Transmission Oil Cooler

Submitted: Wednesday, Jun 21, 2006 at 14:22
ThreadID: 35141 Views:5513 Replies:6 FollowUps:0
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I have a 2002 Challenger and will be picking up a 17.5 foot van which the laden weight should be 100kg below the handbook max towing weight.

Mitsibushi adcise that a transmission oil cooler is not needed when towing to the vehicle handbook and there are 2 years to run on the manufacturer warrenty.

In January school holidays next year we are scheduled to travel from Mount Isa down the 'coast' to Brisbanne and Canberra and returning via Bourke to Mount Isa which will be fairly hot.

Do anyone have experience with this route in a Challenger and do you think an oil cooler would be worth the risk of a warranty problem versus being stuck out west while the temp cools down?
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Reply By: disco driver - Wednesday, Jun 21, 2006 at 17:24

Wednesday, Jun 21, 2006 at 17:24
Hi Turist,

Do Mitsubishi list an Oil Cooler as a factory accessory? If so, should not be a warranty problem if you decide to fit one.

Fitting one or not is your decision but as long as you do not exceed max towing weights you should not have problems with warranty.

AnswerID: 179700

Reply By: Turist - Wednesday, Jun 21, 2006 at 17:39

Wednesday, Jun 21, 2006 at 17:39
There is no oil cooler listed as a Factory Accessory for by Mitsibushi unfortunately
AnswerID: 179702

Reply By: Exploder - Wednesday, Jun 21, 2006 at 19:29

Wednesday, Jun 21, 2006 at 19:29
Mitsubishi are idiots, if you Tow with an Auto Transmission you should fit a transmission Cooler, Heat is the Auto’s enemy.

Worth risking the warranty over, I don’t know, Have they told you it will void the warranty?

If you do it without the cooler so as not to void warranty, Change the fluid before you leave and then agene when you return along with the Transmission filter, then when warranty expires fit a trannie cooler.

Even better fit a Cooler and if you have any Warranty work to be done, just pull it off and retune it to stock, as it’s only a few hoses and a bracket.
AnswerID: 179740

Reply By: awill4x4 - Wednesday, Jun 21, 2006 at 22:37

Wednesday, Jun 21, 2006 at 22:37
If you're towing, an auxilliary cooler is a "must have" in my opinion. Having gone through an auto trans rebuild on my GQ Patrol about 5 years ago it's an expensive option I have no wish to repeat.
Basically, heat is the single biggest killer of auto transmissions and unfortunately if you don't have an auto temp gauge fitted then you have no idea just how hard your auto is working under various conditions.
After lots of research and talking to some very experienced 4x4 auto transmission specialists I have gone to the extent of isolating the transmission from the radiator coolers entirely and use 2 front mounted oil coolers instead. On a winters day like today it runs at 50 degrees and on a summers day it runs at 60 degrees rather than 80 degrees it used to run at when plumbed into the radiator which would then climb to over 110 when 4x4ing.
You will give yourself great peace of mind fitting an auxilliary cooler and I would highly recommend fitting an auto temp gauge at the same time and monitor your auto temps while under severe load.
Regards Andrew.
AnswerID: 179787

Reply By: Member - Camper (SA) - Thursday, Jun 22, 2006 at 13:30

Thursday, Jun 22, 2006 at 13:30
I agree with the others who have suggested fitting a cooler.In towing you can extend the life of your auto trans very effectively with one.
AnswerID: 179877

Reply By: David from Engine Saver Low Water Alarms - Thursday, Jun 22, 2006 at 16:30

Thursday, Jun 22, 2006 at 16:30
I Don't know if the Challenger is fitted with a transmission oil cooler or not as standard, but most of the Magnas were.

Most of the radiator shops seem to recommend them though.
Automatics can run very hot when towing and once the fluid exeeds 93'C
It's lubricating and cooling properties deteriorate rapidly.
It could be a wise choice.

AnswerID: 179910

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