I have coolant leaking from auto trans inspection cover. Have checked every place I can see including small 90 hose behind turbo, heater hoses and all the freeze plugs (I can see) and I can not locate where it is coming from? Every place on the back of the engine appears dry? It's out of warr so any ideas before I take it in? Thanks.

 

Have you checked the liquid-liquid heat exchanger behind the fuel filter?

 

Just figured it out. The water pump. Fluid was running all the way around the top of the pan to the rear of the engine.