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Old 01-02-2011, 06:42 PM
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Normal Transmission Operating Temp?

i have a 2003 f-250 6.0L automatic 4X4 ( im not sure the trans number )

any way i had my SCT X3 tuner plugged in displaying trans temp, it always runs about 184 to 188(not pulling a trailer) is this normal temp?

never had a 6.0 so im all new to this. thanks for the help
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Old 01-02-2011, 06:52 PM
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Well if it was me, i would go out and get yourself a set of gauges n not depend on them tuner outputs, get sumthing that you know of for sure and that you can count on. I have 01 7.3 and my tranny temps barely get above 125 when it was 80 degrees out goin down the road at 65 empty
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Old 01-02-2011, 07:03 PM
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Normal temps are anywhere from 150-165*.
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Old 01-02-2011, 07:49 PM
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180 normal driving is high.

Even in high heat (100*f-120*f) I see 180 as its peak for normal driving under 55mph.
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Old 01-02-2011, 11:53 PM
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like the other guys are saying the temps sounds high. my truck on a Autometer gauge (once up to OT) runs 160-165 and stays right about there all day long. does it run that high in stock tuning?
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Old 01-03-2011, 01:51 AM
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Old 01-03-2011, 02:48 AM
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Seems high to me based on what I see w/ my truck, but temps in the 180 *F range are not a problem.

Your fluid and tranny seals are good for 300*F for short durations. Not that this is adviseable, but shows how robust the tranny is.

I consider 150 - 195 as good. IMO, anything over 220 continuosly would be a problem.

BTW - The tow/haul light will flash at 275 *F.
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Old 01-03-2011, 05:56 AM
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If it tells you anything, the highest I've ever seen is 179*, and that was pulling 12,000 pounds in 5 'o clock bumper-to-bumper traffic.

When was the last time the transmission was flushed?
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Old 01-03-2011, 06:07 AM
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"Normal" is a variable all it's own I think. 180 F won't hurt the clutches or bands, BUT, it will shorten the life of the transmission over time. My friend has a lightning, the puts 450hp to the pavement, and his temps never seem to rise above 135 F, and he doesn't pussy foot this thing either. I had an OBS tuned and injected that would generally run 160, but would push 200 for no reason, and at 170k I had got the dreaded flashing OD light. (slipping Over Drive gear) The goal for a long lasting trans should be 160 or lower, but 180 is not an immediate concern in my opinion, but I would address at some point.

Bottom line, temps below 160 will easily see their transmission exceed 150k miles, where 180 might not make 150k. So it's not an immediate issue, but over the life could cause you to buy a transmission sooner than someone with cooler temps.
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Old 01-03-2011, 08:44 AM
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Mine runs in the 160-165 range all day long.
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