Posted by Mike Hernke (MO) [172.68.58.176] on Sunday, January 28, 2018 at 22:28:12 :
In Reply to: gear lube vs automatic transmission fluid posted by John Szewczyk [162.158.78.61] on Sunday, January 28, 2018 at 07:53:43 :
I have read several places that additives in 90wt gear oil can damage soft metals such as brass or copper in sychros. My guess on atf is that it adequately lubricates and is safe with all metals. I have ran 50wt motor oil in my older manuals for quite a while and it seems to work well. It is about the same weight as 90w gear oil. I don't put enough miles on my older stuff to really say much about long term but it shifts well.