Originally Posted by denny71gt
If I understand you correctly, transmission oil can pass through the "little hole" and into the recess, but it can not (or should not) go anywhere because of the gasket and the seal; the oil will just sit in the recess. This doesn't seem right. What then is the purpose of the "little hole?" Why would you want oil in the recess? I must be missing something.
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Exactly. Why did Opel design it that way? Who knows! But one cardinal rule about Opels of that era is to make sure that the front transmission seal, the front gasket, and especially the bolts that attach the transmission to the bell-housing, are up to spec (as in the bolts are properly torqued). If not, then the transmission loses its oil, and then becomes a pile of broken metal shavings. Guess how I know THAT!