I just bought a 2004 silverado 4 wheel drive with the 4l60 trans. It's bone stock with 27k miles on it. I'd like to add a trans cooler and a shift kit to increase the longitivity of my trans. I see some kind of cooler in front of the a/c condensor, is that the trans cooler or engine oil cooler? Is the trans cooler in the radiator like most cars? I plan on keeping this truck as stock as possible. Do you guys think these are good mods to keep the trans running for a while?

 

you factory cooler is that small one you see in front... the shift kit and cooler along with some servos and the proper tune will make it last much longer...

 

 

the proper tune also means dont increase the line pressure in case you didnt know.