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05-10-2013, 06:54 PM
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#1 |
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Registered User
Join Date: Feb 2012
Location: Mission Viejo, CA
Posts: 1,856
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stock transmission cooler
so I flushed my tranny lines yesterday and couldnt quite understand whats going on with the cooler.
The lines go into the main radiator back out and into the trans cooler and then back to the trans. why does it go into the main radiator? |
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05-10-2013, 06:57 PM
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#2 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,921
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Re: stock transmission cooler
Because the engine temps are normally cooler than the tranny temps. So the stock coolers use the radiator. Been that way for many years on many vehicles.
Gary
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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05-10-2013, 07:00 PM
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#3 |
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Registered User
Join Date: Feb 2012
Location: Mission Viejo, CA
Posts: 1,856
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Re: stock transmission cooler
so that line is going back and forth in the radiator before coming out and going through the second air cooled radiator in front of the main rad? Or is that the coils for the AC compressor.
im going over there today ill look at it again. |
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05-10-2013, 07:06 PM
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#4 |
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Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: stock transmission cooler
It sounds like someone has added an external cooler in series to the existing, factory liquid to liquid cooler tube in radiator tank. This helps drop the temp. a lot better than just the radiator mounted tube and takes some heat load off the engine cooling system under extreme conditions. By running the cooler in series it also warms the trans. fluild a little faster during cold weather. "Morning sickness" is common on worn transmission with cold fluid.
The factory trans cooler is just a tube inside one radiator tank. The fluid "in" in the lower fitting and "out" is the upper. If you truck has a trans cooler added it will be fairly small and forward of the A/C condensor which is mounted in front of the radiator. As always a picture would help. But just tracing the trans cooler lines will show if an external cooler is plumbed in or not.
__________________
Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban Last edited by SS Tim; 05-10-2013 at 07:13 PM. |
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05-10-2013, 07:08 PM
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#5 |
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Registered User
Join Date: Feb 2012
Location: Mission Viejo, CA
Posts: 1,856
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Re: stock transmission cooler
ah, this thing had a 5th wheel hitch in it at some point so I bet it was added when they were hauling stuff.
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05-10-2013, 07:38 PM
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#6 |
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Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: stock transmission cooler
There is a flow convention to if you want to check yours against it.
On a TH400 & TH350 the fliud flow is out the lower trans. fitting, in the lower radiator fitting, out the upper radiator fitting, in the upper trans. fitting. When you add a cooler in series it is basically the same. Out the trans lower fitting, in the aux cooler lower fitting, out the aux cooler upper fitting, in the radiator cooler lower fitting, out the radiator cooler upper fitting, in the trans upper fitting. In any installation the idea is to push the fluid up and back to the trans. to purge all air.
__________________
Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban Last edited by SS Tim; 05-10-2013 at 07:45 PM. |
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05-10-2013, 10:30 PM
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#7 |
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I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Re: stock transmission cooler
I'll bet they added it hen they did the 5th wheel hitch or when they rebuilt the tranny after they added it.
__________________
The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" |
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05-10-2013, 10:48 PM
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#8 |
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Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: stock transmission cooler
A liquid to liquid cooler is much more efficient than an air to liquid cooler.
__________________
My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe |
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05-11-2013, 09:48 AM
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#9 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,921
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Re: stock transmission cooler
It is... but the external cooler (in line) is set up with the radiator cooler to help drop the temps even more than the stock cooler. Which really comes in handy when pullin' or haulin' heavy loads.
Gary
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
Quote:
Quote:
Quote:
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