Boiling point: How much can your diesel auto trans handle?

I for one am happy that I got a 68RFE that I am able to custom tune to my preferences and add more power without the the torque management nerfing it.

Tranie temps are always around 170F for what I tow and the added tunning helped with long life by increasing/decreasing line pressure at the right time.

It is so reliable that in about 10k more miles, I will be able to say I didn't even need a warranty with ZERO issues.