transmission cooler

I started putting in a Hayden tranny cooler on my 2008 Yukon with a 4L60E and ran into some questions and concerns. 1. I already made one mistake... I unscrewed the nut holding the OE trans cooler line into the radiator (the lower line) and when I did, antifreeze drained from the system. I...

I'm finding bits and pieces all over the net, but not a definitive answer to a few questions I have regarding the prep I'll require to get my 1995 5.7L 2 door Yukon up to handling about an 8,000lbs all told, trailer. Questions for the panel: Do I have a 3:73 or 4:1 read end? (I can't find...