QUOTE(Randal @ Feb 3 2011, 03:00 PM)
What is the best stuff to put on a mag case transmission. I've heard Tectyl is the stuff to use... but that stuff is like cosmoline, isn't it?
It is pretty much like Cosmoline, but not 100% the same. Cosmoline and Tectyl are both brand/trade names for coatings that meet specific MIL specs. Tectyl happens to be the brand the Porsche used (and I believe still uses). There are various formulations of Tectyl. It will wear off in about a year or so, but works pretty good IMHO (and based upon some testing I have done) and is much better than nothing. Personally I don't think Porsche put a great deal of thought into how these cases would survive 35+ years of use from a corrosion perspective. Here is a recent thread...
http://www.914world.com/bbs2/index.php?sho...=114904&hl=It has been discussed a good bit if you search for older threads.
Richard