Trans Temp sensor 48re

[Snoxracer]

Just wondering where to mount the sensor? I just got my autometer gauge and was wondering on where to mount it. I know that some of you or at least I thought that I saw somewhere on here that there was a place to mount it besides in the pan. Any info on the subject would be great. Thanks again for all of your help!!



Snoxracer

 

[JVolpe]

Mine was installed in the trans to trans cooler replacement line from www.massdiesel.com. The line has a fitting to install the sensor in. Very simple. The hot line to the cooler is suppose to be the most accurate temp reading.



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[Bertram65]

I have mine mounted in the rear port on the transmission. I also have Autometer guages, some of the other brand probes do not fit properly but the Autometer does.

 

[wneubauer]

Mine is in the pan.

 

[Allnew2Me]

I also went through the same thing you are not too long ago. Here is what I gleaned from all the smart members of TDR.

The test ports on the transmission are not an accurate place to take temp from. There is not enough of a flow past them to register quickly or accurately.

The pan is easy but not a good indication of the actual temperature because the fluid has already been cooled and is returned there.

The prefered location is in the line out to the coolers, right out of the transmission. I looked at that but the line is around $90 and I'm cheap .

So here is what I did. I tool a small block of aluminum and drilled a 1/2" hole in it. I then cut the block in half so I had a block with half of a hole about 1 1/2" long. This hole is a perfect mate to my trans line. Then I drilled and tapped a hole perpindicular to the first one to mount the sender so it was just flush with the arch of the hole on the inside. I drilled two small holes to wire it on the line tight, about 2 " from where the line leaves the trans to the cooler. Go to Radio Shack and get a tube of heatsink grease and fill the sender hole before you screw it in for a good heat transfer. I've had this done for about 3 months and it is still working like a dream, The temp comes up with the coolant temp and changes very quickly depending upon the load and whether or not the convertor is locked or not. I can climb a hill and watch it heat up and then go down and just as quickly see it drop.

All in all a good, inexpensive, and more important, accurate place to mount your trans sender.

 

[Bertram65]

There have been a number of people who have had the probes in the test ports then moved them to the pan or installed it with a line fitting and seen the exact same temps and reaction time as when the probe was in the port. The temps on mine go up and down when I get in traffic or slow down and the TC unlocks.

 

[Stefan Kondolay]

There is no politically correct way to say this so let me see if I can explain why installing the gauge in the rear port is not the correct way for measuring oil temps.

A lot of guys are not aware that there is no oil in the pressure port when you are in the drive position. What you are measuring is the temp of the transmission case. People should not use this as a reference for transmission oil temps. Transmission sensors are not for measuring transmission case temperatures, they are for measuring oil. It is true that your transmission gauge will go up and down but it is not the fluid temps causing this, it is the temp fluctuation from the case. The transmission output line is the best place to measure the temps from.

 

[ECappleman]

I don't know if I totally agree with the previous post, but I do know that different ports allow readings in different gears. None do it in all gears and none of the ports do a reverse reading.

 

[FPettijohn]

what the hey? Why do you think they call it the pressure port? It checks the valve body pressure in all gears so it must flow FLUID in all gears except park which does not turn the front pump!!

 

[cdenn]

Transmission prob

I used a westech prob thats goes down my dip stick works great

 

[Matt400]

I tool a small block of aluminum and drilled a 1/2" hole in it. I then cut the block in half so I had a block with half of a hole about 1 1/2" long. This hole is a perfect mate to my trans line. Then I drilled and tapped a hole perpindicular to the first one to mount the sender so it was just flush with the arch of the hole on the inside. I drilled two small holes to wire it on the line tight, about 2 " from where the line leaves the trans to the cooler. Go to Radio Shack and get a tube of heatsink grease and fill the sender hole before you screw it in for a good heat transfer.

Interesting idea, so you didn't even tap into the line but simply use the heatsink grease for transfer. You could make a kit for sale with the 2 halves taped so they could be screwed together along with a small tube of grease.

 

[Allnew2Me]

Matt, no I didn't tap into the line at all, just made sure the tip of the sender was tight against it and sealed it with the heatsink grease. I did it originally as an expreiment to see how it would work, and when I found out it did I made a more precise block. So far so good.

