Brian S - When hook up a preluber as another member suggested to the lube should rule out the lube baffle as the culprit if it will hold around the 20 psi of pressure . One way you can attach the preluber is to tap the inside of lube tube to 1/8 pipe thread so an fitting can be screwed into it for the preluber . The tube is still fine to use after tapping , it will just have threads inside of it .
The lube baffle is a very thin copper disk approximately 3 inches in diameter with a tang on it the sits into a notch in the housing . There are 2 very light springs that hold it against the input shaft bearing to seal the oil .
Another has mentioned to not to use full air pressure in the jumper tube for suppling lube when checking TA clutch operation after assembly of trans , this is why it blow out or warp the brass lube baffle , and pressure should be limited to around 20 psi .
Kuddos to you for doing your first TA job , there are alot of fine very knowledgeable experienced members on this forum who are more than willing to help ..... just keep asking questions .
By the way a long time ago in a land far far away when I was doing one of my first TA's I got well informed about " Mister Lube Baffle " through the " School of Hard Knocks and Life Lessons " I made the mistake once and never forgot my lesson . LOL !!
Is it repairable -- Yes , not sure if CIH has them available yet not , havent tried to get one in maybe 3 decades but I am sure they can be aquired someplace , the aftermarket rebuilders get them from somewhere . I use Hy Cap TA's bet your dealer could maybe get one from them .
The bad part is if in fact it is the problem the TA would have to be removed for repair so do the simpler things first .