turbo 400 shifter linkage

[fastwillie 696969]

turbo 400 ,where the shifter connects to the tranny on the side ,seams to be leaking heavy fluid from the detent arm ,is there a small seal in that case if so how do you take it out ,its about size of a nickle ,i had this tranny taken apart and had the shop add the trans brake ,they said they resealed the front pump but doesnt remember if the shifter seal was replace or not ,it has been about 6mo. since he did the job,this the first time firing up the engine since putting the tranny in .i lost a few qts of maxshift fluid .i thought it was the new lokar dipstick but its not from there .so added more tranny fluid and it pours out as fast as it goes in .