I don't know what it's made of. But there's a guy on ebay selling Steel braided hose with fitting for the tranny cooler aplication. Ask him what it's made of.
Mean time here are a couple sights I have found. And a clip from a former blog.
Here is the blog " :salut: "
(Hi Norm,
For your cooling lines, 6AN fittings and hoses would work well. I would recommend the braided hose over conventional rubber. Rubber hose clamps can sometimes be pesky as far as leaks and drips go. I've also seen racers lose a round of racing because they had a rubber tranny cooling line pop off. On the fittings that go into the case, make sure you get the 1/8"NPT (pipe thread) on one end with the 6AN male end on the other.
Running your cooling lines to the radiator and then to an additional cooler is a good idea. If you build a new tranny you may want to incorporate a gauge with the sending unit in the pan to monitor your transmission fluid temperature, and get an idea of how adequate your transmission cooling system is.
Chris
I use ATF+4 in my cars, which is Chrysler's newest transmission fluid specified for all 98 and up Chrysler products. It is highly recommended to use this fluid with a lock up torque converter application. This fluid has additional additives to resist heat, foaming and corrosion.) n end blog :salut:
http://www.aeroquiphose.biz/
http://www.jegs.com/webapp/wcs/stores/servlet/CategoryDisplay?catalogId=10002&storeId=10001&categoryId=10603&parentCategoryId=10109&langId=-1[/URL]
http://cgi.ebay.com/ebaymotors/ws/e...&item=7934312319&rd=1&sspagename=STRK:MEWA:IT