I just installed an autometer guage. On my way home my guage read 225 steady in the sleet and rain @ 70 mph. I know this is'nt the average temp for a 99 V-10. I installed the sender in the test port above pan. Before I even left the garage I was testing it out by letting the truck idle for a while. I got a reading of 180 before hitting any pavement. Any suggestion. Last week I replaced the filter and fluid w/syn. mobil 1ATF.

 

Do you have the digital odometer or the analog 'roll-over'?? If you've got the digital, there's a poor-mans trans temp readout you can access. .post back if you do!

 

NO, I've got an analog odometer

 

Tell me more! You mean there is a way to get the trans temp from the odometer???

 

Not sure about the 225 degrees, but the 180 is normal I would think.

If your tranny lines go to the radiator for cooling, the coolant is running about 180/185 degrees, so of course, the tranny fluid will warm up to 180 or thereabouts after ilding for a while.

Even if you have a seperate tranny cooler, it is behind the radiator (usually) and you would get about 180 degrees too.

The thermostat should be 185 degrees (mine is in an '01), the tranny running 40 degrees higher than that sounds a little high. Especially on the highway with no load, the torque converter should be in lock-up, so there isn't much heat being generated inside the tranny.

Guys? (and gals?)

 

You can only get the trans temp from the odo if you've got the digital dash.

While the truck is off, hold down the 'trip' stalk on the gauge cluster. Keep holding the stalk, turn the truck to 'on', but don't crank it over. Still holding down the stalk, wait a few seconds until the display will read "TEST", you can go ahead and start the truck.

From what I've gathered, you can check the true RPM's, the coolant temp in celsius, and the trans temp in fahrenheit. I still haven't figured out what all the other readings are for.

Back to the trans temp, push the 'trip' stalk to scroll through the different readouts, theres a whole bunch of them. I think the trans temp readout is one or two after the RPM. xxxxRPM, xxxC, then xxxTF. The TF readout is your trans temp. If you pass it up, just keep pushing the stalk, it will loop back to the beginning.

To get rid of the display, shut off your truck and restart.

I'm trying to compare my trucks info to info I'm getting off of E-250 vans since the newer ones have two rows in the display, and show "Trans Tmp" or "Oil Press" above the reading.

 

I've also got an autometer tranny gauge, its an electric, in the same port as "immaculate", mine will read around 110 for general running around, but on long freeway hauls it will go to 150. When pulling my 31' trailer in the winter it reads 180, I imagine in the summer it'll be 200 and above and I'll be installing a forced air tranny cooler, these is just my read outs, I hope it helps you.

 

What year did they start putting in the external tranny cooler for the SD with the V10? I know for '01, I was suprised to see mine had it... is it a towing option, or something?

 

I believe it is the towing option, what I am going to add is an external unit that is one unit with a positive and negative wire, it has its own radiator and electric fan, an internal thermostat automatically starts the fan at your preset temp. Its a real clean package that mounts under the truck.

 

Sounds to me like you have a indication problem. I 've had a tranny temp gauge for 3 years and have never seen temps over 185 even towing a 7000 pound travel trailer in the dead heat of summer. Make sure your gauge has a good ground. Also did you use "sensor safe" thread sealer when you installed the sending unit ? I would go back and check my grounds and connections before i did anything else.

Mark

 

That is too high in any case. I would buy an aftermarket pan with a port that is the fluid rather that above it.Either that or remove your pan and weld in a bung down low and mount the sensor in the fluid. I believe that you would get a more accurate reading.