Transmission Temperatures

[DCP]

I just installed a transmission oil temperature gage in a Ford 250 SuperDuty with diesel and 5 speed auto transmission. The temperature seems low (150), when just driving in town. What temperatures are some of you guys getting with your trucks?

[Fordzilla]

I have some new gauges from Quadzilla I should have installed within the week. But My old 7.3 F250 would run between 140-175 all day long when towing. The gauge spent a lot of time down around 140-150 but I remember seeing it get up to near 175 once pulling a longer grade and never had any problems with it.

[Broome101]

My F350 stays around 135-145 degrees empty. Pulling around 155-170 degrees. My old F250 2001 would get up toward 180-199 towing.

[lightningjack11]

I have an Autometer probe on mine. I find my temp goes up on real hot days and it goes down on cooler ones. When towing it is usually below 175-180 although it has approached 200 on some hills during the summer. I was told previously that if you ever got up to 210 or more you should consider stopping and changing the fluid. So far so good for me. Sometimes when I get about 185 I will just stop and take a break to allow cooldown. I feel it is better to do that than take a chance blowing the tranny.

[ols1932]

A lot depends on where your sensor is. It will register hotter when it comes off the torque converter. If it is installed in the output of the oil cooler it will be much cooler. Mine is in the wrong spot. It's tied into the cooler return line and I'm going to get it moved to where it gives me the actual temp coming off the transmission. Incidentally, I just added a "deep pan" to my tranny. Gives me somewhere between 6 to 8 quarts more of oil in the tranny. Did this because of another tranny failure which I believe was due entirely to shoddy workmanship on a previous rebuild.

Orv

[Trailer Trash 2]

quote:Originally posted by ols1932

A lot depends on where your sensor is. It will register hotter when it comes off the torque converter. If it is installed in the output of the oil cooler it will be much cooler. Mine is in the wrong spot. It's tied into the cooler return line and I'm going to get it moved to where it gives me the actual temp coming off the transmission. Incidentally, I just added a "deep pan" to my tranny. Gives me somewhere between 6 to 8 quarts more of oil in the tranny. Did this because of another tranny failure which I believe was due entirely to shoddy workmanship on a previous rebuild.

Orv

Orv: where did you get the bigger oil pan and did it come with alonger pickup tube or was that extra.

TT2

[lightningjack11]

On the EO4D there is a test plug on the drivers side of the transmission. That is where I installed my Autometer sensor.

[ols1932]

quote:Originally posted by Trailer Trash 2

Orv: where did you get the bigger oil pan and did it come with alonger pickup tube or was that extra.

TT2

TT2
When my tranny failed a couple weeks ago, I picked up the deeper pan from a shop in Salem, OR. But you can get them from almost any parts store. If they don't have them they can get one in a jiffy.

The reason I had it put on was as a preventive measure. I was having difficulty with previous shoddy workmanship in tranny overhauls and a deeper pan was recommended by several members of thedieselstop.com website.

Orv

[lightningjack11]

Just happen to have a link for pans.

http://www.drivetrain.com/transmissionpans.html

Never ordered anything from them.

[sreigle]

DCP,I agree it makes a difference where the sender is located. On our 2003 F350 with the torqshift transmission the sender was in the pan. The temperature showed cooler there and even towing on a hot day up a long grade it never got above about 180. This one has the same transmission but the sender is in the oil line going from transmission to cooler and is a couple of inches outside the transmission. So it is measuring the oil at its hottest. Around town solo 150 is not at all uncommon, even on a hot day. Towing on a hot day and it will run 165 to 180 on the flat. Up long steep grades it may climb to 195 or on a hot day up closer to 210 if you're holding speed up a long grade on a hot day. I saw 230 once on mine but backed off the throttle a couple miles per hour and it came back down.