It does take a bit of force to get that bushing assembly out of the transmission case, so that pin on the plug is likely GM's belt and suspenders approach to get it to stay in place, or maybe to keep it from rotating within the housing if the u-joint yoke were to seize on the bushing.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.