2nd Gen Non-Engine/Transmission Trans temp probe install

[KKeen]

Installing gauges. Autometer, egt, boost, trans temp. Been searching past posts. Wow, Tons of helpfull info. My question is on trans temp probe location. I've read pro's and con's on pan, and cooler line locations.

I've only seen one reply about using one of the plugs on the passenger side of the transmission, preferably the one closest to the dipstick. I believe someone called it a pressure test port. Does anyone know if there is room in that port for a temp sender without interfering with flow are any moving parts.

Any advice would be appreciated. Thanks

 

[RonaldLarson]

Temp

Mine is located in the transmission cooler line which takes the fluid to the cooler. The line from Dodge has a built in fitting to accomodate the sensor. This is a good place since the temp reading is at the warmest spot. Piece of cake to install.

Ron

 

[rweis]

Don't know that I would put it in the transmission body ports. I have read a couple of threads that the temp sensed in the transmission ports really has nothing to do with the real operating temperature. The transmission ports are pressure ports. There are a couple of transmission websites and that would be a good place to ask specific port questions. I think I remember that someone had the temp in a transmission port and what was really being sampled was not a flow at all, but an occasional dribble that had nothing to do with internal temps. There was also something that there were moving parts really close to the inside side of the port and was lucky that internals were not damaged by the sensor pickup.



I am NOT a transmission expert to ANY means, just passing on things I think I remember reading.



Bob Weis

 

[KKeen]

Thanks guys for your input. I figured if there were ports to be used in the transmission that would work, this site would have info on it. The 95 trucks used the line, so I would assume they did there homework and thats the way to go.

Too bad they did away with the fitting. Guess not enough people opted for the gauge as an option. Well I just thought I could save the cost of the line. I'll be ordering it tomorrow, thanks to the p/n supplied by this site. Thanks for your feedback.

 

[illflem]

The port, middle one to be exact, on the transmission should only be used on the RH trans, '94- '95. transmission cooler line is the best place for yours.

 

[Clinton]

not in the pan...

When I put on a Mag-Hytec pan this Fall, I moved mine from the cooler line to the pan just for experimental sake. In the line I would see average temps around 175* and was able to see it go up on long grades or under heavy loads. In the pan its always a cool 100* - 110*. I never see temps fluctuate at all. I will be moving it back to where it was as soon as I'm in the neighborhood and have a few minutes. So... not in the pan if you want numbers you can use.

 

[Big-D]

Temp Probe

Installed my temperature probe into the out-put line from the transmission to the cooler today. In doing so I got to wondering about how far the probe should stick into the line for correct sensing.



My sensor has a 3/8 NPT, but the line fitting is 1/2 NPT, thus causing the need for a reducer. By using the reducer it causes the sensor to be "held back" from penetrating the center of the fluid line itself.



Question ~ Will accurate temperature sensing be restricted by having the sensor end held back from the main flow of fluid?



Looking forward to the expert ruling on this matter, of which I am not.

Dave

 

[RonaldLarson]

Probe

I don't think you would want the probe protruding into the flow.

This would obstruct fluid flow. The vortex around the probe tip should be as accurate as need be. Yes, I had to reduce mine from 1/2 to 3/8 also. My average temp as shown on my X Monitor is 120-140 with the winter front closed 90%, ambient air around 20 degrees.

Ron

 

[KKeen]

Hey guys, just installed my new transmission line last night. You were right it was rather painless and fit perfect. The dealer had trouble looking up the part for me Lucky for me you guys had the p/n.

I also wondered about the probe not going in very far, but it should contact the fluid all around. No test drive yet waiting for my boost gauge from Genos, back ordered gauge pod fits real well. Thanks for your help.

 

[sag2]

I first installed the sensor in the test port on my motor home (ford C6). It seemed to register high most of the time. I then moved it to the pan, and the temp is much more stable and lower most of the time. Pulling hard still gets the fluid pretty hot (225) but without a lock up converter they will create lots of heat.