I didn't over tighten the drain pan bolts but this gasket is leaking just three weeks after installing it on my Ford E4OD. It is used on a quality brand new transmission pan. To be honest I think you would want a transmission pan with a flat machined pan edge rather than the typical stamped steel or aluminum construction. But I can see where an edge of the gasket has split and that's where the leak is. Replaces traditional rubberized cork gaskets and Honda sealant. This usually fixes leaks for years. Then again, it's a Ford product, so fixing leaks is a full-time hobby :). Three stars for a high quality product that may require a more detailed use case description before a customer orders it.