you get to one by pulling the flywheel and you need a flywheel puller(no oil in that side probably not the problem). Have to have the puller or you willl f stuff up. the other is on the clutch side so when you replace that gasket you can check it out. you are either leaking trans oil into the crank chamber from the crankshaft seal or from between the cases but i would guess it would be from the clutch side crankshaft seal