Transmission coolers

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One for Niall others might have some input?
Was looking at the thinkauto site (they make the mocal range) and found
these. If you stick with an auto what would your thoughts on these oil
coolers be? (also used for transmission fluid)
http://www.thinkauto.com/laminova.htm
I am thinking the coolant to oil will give a more stable transmission fluid
temp in high air temps with poor airflow, perhaps even warm the fluid in the
winter. They look like an fairly easy install, don't need to be mounted in
air flow and don't get blocked with mud.
Malcolm
Stafford (UK)
FJ45 '75 & FJ45 '76
 
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Malcolm
Isn't it BMW who have had major corrosion and contamination problems
from mounting the AT oil cooler in the radiator?
I'm not saying this is a bad idea, but the consequences of a leak
(either direction) would be nasty!
Christopher Bell
| Was looking at the thinkauto site (they make the mocal range) and
found
| these. If you stick with an auto what would your thoughts on these
oil
| coolers be? (also used for transmission fluid)
|
| http://www.thinkauto.com/laminova.htm
|
| I am thinking the coolant to oil will give a more stable transmission
| fluid
| temp in high air temps with poor airflow, perhaps even warm the fluid
in
| the
| winter. They look like an fairly easy install, don't need to be
mounted
| in
| air flow and don't get blocked with mud.
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Don't know about BMW, I have know some sort of radiator heat exchanger is
used on MB engines like the one in my wifes Crossfire but I don't know if
that is transmission or oil, they have been known to fail though.
It would be nasty if it failed but fluid/fluid heat exchangers are being
used on lots of engines now. The Nissans we ran had a little sandwich
cooler mounted at the oil filter, Daihatsu have used them for quite a while.
If the pipe in the middle is thick enough it should be very robust and
resistant to corrosion, I have a feeling the radiator units are a quite
different construction. Perkins use a cooler system similar to the laminova
design but case in a housing, CAT also have something similar but bigger.
On the heating the cold trans fluid - perhaps not, I forgot the coolant
thermostat will prevent the circulation through the cooler until the engine
is warm and the transmission will probably be warm by then.
Malcolm
Stafford (UK)
FJ45 '75 & FJ45 '76
-----Original Message-----
From: [Email address removed] [mailto:[Email address removed]] On
Behalf Of Christopher Bell
Sent: 12 September 2008 09:37
To: [Email address removed]
Subject: RE: [ELCO] Transmission coolers
Malcolm
Isn't it BMW who have had major corrosion and contamination problems
from mounting the AT oil cooler in the radiator?
 
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Hi Malcolm
They look the business. But...
less than about 40Km/hr (bear in mind I was expedition weight also -
so heavy load).
This was normally going up hill or in deep sand - so the engine was
being driven hard also.
(I never experienced AT overheating at speeds in excess of about 65Km/hr)
So both engine and gearbox were being worked hard and both were
generating "above normal" heat loads.
As you point out - An air cooler's effectiveness is reduced by the low
speed - so while it helps I would also question its effectiveness
under heavy load and low speed.
When I drove the cruiser in High range under under heavy load and low
speed the box overheated. But the engine coolant also overheated
(boiled agressively) in this scenario. Mainly because I was trying to
keep the speed up to keep the air flow. So I would question the
effectiveness of one of these water cooler things in similar
circumstances as if the engine coolant is boiling it cant be cooling
the AT oil? - might even add to the problem.
The solution in relation to AT boxes and temperature is correct gear
selection for the road conditions. Long assents up mountains require
early selection of low range. You can drive all day (all be it at
about 25KM/hr) up a hill/mountain on dirt road and not overheat in low
range. Try get up in high range and your AT light will be on very
quickly.
In deep soft sand - again low range but in conjunction with low tyre
pressure will leave you cruising along all day with no overheating
problems and you wont be stuck unless in really really bad stuff.
Beware of agressively patterned tyres - they dig into the sand and
increase the strain on the vehicle. Bridgestone or yokahama do a tyre
called "Jemel" - the tread consists of pads like camels feet - superb
in the sand but never saw them outside the sahara.
I was glad I had an second AT oil cooler but its effectiveness is as
you say a bit limited to your speed.
My advise would be to give more consideration to driving techniques,
tyre pressure and tyre tread pattern.
The real solution to gear box temp problems is to get a manual.
Cheers
Niall
On Fri, Sep 12, 2008 at 8:48 AM, Malcolm Bagley <[Email address removed]> wrote:
 
