I got this buttoned up on the weekend. I followed the cooler line from the TOP of the tranny as my out line. The top line though seemed to go to the top of the rad cooler, not the bottom. I'm not sure though if the lines that are in my truck are the ones for it, since they don't line up all that great to the stock in/out on the rad cooler. In fact I had to use a short section of hose to make them work or else there would have been a lot of strain on the hard lines.
So what I did was got $10 in 3/8" hose and $20 in fittings and adapters. The fittings required to connect to the stock rad cooler are 5/16" inverted flare in case anybody is wondering. The parts store didn't have any 5/16" inv to 3/8" hose barb fittings, so I got a 5/16 to 3/8" adapter, then 3/8" to 3/8" hose barb. All fittings are inverted flare type for good seal. Worked out just fine. I had to plumb though the outlet line from the tranny to the top of the rad cooler instead of the bottom. Not so much of a concern though as that's part of a liquid to liquid heat exchanger, not air to liquid like the outboard B&M cooler. But I do hope that I have the correct outlet from tranny. Everything is operating nicely and no leaks! Made a decent mess for myself doing the job but at least it's done now.
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