Location for 48RE Transmission Temperature Probe?

[HBarlow]

I haven't unpacked the box of new goodies from Genos yet. The MagHytec pan may have a dimple or even a plug where the probe should be mounted but I don't think I've heard that it does from anyone who owns one.



Would someone who has installed one please tell me where specifically the new MagHytec deep transmission pan should be drilled to install the transmission temperature probe?



I've read that probe location is important for obtaining the most accurate reading. I read a discussion by Bill Kondalay on the DTT website a couple of months ago regarding the difference in oil temperatures that can be found in various locations. Bill stressed the importance of installing the temp probe in the correct location but I didn't find any photos or sketches to make it clear where he suggested the probe should be.



Harvey

 

[fox]

It should be in the outlet that goes to the coolers.



It is best to read it where it will be the max. This is right after the converter.

Some have put it in a test port, but this is stagnant flow and is misleading. More likely to read case temperature.

The pan would be my next choice.

 

[HBarlow]

fox:



Thanks for the prompt reply and suggestion.



I'm clueless here. Can you be a little more specific? How exactly do I install the temp probe in the outlet to the cooler?



Harvey

 

[Cactus Roper]

The transmission cooler temp line for 3rd gen is a custom line you can get from Mass Diesel 1-508-660-7093. This works well and is an easy install. The second choice is the pan. However transmission pan placement is not recommended for guys towing heavy or off road guys

 

[john3976]

Buy the MassDiesel line, great company, great product.



I had the probe in the test port on the right side and after installing the MassDiesel line I now see that I was measuring the case temps and not the fluid temps.



The best $90. 00 you will spend on your truck.

 

[HBarlow]

Thanks to each of you who provided info. I'll call MassDiesel for the fluid line as you suggested. I wish I'd asked the question sooner. I'm off the road at home this week to get the new truck outfitted and probably won't have time to get the cooler line. Maybe if I call early tomorrow and ask them to ASAP it.



A probe and temp guage wouldn't do much good if it's not actually sampling the fluid where it is hottest.



Harvey

 

[Benson]

The Mag Hytek pan has a 1/8 inch NPT port on the rear side of the pan. I'd just use that.

 

[RankRam]

Buy the MassDiesel line, great company, great product.



The best $90. 00 you will spend on your truck.

Thanks for posting the price for their line, I have been wondering how much it was.



I couldn't see it on their website thanks again.

 

[john3976]

The price I posted was with standard UPS shipping, the line is 80 dollars, I don't know how much over night or second day shipping would cost.



MassDiesel treated me very well, I would do business with them any time.

 

[puller]

I purchased a line from Mass Diesel, the first line leaked and I could not get it to stop. They sent me a new line no questions asked GREAT company. The one problem that I see with the product is the 1/8 opening for the temp probe it does not allow the probe to sit in the flow of fluid. I am looking into another fitting that has a larger hole so the probe tip can sit in the fluid flow just enough to "feel" the fluid but not restrict it.



Puller

 

[milehigh.o.]

go to this link http://www.tdr1.com/forums/showthread.php?t=136712&highlight=TRANS+TEMP



Search is a wonderful option.

 

[Smokin Joes 2500]

However transmission pan placement is not recommended for guys towing heavy or off road guys[/QUOTE]





WHY NOT????

 

[Bertram65]

It should be in the outlet that goes to the coolers.



It is best to read it where it will be the max. This is right after the converter.

Some have put it in a test port, but this is stagnant flow and is misleading. More likely to read case temperature.

The pan would be my next choice.

Have you actually ran a probe in the test port? I have had the probe in one of the test ports as well as in the pan, the port is actually faster responding and shows a wider range of temps.

 

[Parks]

I have always put them in the pan. Never had a problem. Why would that not be a good location?

 

[john3976]

Have you actually ran a probe in the test port? I have had the probe in one of the test ports as well as in the pan, the port is actually faster responding and shows a wider range of temps.

I had mine in the test port on the right side and while it worked it is clear that after I put the MassDiesel line on all I was measuring in the test port was the transmission case temp not the fluid temp.



Now my trans temp gauge really gives me good temp readings and they are much different then the test port reading I was getting.



I can now watch the fluid temp go up and down and the gauge reacts much faster in the line vs being in the test port.

 

[HBarlow]

Thanks for all the replies, advice, and good discussion. I called Mass Diesel early this morning and ordered the replacement cooling line with temp gauge probe fitting.



After reading the replies here to my question I was armed with a better understanding of the issue. I returned to the DTT website and realized that Bill Kondolay recommends the identical solution.



Harvey

 

[ECappleman]

I have always put them in the pan. Never had a problem. Why would that not be a good location?

That is oil that has already been cooled by the transmission cooler.

 

[Edgemann55]

So if it is in the pan just use a lower temp for your warning,much like a egt probe pre or post turbo.

 

[ECappleman]

So if it is in the pan just use a lower temp for your warning,much like a egt probe pre or post turbo.

The problem with that though is there are too many variables. Mainly outside temps. The transmission cooler/radiator cools differently (or efficiently) as the temps change.

These outside temps do not affect the readings on the Mass Diesel inline temp sensor. Since there is only about 10" of line between it and the outbound transmission line.

 

[puller]

I finally found a fitting at a hydraulic skid loader place. It allows you to mount the fitting in place of the Mass Diesel fitting and the temp probe just does touch the fluid as it flows by. Also I noticed that the temp now reads about 20 drgrees higher than with the standard Mass Diesel fitting. If anyone is interested I can give you the numbers or supply you with the fitting.



Puller