[rod83]

I recently bought a 2005 frontier SE and i have read a bunch of post talking about the transmission cooler/radiator cross contamination problem. I have searched google and here trying to find what the stock set up looks like but i havent had any luck. I took a look at mine and it seems to already have an aftermarket tranny cooler attached to the radiator, atleast it doesnt seem like the two fluids could cross contaminate with my set up. I took a couple of pictures and was wondering if anyone could tell me if this is stock or after market, because if its stock i need to order one. Thanks

 

[BluJay]

Check out this thread.

http://www.clubfrontier.org/forums/f23/automatic-transmission-radiator-oil-cooler-bypass-42555/

You need to remove the skidplate under your engine, to see the hoses that run from the tranny to the radiator then it exits there and goes to the cooler in your picture, it then returns to the transmission.

 

[Zero Six LE]

That is the stock auxiliary trans oil cooler for the towing package.