E40D temps... - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 01-20-2014, 05:10 PM Thread Starter
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E40D temps...

whats the normal operating temp for the E40D , and how long does it usually take to get to operating temp? , its about 60* out right now and was driving around town and temp never went over 140 but would also drop a hair then go back up , its a EV2 gauge , thought something was wrong going down the road cause the marker would somewhat flicker a hair but while it wwas rising through the temps , this normal?


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post #2 of 5 Old 01-20-2014, 06:19 PM

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When I was in so cal I usually read between 160-200, normal at 180*

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post #3 of 5 Old 01-23-2014, 04:25 AM
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Ambient air temperature and load on the transmission make a difference. AT 60F ambient with light load on the transmission, a reading of 140F sounds reasonable to me.

One could expect that as the ambient temperature and load on the transmission rise, so do the transmission temperatures. I've seen 220F or a bit above while towing a trailer in hot weather. If it ever got much higher than that, I would install a larger transmission oil cooler.

As to why the gauge might flicker while rising is anybody's guess. It's possibly just the way the gauge behaves by design as it moves through its function. Or it could indicate a fault of one sort or another.
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post #4 of 5 Old 01-23-2014, 04:00 PM
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With ambient air temp at 60*, 140* trans temp is normal. That is about what I see on my 4R100 as well.

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post #5 of 5 Old 01-25-2014, 05:02 PM
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Mine reads 140 when not towing.

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