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Old 08-11-2009, 09:25 PM
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Trans temp

Finally got my optix gauges hooked up and went for a 400 mile trip today.
My trans is running 190 to 200 on mostly flat ground, unloaded. The trans and converter were rebuilt about 5k ago.
The temp today was about 85 and the truck has the radiator cooler as well as a trucool add on. The stock add on has been bypassed.
That seems a little high to me. Any help?
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Old 08-12-2009, 06:23 AM
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i run about 140 flat, unloaded. no cooling mods yet.
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Old 08-12-2009, 06:52 AM
wriott
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yeah seems kinda high for being unloaded... anything blocking air to the coolers??
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Old 08-12-2009, 07:20 AM
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Cooler is clean and no air flow obstruction.
I have read the cooler bypass can cause high temps if it opens too easily or sticks open.
The cooler I have has it's own bypass valve so I am thinking I could block off the by pass at the transmission.
Anyone tried this before?
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Old 08-12-2009, 08:14 AM
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[QUOTE=bbboomer;1347123]Cooler is clean and no air flow obstruction.
I have read the cooler bypass can cause high temps if it opens too easily or sticks open.
The cooler I have has it's own bypass valve so I am thinking I could block off the by pass at the transmission.
Anyone tried this before?[/QUO


The stock return fluid provides lube to a bushing, this bypass was added to insure when the stock cooler plugged, lubrication would still be provided.

The first thing I would do is have it scanned for any trans codes to make sure the TC clutch is not slipping, then flow test the cooler return.
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Old 08-12-2009, 04:35 PM
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I think that is my next plan but I will reverse it and do the cooler flow test first.
I don't have access to an OBII scanner so I will do the free checks first.
Thanks for the help.
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Old 08-13-2009, 06:28 AM
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Trans temps should not get any hotter then about 80 degrees above what it is out side.
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