Originally Posted by outback_ute
Johnydep you also forgot to mention that water is not a very good lubricant for you auto trans...
It's always a risk when having trans coolers in the rad tank, you are better off with an external cooler.
I thought the same thing, but have since learned that the in-tank cooler is also a heater.
The transmission requires quick warm up to minimise wear & stabilize gear changes.
The AWD & the RWD with HD tow pack come standard with an external cooler, but the in-tank cooler is still used for the above reason.
Other manufacturers use the same idea with no problems.
I have been told that poor quality material can only be blamed for this problem, it either ruptures through fatigue or the oil becomes corrosive & attacks the metal which is usually brass.