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Old 03-19-2008, 11:53 AM
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trans temp?

how hot should my tranny run on my 04? unloaded and pulling 12-16k?
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Old 03-19-2008, 01:31 PM
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Once my truck warms up I run about 150-160 degrees. I am not sure about when towing heavy loads yet.
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Old 03-19-2008, 01:34 PM
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Generally its 60-80 degrees over outside ambient temps unloaded. Loaded depends but you want it to be 200 or under. The less heat the longer life of the trans
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Old 03-19-2008, 02:19 PM
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I've had 13k behind mine and never got over 175 towing on level 4 with the 6 Gun.
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Old 03-19-2008, 03:32 PM
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Contrary to what the aftermarket vendors will tell you and popular belief, the torqshift with Mercon SP is fine up to 230*. This is according to Mark Kovalesky who was a Ford transmission engineer from 1988 until 2007 and worked on the 5R110 extensively.
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Old 03-19-2008, 03:39 PM
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True it might be okay to 230, but running it to the max will shorten the life of a trans. The best advise I can give ya pistolpete is heat is always bad for a trans the less you can generate with synthetic fluids, coolers, and trans tuning for less slippage the longer the trans will last.
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Old 03-20-2008, 12:07 AM
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The light comes on at 230 degrees.

215 degrees is probably a comfortable maximum from what I have been told.
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Old 03-20-2008, 07:40 AM
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thanks for the info. with spring coming around both of my truck will have to work alittle harder than they have over the winter.
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