2001 F150 Screw - 5.4 towing pkg.

The highest temp I've seen since installing the ScanGaugeII (2 weeks) has been 145*. That was mostly highway driving - short trip of 50 miles.

I am not complaining, and expect it pick-up some in the summer. I guess the reading depends on where the signal comes from (before or after the coolers). I have no idea where the sensor that feeds the OBDII port is?

Thanks,

 

FWIW, viewing on my Edge my 5.4 tow package auto runs 175 avg...

 

my trans oil temp normally runs around 145 in town, 155 to 165 on the highway and 170 ish while 4wheeling... highest i've ever seen mine was around 210... i have my temp sensor in the pan...

i just have a standard cheap mechanical guage from autozone...

 

Running down the highway at 70, mine stays around 155.

 

Thanks for offering your numbers. It seems I'm in range - I think I recall reading the in the owner manual (in the checking trnny fluid section) that normal temps are 150 > 170. I am sure many things affect temps - ir: outside temp, terrain, pulling or hauling etc..

Thanks again,

 

The temp sensor the OBD-II reads is in the valve body. It runs about 10-15 degrees hotter than the sensor in the pan (a DD Mag-Hytec that holds 4 extra quarts and has a sensor bung)

 

Reading the temp from the valve body sounds like a good place to get real idea of how things are getting along.

Good info. Jim

 

Yesterday it was 98* outside and I was cruising down the highway not hauling anything or towing and mine got up to 204* going up a hill then stayed arround 195* the rest of the trip, is this normal or is something wrong?

 

I saw a slight increase yesrterday, as the out temp was in the upper 80's. Same 50 mile trip, I usually run. Tranny temp bounced between 148 > 151.

Clearly, I am no expert - but, your temps seem sort of high. Understanding that these "newer" vehicles are designed to run at higher temps - not like the good old days : )

It maybe normal pulling some of those hill in KY. I am used to the flat TX gulf coast area.

Hopefully, some will have some more input.

 

That is about the difference I'm seeing also. I have an Autometer gauge with the sensor in the pan that reads about 10-15 lower than the readings form my Scangauge.

I run about 180 during the summer in around town driving, and about 150 during the winter. Those are off the Autometer gauge. I just installed the SG a couple of days ago.

 

Anywhere from 60-100F above ambient is normal. You're fine.

 

It gets hotter uphill because the converter may unlock some or all of the time. You wanna see the trans get really hot, disable the converter lockup and cruise around for a while. Anyway, that sounds normal to me and about what my truck does in similar circumstances.

Incidentally, one thing I found with another truck was that gear ratio and tire size had a lot to do with trans temp.

IIRC, with 3.08 axle ratios, the truck picked up 30 degrees by going from 235/75R15 tires to 31x10.50 tires, mostly because the bigger tires had the effect of an even taller gear ratio (less mechanical advantage) and made the trans work hard (the converter slips more). When I installed 4.10s, the trans temps dropped some 40 degrees (the converter slipped less because the new gearing lessened the load via more mechanical advantage). I actually dropped below the stock temps.

 

Interesting article on ATF cooling. http://www.roscommonequipmentcenter....notes/nn15.pdf

EDIT: IMHO I prefer the temp sensor in the feed line before the coolers. I don't care if the coolers are doing a good job. I want to know that the oil temp
coming out of the transmission is not too hot. It doesn't matter if the oil is cooled back down to a safe temperature if it is coming out of the transmission burnt.


.