 

[Snoxracer]

Man this is awesome!!! Thanks guys!! This is what I love about this site, so many good ideas and answers. When I first looked at the pictures, I hadn't a clue to what I was looking at because I hadn't even looked under my truck. Then I read ALLNEW2ME's post on how he made a clamp to go over the half inch line I thought to myself. Oh? This thing has 1/2 inch lines? Well excellent because I have these really cool compression fittings, that have a double ferrule, that are for 1/2 inch stainless steel tubing, are all stainless and good for pressures above 350psi. So I proceeded to find me a Tee fitting and I cut the bottom part of the Tee off, cut a 1/2 inch stainless steel pipe coupling in half and tig welded it to the Tee. So now all I have to do is cut a part of the line out with a tubing cutter, install my fitting and I should be in business! So it will basicly be just like the massdiesel one but homemade! And I plan on installing it in the same locating as that one. Once agian THANK YOU all for all of you input and great help!!!



Thanks,



Snoxracer

Dustin

 

[Stefan Kondolay]

The key word here is pressure ports. They do not flow oil, the oil dead ends at the pressure ports. It is like putting a temp sensor at the end of your hot water faucet rather than at the actual tank. You wont get a very accurate reading because the water will always read cooler at the tap rather ran if you took it right from the outline of the hot water tank.



The transmission oil pump continues to pump oil as long as your engine is running. It does not matter what gear selection the transmission is in, it still continues to pump oil. The transmission oil pump is a mechanical device, it is attached mechanically to your TC. The torque converter is bolted to your flex plate, your flex plate is bolted to your crankshaft, and as long as the engine is turning the transmission oil pump is pumping oil. Obviously people can put them wherever they want to but some of you may not be aware that the differences between measuring from the transmission cooler line and the transmission pressure ports can be as high as 150 degrees so it is an important decision .

 

[ECappleman]

what the hey? Why do you think they call it the pressure port? It checks the valve body pressure in all gears so it must flow FLUID in all gears except park which does not turn the front pump!!

You must of not done much research.

Hmmmm..... wonder why there are so many test ports?



Also if you have used the ports and then bought one of the Mass Diesel lines, you would not make that statement.

Please do some reading.

 

[Allnew2Me]

Snoxracer, I'm glad you were inspired! Had I had your access to such fittings, I would have done what you did. My method works well and solved my problem of where to place it, but having the sender in the fluid itself is a better solution to be sure. Good luck

 

[Snoxracer]

Just finished installing my trans temp sensor and gauge. I used my fitting that I made and it worked perfect. I removed the line from the heat exchanger and pluged with some rubber vacuum plugs. Then clamped the rubber part (hose) to keep fluid from running out while I cut the tube. I had to remove about an inch of tubing to make up for what the fitting took up. Then slid the fitting over the tubing and tightened, started the truck and checked for any leaks!! NONE!! So then I finished installing the guage into my pilar mount for an SRT-10. I got the Autometer NV gauge, but after hooking it up I am not sure if I like the green color. But anyway I haven't drove it yet, just started it and idle in gear to see if all works and it seems to respond quickly. It came up to about 140 degrees in gear after just a few minutes and then quickly dropped when I put in park. Once again thanks for all your help!!!



Snoxracer

 

[Matt400]

I thought to myself. Oh? This thing has 1/2 inch lines? Well excellent because I have these really cool compression fittings

There is not allot of pressure on that line so even a standard compression fitting should do fine, I can't seem to find a 1/2" compression "T" that has 1/8 female npt on one end, whats up with that?

 

[KennethS]

This Is the best I have read so far GREAT

I had a 87 Holiday Rambler 36 footer with a 454 Chevy and automatic. I had a trans temp gauge Installed. They put It In the trans oil pan. It never seam to work as I though It should. First I did not like the gauge. I now have a Dodge Scotty 25 footer Motor Home with a Cummings Diesel and automatic trans. It a 1995 and runs super. But I want to put a temp gauge on the trans. This should be standard equipment with a automatic trans. from the factory. In my words Its a must. Plus done correct so you know what going on. If you are going to pull heavy weight what else Is there to say. Best Investment you can make.

 

[Snoxracer]

MATT400, I took a stainless steel compression fitting tee and cut off the one compression nut and threads and tig welded a stainless pipe fitting to it. I turned out really good, works excellent,plus it was pretty easy to install, and it was cheap for me.

I haven't hauled anything with it yet but drove it a couple hundred miles yesterday. It averages about 140-150 driving down the highway at 75 mph, no load, but when you start out from a stop or pull a good hill I saw it up to about 190. That was the most I saw and it responds almost instantly. I think that it will be a good investment.



Thanks,

Snoxracer