Hi all After doing some research on here regarding the heat exchange for the zf transmission failing I was convinced to purchase the PWR one and fit when I service the box. I spoke to the local tranny guy today and he recomended not to go for the PWR one and just fit a heavy duty one as the PWR one will yes stop a milk shake happening but cooling wise not much better than the standard one and reckons there sh*t when it comes to cooling. He only uses genuine oil and said he sells it for $37.50lt bottle or can sevice supply & fit genuine metal pan ,filter, oil, cooler and braided line for $950 what are your thoughts guys