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Niall,
I think that unless there is damage to the auto box, stay with it, but consider upgrading the valves to the Extreme Valve bodies as supplied by http://www.automatictransmission.com.au/ in Aus - this will allow greater oil flow through the box giving better changes and also enables the box to run cooler - these are certainly advisable considering the extra power going to the box from the intercooler.
The other thing is to move over to fully synthetic gearbox oil - this tends to run at lower temps.
Finally, I'm investigating full width auto box oil coolers to run across the bottom of the Allisport intercoolers - I should be fitting an intercooler to mine next week and will then be looking for a bigger oil cooler to go with it.
Having said all that, I'm wondering if you have an inherent cooling problem anyway, if the engine is overheating - the most reports I have had of them overheating have all been down to cooling problems (blocked rad, faulty fan clutch) and not being over stressed.
Regards
Julian
Email: [Email address removed]
Tel:=A0+44 (0)845 508 6863
 
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Hi Guys
Welcome back Niall, now you can settle down after getting that journey out
of your system.
On the subject of AT boxes does anyone know or has anyone had their AT oil
anylised like you would do with the engine oil.
If so what kinds of metals would you be looking for to indicate abnormal
wear.
Is there usually any problems when converting to synth ATF like seals
leaking.
Just wondering how a bigger engine can return better mileage than a smaller
one.
I ask because we went to an american motor show, you know the type all the
muscle cars and so very rare models indeed.
But as you would expect I did ask a few questions and I was told by a few
lads that their V8s 5.8 or 6 lt engines returned more than the cruiser or
the same and these were petrol.
Also there were a few ford 250Ls and 350Ls there and they diesel V8s and
also seemed to return better or equal to the cruisers.
I also found out it costs about 10,000euro to import one to here from the
states.
Just for comparison sake, a 120 2005 cruiser here is about 55,000 euro and
the 250L 2007 with 10,000 euro of upgrades including a 6 inch lift was
50,000euro.
cheers
john 92HDJ 80 1HDT
 
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Interesting question about the analysis.
If you want Niall I can post you a sample bottle, I am sure the oil lab we
use could make some comment.
Malcolm
Stafford (UK)
FJ45 '75 & FJ45 '76
-----Original Message-----
From: [Email address removed] [mailto:[Email address removed]] On
Behalf Of john byrne
Sent: 12 September 2008 20:15
To: [Email address removed]
Subject: Re: [ELCO] Transmission coolers
Hi Guys
Welcome back Niall, now you can settle down after getting that journey out
of your system.
On the subject of AT boxes does anyone know or has anyone had their AT oil
anylised like you would do with the engine oil.
If so what kinds of metals would you be looking for to indicate abnormal
wear.
 
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Malcolm
Just back on the e-mail - very inconsiderate of companies that
restrict internet access. But I've managed to re-wire the computer
direct to the phone line so I can surf :)
That would be very interesting. But I jknow that box is buggered. When
driving it now the O/D light flashes constantly, I've no 1st gear and
when driving it feels like I'm pushing a wall in front of the cruiser.
When I dropped the pan in Libya there was lots of metal on the magnets
and the filter was gummed up.
The box has 360K Km on it so it owes nothing really.
Tinme for a new box I think
Cheers
Niall
On Fri, Sep 12, 2008 at 9:10 PM, Malcolm Bagley <[Email address removed]> wrote:
 
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Hi John
Traumatic being back - days are full of work and commuting - adventure
is limited to weekends but getting there
Niall
 
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Niall,
LC gearbox on ebay 170270084062, no idea if it might be suitable - hasn't
got a gear stick so I wouldn't know what to do with it!
Malcolm
Stafford (UK)
FJ45 '75 & FJ45 '76
 
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