What's the trick to stopping the transmission leaking ? Had new gasket and torqued to spec . Then tried nipping the bolts up . Checked level can't get it to stop weaping on the driveway . Any tips or tricks would be useful

 

If the pan has been crunched then it will never fit and seal properly.
In that case you will need a new pan and gasket and to meticulously clean the mating surface before you install the new pan.

However, it may not be the pan that is leaking, so I would recommend a thorough check before you replace the pan.