Engine/Transmission (1994 - 1998) Transmisson temp probe location

[Sandmancw]

I know this has been talked about before, alot, but can not find info any in my search.

People talk about using the first or second test port. Where are these located at? I know it is on the passenger side, but where? If any one has pictures of location this would be greatly appreciated. Already have EGT and Pyro up and working.

Thanks,

Carsten

 

[klaybus]

Trans Temp Sending Unit Location

Put it in the line going to the heat exchanger. The line is available for about $100 at DC. Or go to www.dieseltrans.com



Clay

 

[bmoeller]

Using the test port on the transmission is for the 47RH trannys, not the 47RE that you have.



The DC p/n for the cooler line is 5011244AA. You will need to remove the check ball and spring in the new line. It is not needed on yours.

 

[Sandmancw]

I do have 47RH transmission aaccording to the sticker on the inside of the hood on my 95.

 

[bmoeller]

Sorry, didn't read the rest of your sig. Was assuming the '01 since you didn't specify which truck. You will have to use one of the test ports. The cooler line you have already has the line with the port for a sender. It is used with the factory sender.

 

[illflem]

I use the middle test port, passenger side for my temp gauge as recommended by Bill K, works great.

As said this is only for '94-'96 with the RH transmission.

 

[Sandmancw]

I am fairly ignorant but trying to learn, where exactly do I find the test ports? I know they are on the passenger side but where? In the engine compartment or underneath the truck? All my friends have manual transmissions, so aren't a lot of help.

Thanks Again for all the help,

Carsten

 

[bmoeller]

They are 1/8" pipe plugs. They take a 7/16" wrench if I remember right.

 

[DBCooper]

The ports are on the right side of the trans about half way back and half way up. I believe there are three lined up in a row front to back. Can't miss em.

 

[ronco]

I went thru this same problem last week on my truck. The test port (second from front) does not seem to have a pipe thread that is equivalent to what my Auto Meter gauge sending unit has. As I tried to thread the sending unit into the trans. housing, it stopped after one revolution by hand. I put the wrench on the sending unit and after one more revolution, the sending unit popped out and had some of the thread from the trans. on it. I was not crossing the threads either. I ended up using the supplied bushing and installing the Auto Meter sending unit in place of the factory sending unit. Anyone had that happed to them? I am now worried that the bushing is covering too much of the sending unit, and my gauge is not quick to react to changes in fluid temp. Which leads me to a question? What kind of fluid temp should I see when riding down the interstate at 70 unloaded? Thanks.







Ronco

 

[illflem]

I've installed a few there, it's for sure pipe thread.

I'm just wondering what you did with the factory sender, your trans won't operate correctly without it, namely it won't shift into od unless the sensor is seeing 70°

 

[ronco]

illflem, I did my homework there with a resistor. I don't doubt the test port is a pipe thread, but it does not seem compatible with my auxiliary sending unit for the gauge.





Ronco

 

[Howard Durand]

I went a different route.

The first time I did my own transmission service, I cut two holes in the pan and welded in a boss and plug for a drain and another boss threaded for 1/4" pipe for a temperature sender.

You have to be careful with the temperature sender location that it doesn't interfere with anything inside the pan.

If you want to spend the money, get a Mag Hytec pan that already has both a drain plug and a temperature sender port.

 

[Cooker]

Originally posted by illflem

I use the middle test port, passenger side for my temp gauge as recommended by Bill K, works great.

As said this is only for '94-'96 with the RH transmission.

I would assume this port can be used on the 47re trannies as well? Does anybody know for sure?

 

[illflem]

answered by an expert

Don't think the RE has a middle port, there are only two

Originally posted by Stefan Kondolay

Scheibins,



As Bill is fond of saying in this shop , nothing in this world is free.



In our shop there are 2 ways and only 2 ways to install a transmission temp gauge. One is the Chrysler cross over line part #5011244AA or the transmission pan.



If the customer does a lot of city driving or heavy towing we put it in the line, while we prefer to do so in all cases as it serves as a early warning system as it is measuring the transmission oil at its hottest point as it is coming out of the tc, it can also be put in the pan. Again,whenever possible we prefer the outline but the pan is also the other place it can be put.



One thing to note, when we install the crossover line from Chrysler we throw away the little rubber piece and install a custom stainless braided line in its place as the rubber one has been know to burst.



Oh, back to free, the front test port as Bill has shown us is about as useless of a place to use as a temp port as your glove box. He has shown us customer trucks that have done this and the transmissions have been melted inside and the customer has been puzzled as his temps never went over 160 degrees.



As it was explained to us , the front test port is your 2nd gear release, in other words there is no oil in that pressure port unless you are in 3rd gear on in od. As most TDR members will tell you that have temp gauges in are their hottest temps are when they are backing up their trailers or when they are in stop and go traffic.



In first gear , 2nd gear and reverse, there is no oil in that test port so as your transmission is building its highest temperatures your gauge gets the lowest readings if you installed the gauge in the front test port.



This is one of Bills biggest pet peeves, he finds it incomprehensible that professional shops do this on a regular basis,40% of the burnt up transmissions that we see come to us with this temp sensor in the front port that is how wide spread this done. They do it because its quick and easy money and they obviously don't know any better. As for using compression fittings, DO NOT use compression fittings on aluminum lines, that is a recipe for disaster. A diesel engine vibrates and so do your cooler lines,the fittings do come loose with time .

 

[bmoeller]

Originally posted by Cooker

I would assume this port can be used on the 47re trannies as well? Does anybody know for sure?

No, tried it before getting the '95 line.

 

[OaborbaG]

I have a 99 and i see 3 ports on the right side of the transmission, i'm attempting to put it in the middle one for now, and then get the tc line will that work for now?