Is it a good idea to re-torque automatic transmission pan bolts, and differential cover bolts? I tightened mine to specification with a torque wrench when I serviced them. I recently checked the transmission pan and the bolts were loose. I can't remember if I used gasket sealer on the pan, but I don't think I did: At least not on the, milled flat, housing side. I also used an aftermarket gasket, not the factory one. I was told that it is normal for the bolts to loosen because the gasket flexes or shrinks. The factory bolts didn't come loose.
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