Help me identify/locate this part for my 904

Weird that it's not discolored from heat. But I suppose if the reverse/high clutch wore down gradually, and reverse became delayed, then every reverse engagement would be extremely harsh (when it did finally engage at a high rpm). But anyway, 904 kits are extremely cheap, cuz now you're going to need an overhaul kit for the clutches; unless you scavenge them from the other trans....but you'll need that top plate, so might as well take it apart. I hope you checked the endplay before you pulled the pump. You'll need a pump gasket, front seal, pump o-ring, and pan gasket at a minimum. Those come in a $15 seal up kit; along with tailshaft housing gasket, speedo seals, kd shaft seal, etc. But you'll have to order the rear seal special.