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Transmission Temp 2004 Expedition

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Old Jan 30, 2008 | 08:53 PM
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Transmission Temp 2004 Expedition

Does anyone know the safe operating temperature range for a 4R70W transmission?
 
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Old Jan 31, 2008 | 06:14 AM
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Typical operating range is 140-200F. Actual temperature is highly variable and depends on your operating conditions. Typical readings at highway cruising under mild conditions should read around 160-180F.

I wouldn't worry about it unless you're seeing temps over 220F. If you do frequent heavy hauling, I'd suggest measures to keep it under 200F. Over-sized cooler, auxiliary cooler fan, etc.

Steve
 
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