I have had bad luck in the past with leaking pans. I was just wondering if you guys know of a good transmission pan that seals well. Steel or Aluminum?

I bought a Moroso TIG-welded steel pan for my TH400. Pricey, but has never leaked a drop. I have never been able to get a factory pan to seal, guess I just don't have the knack.

I've bought the TCI deep aluminum pan, it's machined flat, is solid, and seals well.