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09-12-2013, 11:06 AM
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#1
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Rivet Master
Join Date: Mar 2003
Posts: 2,190
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Help...transmission cooler
I knew my old 2000 1500 van needed a trans cooler. My trailer weighs about 3000 lbs.
My mechanic says my new to me 2009 2500 van has a built in trans cooler and that I probably don't need one. I haven't been towing during the heat of the day until I get a cooler. Is he right about not needing one?
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09-12-2013, 11:19 AM
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#2
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Moderator
2017 26' Flying Cloud
Alamo Heights
, Texas
Join Date: Aug 2006
Posts: 8,534
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*IF* your van has a factory towing package, it should have a decent transmission cooler. Monitor transmission temps (I use a ScanGaugeII for this purpose) and see if they stay in a good range. If not, you may need a bigger/better cooler. Either way, if you buy a ScanGauge or similar device to monitor the temps, you have a nice geektoy to monitor various aspects of an ODB-II vehicle's operation.
__________________
— David
Zero Gravitas — 2017 Flying Cloud 26U | WBCCI# 15566
He has all of the virtues I dislike and none of the vices I admire. — Sir Winston Churchill
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09-12-2013, 11:25 AM
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#3
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Rivet Master
2014 31' Classic
2015 23' International
2013 25' FB International
Apache Junction
, Arizona
Join Date: Sep 2012
Posts: 6,223
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If transmission cooler is external to the engine cooling radiator, then it may have the capacity to keep transmission fluid relatively cool even if engine is getting hotter due to loads on climbs.
__________________
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic w/ twin beds, 50 amp service, 1000 watt solar system, Centramatics, Tuson TPMS, 12" disc brakes, 16" tires & wheels
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09-12-2013, 12:05 PM
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#4
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Rivet Master
Join Date: Mar 2003
Posts: 2,190
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Nope
no tow package and the cooler is part of the radiator
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09-12-2013, 12:21 PM
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#5
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Moderator
2017 26' Flying Cloud
Alamo Heights
, Texas
Join Date: Aug 2006
Posts: 8,534
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Quote:
Originally Posted by mandolindave
no tow package and the cooler is part of the radiator
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If it were mine and I planned to keep it for long, I'd add an external cooler.
__________________
— David
Zero Gravitas — 2017 Flying Cloud 26U | WBCCI# 15566
He has all of the virtues I dislike and none of the vices I admire. — Sir Winston Churchill
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09-12-2013, 12:49 PM
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#6
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 20,000
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Quote:
Originally Posted by mandolindave
I knew my old 2000 1500 van needed a trans cooler. My trailer weighs about 3000 lbs.
My mechanic says my new to me 2009 2500 van has a built in trans cooler and that I probably don't need one. I haven't been towing during the heat of the day until I get a cooler. Is he right about not needing one?
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Dave,
2500 Chevy van right? Does it have a Tranny temp gauge?
If so you have the factory towing package with transmission cooler.
The powertrain control module has a limp mode if the trans overheats, sustained temps over 280 if I remember right.
If you don't have the tow package then an external cooler and gauge would be a very good idea.
You can get a gauge with an external spin-on filter also. I had one on our 95 Burb....the extra fluid capacity helps a little with temps also.
Bob
__________________
I’m done with ‘adulting’…Let’s go find Bigfoot.
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09-12-2013, 01:14 PM
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#7
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Moderator
2004 30' Classic Slideout
Fenton
, Missouri
Join Date: Mar 2002
Posts: 10,410
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In 2003 the factory towing package on the 3/4 ton (2500) GMC van provided an external cooler. You should be able to see it in front of the radiator if you have one. Unfortunately a gauge was not available
I remember adding an external cooler on my 1999 Chevy 1500.
Jack
__________________
Jack Canavera
STL Mo.
AIR #56 S/OS#15
'04 Classic 30' S.O.,'03 GMC Savana 2500
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09-12-2013, 01:14 PM
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#8
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Rivet Master
1977 23' Safari
Niagara on the Lake
, Ontario
Join Date: Aug 2011
Posts: 984
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Almost all vehicles with an automatic transmission have a transmission cooler built in to the radiator. The only vehicle I have ever seen without this is a friends 1957 Chevy.
The cooler in the rad is NOT sufficient for heavy towing. On many vehicles the factory towing package includes a secondary cooler - looks like a small radiator in front of the engine radiator.
Transmission coolers are not expensive, and not expensive to install. Transmissions are expensive!
Anyone towing should invest in a good transmission cooler if their vehicle is not equipped with a separate cooler from the factory.
__________________
1977 Safari Land Yacht
2005 Toyota Tundra SR5
2022 Toyota 4Runner SR5
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09-12-2013, 01:27 PM
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#9
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Moderator
2004 30' Classic Slideout
Fenton
, Missouri
Join Date: Mar 2002
Posts: 10,410
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Quote:
Originally Posted by AldeanFan
Almost all vehicles with an automatic transmission have a transmission cooler built in to the radiator. The only vehicle I have ever seen without this is a friends 1957 Chevy.
The cooler in the rad is NOT sufficient for heavy towing. On many vehicles the factory towing package includes a secondary cooler - looks like a small radiator in front of the engine radiator.
Transmission coolers are not expensive, and not expensive to install. Transmissions are expensive!
Anyone towing should invest in a good transmission cooler if their vehicle is not equipped with a separate cooler from the factory.
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Just remember if you install one yourself be sure to hook the intake of your external cooler to the outlet of the in built cooler in the radiator. Hooking up in reverse will cause your cooled transmission oil to be reheated by the radiator.
Jack
__________________
Jack Canavera
STL Mo.
AIR #56 S/OS#15
'04 Classic 30' S.O.,'03 GMC Savana 2500
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