a smooth flow rate, and restrictions or baffles that swirl or deviate exiting gas flow increases heat, and decreases performance.
The factory fit is decreasing performance, reduces MPG so makes sense to improve MPG in the process.
Post #1042105 7th Aug 2024 8:06am
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Scotm



Member Since: 28 Feb 2014
Location: Aberdeenshire
Posts: 666

Scotland 2012 Defender 110 Puma 2.2 SW Orkney Grey
I used to suffer from this. Not great with no air conditioning.

Last summer I stripped the front seats, matting, centre seat box panel and plastic gear box tunnel out.

I lined footwells, inside and outside the seat boxes, both sides of the lids and the gear box tunnel in front of the plastic removable bit with Dodo Thermo Liner Pro 5mm SE.

I refreshed seals on all the lids and also took extra effort to make sure the plastic gearbox tunnel was sitting properly sealed.

Our trip to Spain last month in 30+ degree temperatures was a much more pleasurable experience. No issues with open windows.
Post #1042108 7th Aug 2024 9:20am
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HardCharger



Member Since: 03 Mar 2013
Location: Manila
Posts: 729

Philippines 2011 Defender 110 Puma 2.4 SW Stornoway Grey
I'm not sure if it's related or anything but I recently replaced my fan blower motor and had my A/C system cleaned but used a different shop to do so.

In any case, the A/C was colder now but the air from the vents wasn't as strong as before. I felt some air at the base near the gear lever and thought that maybe some modification to the coil box was not put back but it did help keep the lower area cooler. Not sure if it's coincidence but there seems to be a cut out on the lower left front of the plastic tray (if you don't have a cubby box) that seems to also be in the line of fire of the "escaping" air from the coil box so that may help cool things down. Definitely cooler now than it was before in the cabin.
Post #1042543 12th Aug 2024 7:31am
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LR90XS2011



Member Since: 05 Apr 2011
Location: bickenhill
Posts: 3639

United Kingdom 2011 Defender 90 Puma 2.4 XS CSW Galway Green
swt wrote:
LR90XS2011 wrote:
centre box removal reduces this significantly on a 2.4


Mine used to get dangerously hot. Since I removed the centre box, it doesn't feel appreciably different to rest of the interior. Completely transformed.


Centre box removal is a no brainer, it is also very heavy so another plus for getting rid of it DEFENDER 90 TDCI XS,

I hope everyone is well and your land rovers make you happy
Post #1042546 12th Aug 2024 7:58am
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