Radiator and Trans Coolant replace or fix? also a inconsistent throttle respinse

2011 2500, 273K miles
I have a leak coming from the brass fittings where the trans fluid enters the radiator. the upper one is a super slow wheap and the lower one I can see drips form. The radiator is missing a few mounting points so it is a bit loose as well. Im thinking of replacing the radiator and trans lines.

First, Any special tools needed? 2nd, is there a step by step resource? 3rd, any tips and tricks?

Anybody have a link to where to get these parts? What else should i replace while im in there.

Video would be super helpful.

And on a different note, I am having some surging issue under low throttle. It feels like I am feathering the throttle but I am not. When I look at the vehicle on a scanner I

Thanks J
 

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