2010 ranger 5r55e temperature?

[Wingit]

Hey guys, longtime lurker and first time poster. My scanner is showing a temperature of 110c (230f) after 40min of slow but steep mountain driving at 80deg. Is this within expected temps, or an indicator of something wrong? She has 220k miles on her, hence the concern of a malfunction. The engine itself runs warm too under such circumstances, so maybe insufficient coolant flow to the trans cooler?

The transmission fluid seems to be slightly overfilled too, maybe 3/8in over hash marks. How much volume is indicated by the distance between the two holes on the dipstick? Trying to gauge how much to siphon.

I apologize for the potentially naive questions, this is the first vehicle I've ever purchased and I'm learning a great deal.

 

[Blmpkn]

230 is right at the ragged edge of what's acceptable. Its at 240 that atf will start to leave a varnish and things just get worse from there..

Temps like that are yeah.. probably pretty expected though considering what you described. The trans cooler IS the radiator so.. both fluids will have influence on the temperature of the other to an extent.

Start with this.

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[Uncle Gump]

Typically between full and add on a transmission dip stick it one pint. If it is a little over the full mark and not leaking or blowing out the vent... shifts properly and fluid isnt foamy on the stick... I don't think I'd worry about it.

My 06 4x4 auto came with an external trans cooler. Yours may already have one.

Does it run cooler with less mountainous conditions?

 

[sgtsandman]

Hey guys, longtime lurker and first time poster. My scanner is showing a temperature of 110c (230f) after 40min of slow but steep mountain driving at 80deg. Is this within expected temps, or an indicator of something wrong? She has 220k miles on her, hence the concern of a malfunction. The engine itself runs warm too under such circumstances, so maybe insufficient coolant flow to the trans cooler?

The transmission fluid seems to be slightly overfilled too, maybe 3/8in over hash marks. How much volume is indicated by the distance between the two holes on the dipstick? Trying to gauge how much to siphon.

I apologize for the potentially naive questions, this is the first vehicle I've ever purchased and I'm learning a great deal.

First on fluid level. Are you checking the flyid with the engine running? If so, then you will need to remove some fluid. If not, that is why it is reading high.

On the temperature, like mentioned, 230 is on the fringe of starting to cook. The best way to install an auxiliary cooler is to run the pressure line to the aux cooler first and then from the aux cooler to the factory cooler. The return line connects to the outlet of the factory cooler.

The reason for this is that the oem cooler will leach heat from the engine coolant, warming up the transmission faster.

It will also prevent the aux cooler from over cooling the transmission by warming the fluid back up.

In some vehicles, this is important. If the system checks transmission temp and the temp is too cold, it will keep the engine running in warm up mode. Which will eventually ruin emissions equipment.

I don't think the pre-2019 Rangers are that sofisticated but it is a good practice to get into because of other vehicles you may have in the future and it really isn't good for the transmission to be running to cool all the time anyway. They operate most efficiently within a certain temperature range.