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Peter



Member Since: 04 Mar 2012
Location: Kent
Posts: 153

United Kingdom 2005 Defender 90 Td5 SW Epsom Green
Automatic oil cooler
Does anyone know if an automatic gearbox oil cooler needs to be force air fed, like the intercooler and rad.
or can it just be installed anywhere on a vehicle ?

Thanks

Peter
Post #381741 25th Dec 2014 9:18am
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diesel_jim



Member Since: 13 Oct 2008
Location: hiding
Posts: 6093

United Kingdom 2006 Defender 110 Td5 SW Epsom Green
Some fit coolers (like on challenge trucks) in the tub behind the bulkhead, but as with any cooler, it needs air to remove the heat, so in an air flow would be preferable.

The ones i've seen fitted in the back of vehicles usually have a fan on them too.
Post #381750 25th Dec 2014 9:41am
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Alex1976



Member Since: 23 Jan 2013
Location: Buckingham
Posts: 596

England 
From what I understand there is no such thing as overcooling an auto box - so the more air flow/cooling the better.

I have a standard discovery oil cooler on my Defender and I am considering uprating this to a heavy duty Allisport one as I think my auto box gets too hot when I am pushing it hard.

I have my auto cooler mounted up front (in front of the rad and intercooler) so it gets as much cooling as possible.
Post #381788 25th Dec 2014 11:33am
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NickH



Member Since: 01 Nov 2014
Location: Halifax
Posts: 204

England 2003 Defender 90 Td5 PU Rimini Red
I used to replace the oil cooler with a made up hydraulic hose, the longer the better to dissipate more heat.
You can either run it up and down the chassis or in a snake behind the front grille.
This was on comp safari motors where the autobox got beaten to death. The advantages being it doesnt get bothered/clogged with mud and you can run it anywhere. The longer it takes the oil to get back to the autobox the cooler it becomes and you are also increasing the volume of oil which prolongs its life. Thumbs Up 2003 Td5 90
2013 sport hse
2012 700 raptor quad
2012 siromer 4x4 tractor
Post #381909 25th Dec 2014 11:47pm
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Supacat



Member Since: 16 Oct 2012
Location: West Yorkshire
Posts: 11018

United Kingdom 2013 Defender 110 Puma 2.2 XS DCPU Keswick Green
or you could fit one of these nearly anywhere:

Click image to enlarge
Post #382251 27th Dec 2014 10:15am
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K9F



Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

United Kingdom 2008 Defender 90 Puma 2.4 XS CSW Stornoway Grey
That's the same principle used on the vessels I work on where each engine has a ton of oil in them. Where are you going to get your supply of cold water from to cool the oil sufficiently on a vehicle? Easy on a boat you have an endless supply upon which you are floating. If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!
Post #382256 27th Dec 2014 10:28am
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rallysteve



Member Since: 10 Feb 2014
Location: Cumbria
Posts: 2229

United Kingdom 2002 Defender 110 Td5 DCPU Keswick Green
Quite a few vehicles have water to oil coolers which can also help to bring the oil upto temperature. Although a damaged cooler on an autobox which could let water into the fluid would ruin the box. 02' 110 TD5 Double Cab Rebuild Thread
Post #382270 27th Dec 2014 11:29am
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Supacat



Member Since: 16 Oct 2012
Location: West Yorkshire
Posts: 11018

United Kingdom 2013 Defender 110 Puma 2.2 XS DCPU Keswick Green
Many people rate these over a traditional air to oil cooler

http://www.laminova.se/products/oil-coolers/

especially in extreme applications.
Post #382280 27th Dec 2014 12:27pm
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 8033

 2011 Defender 110 Puma 2.4 USW Stornoway Grey
I run a Laminova, the largest one on one of my trucks. It's ok but has its limitations. In the end I fitted ask inline air to oil cooler too. Disco one.

I also run a 19&23 route seen cooler air to oil on another truck but run dedicated fans.

these are all on hp24/22 amalgamated boxes from Ashcrofts.

I would run a dedicated fan if its a std cooler unless your on small 31" tyres, or not towing. Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop
Post #382437 27th Dec 2014 7:44pm
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