Hello,
Yes often times just snugging up bolts and fittings will slow or stop leaks. The trans pan gasket is thick cork, snug to tight , but dont over tighten it. Misc. fittings and cover bots that you can reach should also be checked.
If the trans is overfilled, the fluid will foam up and blow out the vent on the top after or during a drive.
Old dry tranmission seals tend to leak at rest and revive a bit after some driving.
Check the fluid level with the car on perfectply level ground and the engine warm and running. The marks on the dip stick indicate one PINT between them not one quart.
If you find that your fluid level is too high, you can open one of the trans fluid lines at the bottom of the radiator and bleed off some fluid.
Joe Alexander
Blacklick, Ohio