V6 (1994-2004) Mustangs Technical discussions on the 3.8L and 3.9L V6 torque monsters

operating temps.

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Old 03-06-2011, 11:14 AM
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8lug
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Question operating temps.

What are the normal operating temps with the engine coolant and transmission fluid ?
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Old 03-06-2011, 08:16 PM
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NeoTokyo
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Our stock T-Stats are 193 degree's and 200-210 is about the right operating temp if I remember right.
The T-Stat is fully open at 221 degree's I have read.

I am not 100% sure but I think trans fluid temps for the 4R70W is suppose to be between 160-175 or so and peak around 190-200 depending on conditions.
If you run it really hard then you could spike much higher (250+) and possibly run into killing the trans.

There are several cooling kits out there to help cool it.

Last edited by NeoTokyo; 03-06-2011 at 08:21 PM.
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Old 03-06-2011, 09:32 PM
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8lug
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About what I thought thanks Neo Tokyo.
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Old 03-06-2011, 10:20 PM
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Any time.
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