please and thank you.
I'm going to have to disagree with you on that one. Some of the old synthetics did in fact cause gaskets to leak though I never saw seals leak. They would just pour out the gaskets, when the only thing that changed was synthetic oil after a long period of running common oil. The theory was that it washed all of the build up from the gasket surfaces and the brittle gaskets couldn't make up the difference.Synthetic is recommended in trans and differentials nowadays for it's better ability to withstand extreme temps plus other benefits over non-synthetics. And the rumors years ago that switching over to it caused seal leakage proved to be nothing but an old (mechanic's) wives tale.
So you think it has never happened, right?Right, every one of those oil companies are lying to us and I just hate it when that happens.