jt_2002_ta

iTrader: (3)

Just curious whats normal and safe for big stalled th400 ' s

mrvedit

I think this applies to all transmissions:
http://www.txchange.com/heatchrt.jpg

You definitely want to keep it under 225F.
In a previous thread there was no consensus on the minimum operating temperature, but it is somewhere in the 140F to 175F range depending upon different opinions.