The only thing you have to buy is about an extra 5ft of hose. Maybe some more hoseclamps. and a small pipe cutter if you don't have one. (Make sure its small, a big one is not needed nor will it fit) Now, if you got the kit i told you about, you should have gotten a plastic bag with a bunch of odds and ends in it. Assuming you have a '94-'97 mn12...
Look at the top fittings on the oem trans cooler. Unscrew the first fitting after the (top) hardline. Pull the hardline out. In the bag, find the barbed fitting that will screw directly into the same place as the fitting you just unscrewed. Attach a 11/32 (comes with kit, 3/8 hose will also work, the dimensions are very similar) hose to the barbed end, along with a hose clamp. Run that hose to the aux. cooler. Now get under the car slightly. You should be able to find both the feed and return lines. Make sure that you have a hold of the return line, and and about in the middle, cut it. Pull out the hardline you just cut, and attach another hose to the remaining line. Put two or three hose clamps on, just to make sure leaks are prevented, and run the remaining end to the cooler. Figure out a good place for it (justinh's place is a very good place). Check your trans fluid (refer to the the owners manual for the proper way) and fill it as need. You will need about a quart, maybe more. Im installing a new one for my new trans today (can't use the other one, gots crap in it!) and i plan on taking pictures and maybe writing a little article, the one currently on this site was very confusing to me, but maybe i'll make it worse.
