UR opinion, extra transmission cooler..
I pulled the grill on my (5.3 Liter, 4L60e transmission) Suburban to install an oil cooler and there's a factory oil cooler mounted behind the grill already. I traced the line from the return side of...
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bgum wrote:
Sure it's not a AC cooler?
It's definitely a factory auxiliary transmission oil cooler. The condenser is a great big thing and, this vehicle has a power steering oil cooler as well, OEM. I think I will leave it alone. The transmission runs cool, as far as I can tell, no problems with it and I keep fresh Dex-6 in it. I ground down the factory drain plug, that rounds off and works for no one, and welded an 11/16 nut to the plug. Now doing a simple drain and fill of the transmission takes 5 minutes.
