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Trans Temp Sensor Location
#922272
02/06/11 02:12 PM
02/06/11 02:12 PM
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Joined: Jan 2005
Posts: 866
Winnipeg ,Mb. CA.
chryco
OP
super stock
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OP
super stock
Joined: Jan 2005
Posts: 866
Winnipeg ,Mb. CA.
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Where`s the best location for a trans temp sensor ?
Last edited by chryco; 02/06/11 02:16 PM.
Gas is fer washin' parts ....Alky`s fer drinkin' ...Nitro`s fer Racin'!
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Re: Trans Temp Sensor Location
[Re: chryco]
#922274
02/06/11 02:21 PM
02/06/11 02:21 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I'm putting them in the pan now days... I had it in the output (going to the cooler) and got fed up watching the temp gauge go up and down all the time... I'm talking BIG swings 
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Re: Trans Temp Sensor Location
[Re: chryco]
#922277
02/06/11 03:25 PM
02/06/11 03:25 PM
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Joined: Jan 2003
Posts: 16,934
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,934
NC
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There is no "best" location.
Each location tells you something different.
1) The output line to the cooler tells you the hottest fluid and is a concern to the converter and fluid breakdown. Also it changes quickly, giving you more warning of what is happening.
2) The trans pan tells you the bulk temperature of the transmission. It is a combination of fluid draining off the internal parts, valve body, clutches, servos discharge, etc. It is also sent to the valve body and converter via the pump. It is fairly slow to react/change.
3) The return line from the cooler tells you the temperature the trans is being lubricated with, before it picks up heat from inside the trans.
I like to know the hottest the fuild gets. Converters can be damaged due to excessive heat (on the trans brake, foot braking, etc). But the bulk temperature is nice to know also.
It is interesting to see what happens in various circumstances. One such is when the entire system was hot and the car turned off. If the air is cold, the fluid trapped in the pan and cooler will drop, but the fluid trapped in the hot converter, near the hot block; stays hot for much longer. So when you start it up, the trans looks cool, but then heats quicker than expected because the hot converter fluid starts circulating through the system. Another is at the end of the 1/4 mile in a drag race. The fluid/converter is very hot and that is a real concern, and you won't know it looking at the pan temperature.
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Re: Trans Temp Sensor Location
[Re: chryco]
#922278
02/06/11 03:30 PM
02/06/11 03:30 PM
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Joined: Jan 2003
Posts: 26,032
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 26,032
Rio Linda, CA
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If you're an information freak (like me) you can place multiple sensors and hook them to the gauge through a multi-position rotary switch. That way you can read the temp at several locations.
The INTERNET, the MISinformation superhighway
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Re: Trans Temp Sensor Location
[Re: chryco]
#922279
02/06/11 03:33 PM
02/06/11 03:33 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
I'm putting them in the pan now days... I had it in
the output (going to the cooler) and got fed up watching
the temp gauge go up and down all the time... I'm
talking BIG swings
Drain Plug fitting should work , right ?
I dont use the drain plug on my own junk... I put a
fitting on the rear of the pan(or any place thats
out of the way)... when I was setting up test cars
for our road trips(Chrysler road trips) we used the
drain plugs because it was easier to use them but
in some cases it would be fairly low and might have
had a issue if it was a low type race car
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Re: Trans Temp Sensor Location
[Re: John_Kunkel]
#922280
02/06/11 03:34 PM
02/06/11 03:34 PM
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Joined: Jan 2003
Posts: 16,934
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,934
NC
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Quote:
If you're an information freak (like me) you can place multiple sensors and hook them to the gauge through a multi-position rotary switch. That way you can read the temp at several locations.
That is a good idea with electrical sensors. I have a two way switch for my one temp gauge used with a sensor in the output line to the cooler, and a sensor in the engine oil pan. A rotary switch with 3 or more positions could be used to add other temps.  
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