Originally Posted By: Johnyjj1212
Originally Posted By: mechtech2
Moly would be great in a 'crash box' with no synchros.
Also, very good for many parts in a trans WITH synchros.
BUT... horrid for synchros, because they would slip, not grab. Maybe with aggressive synchro facings, we could get away with it.
It is not worth taking a chance!
So, you think that even in the dosage indicated by that post I quoted it would be bad for the synchros?
Correct me if I'm wrong: The moly would not attack the synchros per se but only make them not work well because of the not enough friction in the oil?
Right - the moly is not corrosive. It makes the synchros slip, which is great for making things grind and balk when you shift.
Is a little OK? It's not worth the chance! Really.
I'd love to use moly in trannys and transaxles, but the deal killer is not being able to shift right.
Let's avoid it and use the best gear oil we can get.