Tranny Thermostat Question

[Bluefire16]

So im installing a tranny temp gauge on my A/T gst.....and i know which line to tap into except when i went to the hardware store to pick up a few parts to make the blocker i ran into this problem. Either it looks like the sender gauge will block too much or the fluid wont reach it.... Ill best show my problem in a picture...

This is it, installed right into the 3 way brass piece, you can see there inst much room for fluid to flow and idk if thats going to be ok?:

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Second is the other way, if i use an extension, but the problem is now it sits so bloody far away:

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What do you guys think? Will it be ok with the first one? Should i just loosen it a little and use some plumbers tape to seal it?

 

[Colt4G63 also]

Take off the pan, and weld a threaded bung into the pan. After all, you want the temp of the fluid in the pan, not the fluid that's about to be/or just has been cooled right?

 

[Bluefire16]

....i dont want to tap into the pan, that just makes a mess and leads to leaks. This is the way everyone does it with A/T's....but no it will be fine in the line. You install it into the line closet to the firewall. This line is the line of the coolant going to the tranny cooler, this way you get the reading of the hottest your tranny is, before its cooled.

Ok so i installed it, i tightened down a good amount and then threaded it with thread sealnt tape... and it seemed pretty snug and still had a good amount of room to flow. So i put it in let the car warm up and went for a drive, it only got up to about 155, and i only took it on a 5 min drive, but it seems to be working. And the weather is really cold here today, rainy and 64*F.....

Oh and does anyone no the operating range temps? I have no clue?

Oh and for others i put mine on the "return line" which i am to believe after reading dozens of other threads the line on the transmission CLOSEST to the firewall....

 

[GDNF2ET]

Oh and for others i put mine on the "return line" which i am to believe after reading dozens of other threads the line on the transmission CLOSEST to the firewall....

That is correct, closest to the firewall is the return...

I think you shoulda bought the IPT fitting..If your tranny burns up from the sender blocking too much flow or from the sensor being too far away from the fluid to be accurate, it would not be worth it..If you duplicated it exactly, that would be different..

The pan is the best place for the sensor..Mine will be there one day..

Operating temp depends on trans cooler size & locations, fluid type, converter stall. Under 180 would be very good.....

 

[Flash]

....i dont want to tap into the pan, that just makes a mess and leads to leaks. This is the way everyone does it with A/T's....but no it will be fine in the line. You install it into the line closet to the firewall. This line is the line of the coolant going to the tranny cooler, this way you get the reading of the hottest your tranny is, before its cooled.

Ok so i installed it, i tightened down a good amount and then threaded it with thread sealnt tape... and it seemed pretty snug and still had a good amount of room to flow. So i put it in let the car warm up and went for a drive, it only got up to about 155, and i only took it on a 5 min drive, but it seems to be working. And the weather is really cold here today, rainy and 64*F.....

Oh and does anyone no the operating range temps? I have no clue?

Oh and for others i put mine on the "return line" which i am to believe after reading dozens of other threads the line on the transmission CLOSEST to the firewall....

I once had an auto. What makes you think it will leak at the pan. I actually think it is a great suggestion to put it in the pan. Have a bung welded on and thread it in. If your welds are nice and you tighten the sensor then I know it won't leak. It would also be out of the way compared to running a 't' off an existing line.

 

[rbwtrans]

If you have it plumbed into the return line then the only actual reading you are getting would be the "cooled" fluid temp. IMO the only thing this would really be good for is measuring the amount of heat soak your cooler is producing. I know it sounds like a Pain, but to truely measure your tranny temps you are either going to have to put it into the cooler feed line or the pan. Why do you think the factory trans temp sensor is bolted to the valve body and not the cooler?

 

[Bender]

The pan is the best spot, but the return line will give you a bunch of different temperatures to compare yours to.

As for the sending unit, you need a 3/8" brass tee, then use 3/8" barbs, and a 3/8"-1/8" reducer to fit the sending unit.

 

[motomattxxx]

Why dont someone figure out what the stock trans sensor resistance is at different temperatures and then we can tap into the wire and build a gauge to display the trans temperature from the factory sensor, say we use a narrow band 0-5v cheapo O2 display?...no sense in adding any fittings at all since the factory already has a temperature sensor in the pan.