r4100 tranny? - Ford Powerstroke Diesel Forum
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Old 04-30-2013, 09:02 AM
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r4100 tranny?

What is the normal operating temp for a r4100. Mine is running right at 180 when driven about 20 miles unloaded.
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Old 04-30-2013, 09:03 AM
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Quote:
Originally Posted by kentuckypowerstroke03 View Post
What is the normal operating temp for a r4100. Mine is running right at 180 when driven about 20 miles unloaded.
Sorry I ment a 4r100
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Old 04-30-2013, 09:12 AM
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These transmissions operate pretty hot due to the factory cooler being too small for the application. Do a search on upgraded coolers, I installed one that was off the shelf at O'reilly Auto; dropped my temps 40-50 degrees even when towing. I don't like to see anything over 190 personally.
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Old 04-30-2013, 09:19 AM
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Well, I put an aftermarket cooler on mine made by torque flow. I left the old one in there and just put the new one in front of the condenser.
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Old 04-30-2013, 09:26 AM
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You may need to drop the pan and do a flush, filter, re-fill. I have my temp sensor in the inspection port at the pan and it doesn't get above 180 even when its 105 out and I am in stop-go traffic. Sounds to me like you might a restriction somewhere.
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Old 04-30-2013, 04:36 PM
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Sounds like your tranny cooler could be restricted stop at a trans shop and they can tell you how much its flowing if its clogged and not flowing enough its a slow death for your trans. Don't just add another cooler and think thats going to help its probably your cooler.
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Old 05-01-2013, 02:48 AM
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180* is design operating temperature. Don't really need to worry until you start to go over 210*-220* with today's materials & fluids. Some of the "charts" floating around out there are from the 60's and obsolete. When you say you left the old one in do you mean in the loop or just sitting there? If they are both hooked up in series it may be too much restriction.
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Old 05-01-2013, 04:03 AM
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Mine has not gotten over 150*, I have installed the 6.0L cooler and trashed the tiny little wimpy stock cooler
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Old 05-01-2013, 04:57 AM
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Which reminds me - whenn I am home I need to hit the salvage yard for another 6.0 Cooler, this time for MY truck. I've gotten 2 for my dad's and friend's trucks - before I owned an auto. But being that summer is coming, and my trans is only about a yr old I better get a bigger cooler on her soon.
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