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Additional Automatic Transmission Fluid Radiator



Greetings all

Wondering if anyone has installed an Additional Automatic Transmission Fluid Radiator and if so where it was purchased?

Can't seem to track anything down on the net...

I'm heading south in August and rekon it would be a good addition with a heavy load - especially in sand where the box will be working hard

Any insight appreciated




Hi Niall have what you want at about =A3113 plus delivery to you from the UK.
I was going to get one but money had to be used for something else at the time also I would need someone to fit it as per usual.
But a very good idea so i have been lead to believe.
John 92HDJ 80 1HDT



Man John!

Thanks for that

PS - I'm afraid to change to Amsoil from Dino now incase she starts guzzling like yours when I'm on the long road..... more on that later


The factory cooler is oil/water and is built in to the bottom of the
radiator - it is generally held to work pretty well. An extra cooler (as
opposed to a replacement) can only help, but if not carefully positioned and
mounted might be vulnerable to damage which the factory one isn't.
If you're looking to beef up your auto box for desert work, then I'd
recommend the extreme valve body from Rodney at Wholesale Automatics in
Australia. This increases the clamping pressure on the clutch packs,
increases the flow through the factory cooler (or aftermarket cooler if
you've fitted one) and gives firmer/faster changes to reduce wear on the
box. It is easy enough to fit, a low torque (can't remember the figures off
the top of my head) torque wrench is the only tool needed that you maybe
might not have. The downside is the price.
A temperature gauge is also a worthwhile investment. Rodney also sells an
easy to fit gauge kit, though if you have the tools to drill and tap a hole
for the sender you can get all the relevant bits locally.
We crossed the Ubari sand sea in Libya (four days continual dune driving)
and didn't need to stop and let the box cool. This was with the extreme
valve body, factory cooler and running very tall tyres without corrected
gearing. However, I was glad of temperature gauge as an early warning.
Two elements of mechanically sympathetic dune driving seem to be to keep the
overall weight down as much as you can, and to run low enough tyre
A switchable version of the 'Pin 7' mod is worthwhile too - the factory low
range pattern is useful in some situations but a pain in others.
There are doubtless those who've taken their autos through the dunes without
any modifications or any problems, but adding an extra cooler into the
circuit should be worthwhile, and a temp gauge will at least let you know
what's going on.
Enjoy your trip.
1990 HDJ80 UK


Re: If you're looking to beef up your auto box for desert work,

Thanks for the feedback Toby

Good food for thought there.

Had my bus in the dunes 2 years ago without any mods. No problems. But we had a base camp and so were able to unload everything when we went dune blazing so were nice & light.

Temp gauge is a must I rekon.



As you have a temp gauge, did you compare temperatures recorded on
soft sand while running in the High and Low range? I'd be interested
in your observations. When did you visit Libya last time?
Roman (London, UK)
'92 HDJ80
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Hi Roman,
We were in Libya for the first time mid-January this year, and will
definitely be going back ;-)
The autobox didn't like high range in soft sand, at least not with a week's
worth of fuel and water on board. The rate the temperature started to rise
when I first tried this put me off trying high range for the rest of the
crossing. (And being fairly new to the auto I hadn't mastered on-the-move
range shifting - one thing a manual wins at IMHO). Low range was fine, but
I'd have really liked to have been able to switch off the low range shift
pattern. At times the need to 'fool' the gearbox into shifting up with a
push of accelerator wasn't ideal. This mod is very easy so will be done
The temperature gauge was quite interesting; we saw temps go from 80 to 130
degrees climbing the bigger dunes, however they would come back down at
least as fast as they went up. Having said that, I've seen similar temps on
road back in the UK. I would guess long low speed climbs are where you're
most likely to see problems.
I should probably also point out that we were on 255/100/16 tyres and hadn't
re-geared so were probably putting extra stress on the box. OTOH the tall
thin tyres worked a treat on the sand (got stuck only once during the trip,
and neither driver was experienced on the sand) so maybe it evened itself
out. It will be interesting to see the temps when the 4.88 R&Ps are in.
All in all, having taken one auto 80 and one manual 80 on the trip I'd say
the auto was ideal for the desert - though the manual performed just as well
it made more work for the driver.
All the best,
1990 HDJ80 UK