I'm in final stages of a rebuild of the 5HP24 on my 98 VDP.

I've built a test plate to verify clutch operation using compressed air per the procedure in the ZF manual. The plate is plexiglass modelled on variants I've seen on a BMW forum.

My question is this. When I apply air, I can tell that the clutches are operating. However, there is leakage on almost all clutches (ie they don't hold air). Much of this I can attribute to not getting a good seal at the source. however, a couple of clutches (B and C in particular) are clearly leaking air. I'm not sure what to make of this - should I expect an airtight seal or should I expect leakage at this stage because the O rings and seals are new & require fluid to fully seal and just be happy that the clutches are operating.

The manual is silent beyond the statement that you should check for correct operation.

Input appreciated
Scott