Normal Transmission Operating Temp?

[2003kingranch]

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

[7.3550Duty]

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

[SickStroke6.0]

Normal temps are anywhere from 150-165*.

[smokersteve]

180 normal driving is high.

Even in high heat (100*f-120*f) I see 180 as its peak for normal driving under 55mph.

[adambomb]

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?

[artsamm]

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[bismic]

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.

[SickStroke6.0]

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?

[SixStringMadness]

"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.

[PGreenSVT]

Mine runs in the 160-165 range all day long.