904 transmission leaking

I replaced the front seal, rear seal, and pan gasket on my 68 904 while I had the engine out (2 years). Now that everything is back together I am having a problem with the dipstick tube leaking. I got several o-rings from RockAuto to replace and see if that is the problem. When I pulled the tube out at least 2 qts came gushing out. Is this normal? The car has only been sitting for about a week since driven.
Thanks