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26-11-2009
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No Winching
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Join Date: Jan 2008
Location: N.S.W.
Posts: 2,958 What Jeep do I drive?: XJ
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Liked 71 Times in 41 Posts
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XJ Transmission Oil Coolers
This thread includes a thread started by chrisXJ which we had merged to keep similiar info together and save some search time.
In addition to the info posted in this thread .... there is also a collection of threadlinks a few posts further down.
As there is lots of thoughts on whys, why nots, sizes, line routing, bypassing stuff, cooler before heater, cooler after heater etc etc .....
How about a collection of info in the one thread including links to past threads and posts on oil coolers.
I'll start with this ......
The red and blue colours denote coolant temps,
The long thin pipes are the tranny line connections.
Last edited by carvesdodo; 03-02-2011 at 01:14 PM.
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27-11-2009
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Full Flexer
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Join Date: Oct 2009
Location: Sunraysia
Posts: 960 What Jeep do I drive?: XJ
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See... there's more to a vehicle conversion than simply swapping the steering gear to the other side!
Going by that pictorial display, the US version's auto fluids are "exchanging heat" in the coolest section of the radiator whereas, the Oz variant is trying to "exchange heat" in the hottest section surrounded by the engine coolant straight out of a hot motor... that's been well though out eh?
In a nut shell... if the coolant surrounding the transmission oil "heat exchanger" is at a higher temperature there can be NO reduction in transmission oil temperature, thus an external aftermarket transmission cooler should be considered a "must have" item for a vehicle getting lots of use in a multitude of weather/driving conditions, the ONLY benefit I can see with this configuration is a quicker warm up period for the transmission
Last edited by tazwegion; 01-12-2009 at 05:20 PM.
Reason: cleaning up for sticky status
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27-11-2009
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MonsterMoose
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Join Date: Nov 2003
Location: Brisbane, Southside
Age: 51
Posts: 10,539 What Jeep do I drive?: WK2
Likes: 369
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Quote:
Originally Posted by carvesdodo
As there is lots of thoughts on whys, why nots, sizes, line routing, bypassing stuff, cooler before heater, cooler after heater etc etc .....
How about a collection of info in the one thread including links to past threads and posts on oil coolers.
I'll start with this.
The red and blue colours denote coolant temps,
The long thin pipes are the tranny line connections.
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Very interesting there Carves....
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JJ
Do it once, Do it right!
2014 WK2 Overland
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28-11-2009
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CrawlerStar
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Join Date: May 2007
Location: Cairns QLD
Posts: 415 What Jeep do I drive?: XJ
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Got a new cooler on the way but when routing it should the radiator be bypassed altogether? i was origionally going to still use the radiator and flick the old cooler but now wondering if its better to run the coolers in series and bypass the rad altogether? Thoughts anybody? my head hurts?
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28-11-2009
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AJOR Bronze
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Join Date: Sep 2006
Location: adelaide hills
Age: 60
Posts: 1,891 What Jeep do I drive?: XJ
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Great idea for a thread! I've added it to the XJ modifications sticky under "Oil coolers"
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28-11-2009
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No Winching
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Join Date: Jan 2008
Location: N.S.W.
Posts: 2,958 What Jeep do I drive?: XJ
Likes: 19
Liked 71 Times in 41 Posts
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Quote:
Originally Posted by two dogs
Got a new cooler on the way but when routing it should the radiator be bypassed altogether? i was origionally going to still use the radiator and flick the old cooler but now wondering if its better to run the coolers in series and bypass the rad altogether? Thoughts anybody? my head hurts?
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Just my opinion .... but you need a gauge so you can see whats happening now ... and what happens after you make changes.
Factory stated "normal" temps are 50'c - 80'c ... Im getting average 75'c temps with two crappy factory aux coolers bodged together and the radiator bypassed.
Its only a temporary keep it on the road set-up ... and doesnt perform well in overdrive - on hills or towing ... Overdrive of course, is not the gear to be using in those conditions
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I hate watching simplicity and reliability being ruined by bureaucracy and technology.
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