Transmission Oil Operating Temperature

[M1Tanker]

This may be in the owner's manual, but what is the correct operating temperature for the transmission oil?

 

Mine is around 185 degrees and I can recall my 2010 only being around 115 degrees.

[MNDaveC]

190. Same as coolant thermostat.

 

 

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[20L8TSierra24]

190. Same as coolant thermostat.

 

 

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+1^^ towing slightly more

[GMC-AT]

It' been covered many times..anything under 200 is normal for these trucks.

[M1Tanker]

Thank you.