Transmission cooler for kluger

Submitted: Wednesday, Dec 20, 2017 at 17:18
ThreadID: 136003 Views:2199 Replies:7 FollowUps:8
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Hello folks I was just having a discussion with my mechanic the other day I told him I was about to purchase a jayco swan outback now it is fitted with most options air con and twin tanks and whatever I put in it so let’s say it will be close to 1.5 tonnes the 2009 kluger towing capacity is 2 tonnes He said even if the it is still within the klugers limit I should install one as constant pulling will put strain on the gearbox . also heat is no good for a gearbox he insists I should put one on ..what I want to know is there anyone towing that much weight or more with a kluger that has a cooler on theirs ?
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Reply By: HKB Electronics - Wednesday, Dec 20, 2017 at 20:44

Wednesday, Dec 20, 2017 at 20:44
Can't comment for the Kluger, but I have Prado towing a camper of around 1800Kg. I fitted an additional trans cooler to it after reading of the trans fluid temperatures others were seeing while towing. When I fitted the cooler I also changed the trans fluid, it was burnt brown.

I would suggest fitting a cooler would be a good idea to keep the fluid temperature down.

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Follow Up By: RMD - Wednesday, Dec 20, 2017 at 21:23

Wednesday, Dec 20, 2017 at 21:23
If it was burnt the fluid would smell bad and the lubricity would also be diminished. Many fluids now are brown from new and people have it replaced because it isn't red as they expect it to be. Always know the original colour before changing fluid as it may be unnecessary. However, fresh ckean fluid is best to have. Cooler almost essential as many towing situations in Oz easily causes too much torque converter heat.
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Follow Up By: HKB Electronics - Wednesday, Dec 20, 2017 at 22:07

Wednesday, Dec 20, 2017 at 22:07
Genuine Toyota fluid is red.

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Follow Up By: Dean K3 - Friday, Dec 22, 2017 at 11:24

Friday, Dec 22, 2017 at 11:24
If the kluger is set up to cool transmission down like Prado then YES

the automatics transmission cooler is somehow interconnected with engine cooling radiator so adding extra thermal heat when towing plus extra engine ambient temperature won't be good for coolant life wear tear etc.

Fortunate I don't tow that much but if i was doing it regularly then it be fitted for sure
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Reply By: Athol W1 - Wednesday, Dec 20, 2017 at 21:15

Wednesday, Dec 20, 2017 at 21:15
All auto transmissions will benefit from extra cooling when towing, some almost need extra cooling when not towing, and for every 10 degrees that you can reduce the trans temp you can double its life. Having said that it is still advisable to run the trans at around the 60 deg mark so as to 'boil off' any condensation that may enter the transmission.

I would also recommend fitting a Scangauge 2 with the appropriate coding installed so as to monitor the transmission temps, especially when towing, and drive in a manner and by selecting the appropriate gear to keep the temps under control.

Regards
Athol
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Reply By: Member - Wildmax - Wednesday, Dec 20, 2017 at 23:00

Wednesday, Dec 20, 2017 at 23:00
My Hilux tows a hybrid camper with a GVM of 2400, and I have fitted a trans cooler and scan gauge (ARB). Sound investment in protecting your vehicle, in my view.
Cheers
Wildmax
2018 Hilux pulling AOR Eclipse
Black Wolf 210 tent

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Reply By: swampy - Thursday, Dec 21, 2017 at 11:19

Thursday, Dec 21, 2017 at 11:19
hi
It may sound obvious ,pick the largest u can fit in the space 12 x 12 inch .
Thickness ranges from 3/4 inch to 2 inch
'
Cooler type construction is very important
Only use plate or plate and fin type
The serpentine tube coolers are not that effective . U need a large unit to do only average cooling .

http://www.trucool.com/products/tru-cool-max
http://www.trucool.com/
http://www.trucool.com/products/tru-cool-lpd
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Reply By: Johnnykluger - Thursday, Dec 21, 2017 at 17:46

Thursday, Dec 21, 2017 at 17:46
Thanks for all your comments yes I will definitely be installing a cooler although my mechanic has told me there are no kits available for the kluger he will have to make one up cheers.
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Reply By: qldcamper - Sunday, Dec 24, 2017 at 08:23

Sunday, Dec 24, 2017 at 08:23
I have never spoken to a transmission specialist that has said not to install a cooler, even when not towing. According to the penrite tech heat it the major enemy of transmission fluid followed by particle contamination, past 130 degrees it is breaking down fast, at 200 it self destructs in minutes, the cooler in the radiator at best gets it down to 80 degrees, but remember it isn't all of the oil that is going through the cooler, it is pressure regulated, most of the oil is going straight back through the workings and only a percentage through the cooler.

Next comes the great debate, do you put the cooler before, after or in parallel with the original?

I opt for before because the hotter the fluid the better the transfer through the cooler, but then if it gets it below 80 degrees the radiator will add heat, but if the tranny is working hard it will never get the fluid below 80 degrees, but this is only my opinion and there are many valid reasons for other configurations.
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Reply By: Johnnykluger - Sunday, Dec 24, 2017 at 11:17

Sunday, Dec 24, 2017 at 11:17
Just a quick update I just found out the kluger does have its own cooler and it’s not built into the radiator it’s on the passenger side just under the fog light it’s not a bad size I’m wondering if I would need to improve it?
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Follow Up By: qldcamper - Sunday, Dec 24, 2017 at 13:01

Sunday, Dec 24, 2017 at 13:01
Isnt that interesting, Toyota didn't put one on the hilux which is a work horse ( the latest model may have one ) but they put one in the kluger.

Unusual not to have one in the radiator as its second function is to warm the tranny on cold start up.

What are they rated to tow?


Ask a transmission specialist.
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Follow Up By: Johnnykluger - Sunday, Dec 24, 2017 at 16:46

Sunday, Dec 24, 2017 at 16:46
The kluger is rated to tow 2 tonne I’m guessing they put it in there because people would probably be towing at its limits hence transmission failure
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Follow Up By: Dean K3 - Sunday, Dec 24, 2017 at 17:51

Sunday, Dec 24, 2017 at 17:51
QLDcamper - suspect the Hilux would use similar system as Prado has it internal within radiator -could be wrong though, admit be a odd one as a commercial/load bearing vehicle

Try n find out tomorrow rellie is a workshop manager for Mr Toyota
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Follow Up By: qldcamper - Monday, Dec 25, 2017 at 16:12

Monday, Dec 25, 2017 at 16:12
the 2005 to2016 hilux is an internal radiator cooler, most vehicles when you order a tow pack when new they add an extra external cooler which toyota didnt do with mine, or anyone elses.
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Follow Up By: HKB Electronics - Wednesday, Dec 27, 2017 at 11:36

Wednesday, Dec 27, 2017 at 11:36
If it already has a stand alone cooler then you need to monitor the trans temperatures and see if extra cooling is required, or as above have a chat to an auto trans repairer.

You may not need to add and extra cooler, a fan might suffice if not already fitted.

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