This post isn't Y-Block specific but, is worth making a mental note of. Recently, info came to me about Radiator integral transmission cooler failures. Apparently Nissan's Pathfinders of vintage 2006-7 & possibly other years,are prone to having the integral trans cooler fail at relatively low mileage, usually of course just after the warranty runs out! If the problem is not caught almost immediately, the coolant takes the entire transmission out. Apparently the problem is so prevalent, that searches for good used ones are often fruitless. And to have one totally rebuilt costs thousands of $$s. The best price a friend of mine could get for a 2006, was $7300 before tax + a radiator replacement!.. My old 57 has had a seperate cooler installed, I once questioned why that decision was made, but I don't now!.. I wonder how many other cars are prone to these intregal cooler failures?

Paul