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Howdy. I am considering mounting in my gauge pod an electrical temp gauge. My tranny oil pan Turbo 350 has a drain plug. Would this be a good spot to mount the sending unit? Thanks...JCC1969
 

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No, you really want the gauge in the line that feeds the trans. oil cooler. This will tell you what the temperature of the oil is as it leaves the torque converter, which is what you really need to know. It doesn't really matter that much what the temp in the pan is.

Paul D.
 

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There has been a lot of debate over this one. Mine is in the pan drain plug and seems to read the correct temps as compared to what most say they should be. This plug is in the side of the pan, you wouldn't want to use one in the bottom.
 

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I'm not an expert or anything, but everything I've heard is that the pan is the best place to put the sender. It's the best indicator of how well your cooling system is working. It's a given that the hottest point will be just as it leaves the converter.

Most drain plug kits use 1/8" NPT threads, and, coincidentally, most senders are 1/8" NPT!
 

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As heat is about the only thing that can really hurt an automatic (aside from excessive torque!) it is very important to know the highest operating temperature experienced by the box. Heat beats up the converter, internal seals and o-rings and the clutches.

No one ever puts a water temp gauge sender in the radiator. You put it in the head where you can accurately measure the effects of temperature on engine performance.

Paul D.
 

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May I politely disagree? The problem with measuring the fluid as it leaves the converter is that there is very little you can do about that temp. It is where vitually all heat from an automatic is generated. What you CAN control is the temp as it returns from the cooling system (via larger/better coolers).

If fluid at converter exit temp was circulated throughout the transmission, you'd have big problems - but that really hot fluid goes straight to the cooler. It's the fluid from the pan that is circulated throughout the trans, and that is the temp that you need to monitor.

I did a bit of digging around on this site and found the following from our resident trans expert, Steve Oldani:

http://www.camaros.net/forum/ultimatebb.php?ubb=get_topic;f=18;t=000650#000006
 

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BPOS,

I will bow to you and Steve Oldani I respect your opinions very highly and I'm no expert either!!!


But, I do have reservations. :D If I radically overheat the fluid before it leaves the converter, at a minimum I'm going to run into frequent problems with the front pump/torque converter seal drying out and leaking. A gauge in both spots would give me a lot of information on my torque converter and/or oil cooler efficiency.


I'm also pretty sure that B&M instructs you to put the gauge in the cooler inlet line??

Paul D.
 
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