Transmission question?. - Ford Powerstroke Diesel Forum

 
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post #1 of 4 Old 05-31-2013, 02:05 PM Thread Starter
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Transmission question?.

Hello, I would like to know on my Early99 F350 7.3L with the automatic transmission, does transmission fluid flow through the transmission oil cooler constantly? Or does the fluid only go to the cooler at a certain temperature? I have a transmission temperature gauge and I am in the process of adding a transmission fluid cooler. I was driving today the transmission temperature was at about 180*, I felt the transmission lines running to the radiator and neither of them was warm. I am wondering if I don't have any fluid flowing through the cooler or if it is normal until the transmission reaches a specific temperature.
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post #2 of 4 Old 07-07-2013, 06:16 AM
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The 4R100 does have a cooler bypass. Can't find the temp specs for it though.

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post #3 of 4 Old 07-17-2013, 06:46 PM
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Quote:
Originally Posted by natureboynate47 View Post
The 4R100 does have a cooler bypass. Can't find the temp specs for it though.
Yep, flows all the time.

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post #4 of 4 Old 07-18-2013, 07:31 AM
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If I remember correctly, Mark K said that the bypass is simply to prevent the tranny from not getting fluid if the cooler gets blocked. It doesn't aid in warmups/cool down of the fluid/transmission.

I could be wrong, but you may want to search under his name. You'll find plenty of good info about the transmission.

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