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Just spoke with an '04 SSR owner in Lake Havasu, AZ where it is 125 degrees farenheit on the pavement. He was concerned his SSR was running at 235 degrees and his tranny at around 215.
He took an actual temp reading of both and found the engine at around 210 and the tranny at around 175.
Now either his SSR gages are bad or Chevy built in the dummy factor in the computer to keep us from overheating our SSR's, but he believes we are not running as hot as we think we are. He was about to move the tranny cooler to the rear when he discovered this and is now holding off until he can check his gages.
My '05 runs at around 195-215 in 100 degree weather while idling or hwy speeds. I do not have a tranny gage so that is a mystery to me.

Hey JimG and everyone else, what do you think? Any truth to this possibility? Anyone else taken actual temps? :confused :cool
 

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How in the world did your friend "measure the temperature" of the transmission? I hope NOT by putting a temp sensor or a temperature gun on the housing!

The FLUID temperature is what is critical in a transmission.

And I don't even want to THINK abiut how he thought he was taking a readng of the engine coolant temperature in a pressurized system, and doing it INSIDE the engine block!

When my auxiliary transmission temperature guage registered about 240 after a series of street test acceleration runs, Reese at MTI Racing actually hooked up the EFILive diagnostic software to my PCM and we compared the reading from that to the reading on the auxiliary temperature guage. By the time we got hooked up, the auxiliary guage had fallen to about 230, but the diagnostic software gave EXACTLY the same reading: 230.

Now, BOTH these readings come from the PCM, which gets them from the temperature sensor in the transmission, so they SHOULD be the same. But, the whole point of this test was to see if the NEEDLE reading on the auxiliary guage is accurate or inflated. It is accurate.

Jim G
 

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Discussion Starter · #4 ·
JimGnitecki said:
How in the world did your friend "measure the temperature" of the transmission? I hope NOT by putting a temp sensor or a temperature gun on the housing!

The FLUID temperature is what is critical in a transmission.

And I don't even want to THINK abiut how he thought he was taking a readng of the engine coolant temperature in a pressurized system, and doing it INSIDE the engine block!

When my auxiliary transmission temperature guage registered about 240 after a series of street test acceleration runs, Reese at MTI Racing actually hooked up the EFILive diagnostic software to my PCM and we compared the reading from that to the reading on the auxiliary temperature guage. By the time we got hooked up, the auxiliary guage had fallen to about 230, but the diagnostic software gave EXACTLY the same reading: 230.

Now, BOTH these readings come from the PCM, which gets them from the temperature sensor in the transmission, so they SHOULD be the same. But, the whole point of this test was to see if the NEEDLE reading on the auxiliary guage is accurate or inflated. It is accurate.

Jim G
That's a good question Jim. He is into racing cars and commented on how he was able to reroute to lines to get a reading. I didn't get into detail with him. He's not a friend, this was the first time I spoke with him but I found his findings interesting nonetheless and curious as well.
 

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JimGnitecki said:
How in the world did your friend "measure the temperature" of the transmission? I hope NOT by putting a temp sensor or a temperature gun on the housing!

The FLUID temperature is what is critical in a transmission.

And I don't even want to THINK abiut how he thought he was taking a readng of the engine coolant temperature in a pressurized system, and doing it INSIDE the engine block!

When my auxiliary transmission temperature guage registered about 240 after a series of street test acceleration runs, Reese at MTI Racing actually hooked up the EFILive diagnostic software to my PCM and we compared the reading from that to the reading on the auxiliary temperature guage. By the time we got hooked up, the auxiliary guage had fallen to about 230, but the diagnostic software gave EXACTLY the same reading: 230.

Now, BOTH these readings come from the PCM, which gets them from the temperature sensor in the transmission, so they SHOULD be the same. But, the whole point of this test was to see if the NEEDLE reading on the auxiliary guage is accurate or inflated. It is accurate.

Jim G
I would expect the aux guage to read the same as what the PCM reports. The guages in the cluster are digital readouts that use a needle to report the output.
 
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