How easy is it to overtorque tranny pan?

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Hey everyone. How easy is it to overtorque the tranny pan on a w124 300e? I changed the filter/fluid and drove to Houston from Austin and left my car in parking for a week. When I took it out again I noticed the tranny gasket was leaking. I found out the gasket had a tear in it causing it to split. I ordered a new one and put it on but my battery is dead so I havent been able to fill the tranny back up yet. I am just concerned that I warped the pan. I had torqued it by hand using a medium sized socket ratchet untill I felt enough resistance that moderate effort wasn't turning the bolt. To be honest I am pretty sure I warped the pan but I just wanted to make sure I am not being paranoid.

Oh, and the pan was not leaking during the drive, so I am not concerned about any possible damage to the transmission.