Forward Drum with TH400 Piston & Spring Retainer.
I Omit the Wave plate in both drums, If it breaks (And they do!) the "Lugs" will slip under the ledge it the drum & prevent the piston from applying or only apply one side leading too clutch burn up!! This will make forward engagement a little more firm but nothing drastic if pressures are right. The arrow is highlighting the Lug & Ledge, A Flat .077" Steel CANNOT get under the ledge!
