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Click on image for the lowdown. 
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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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#51042 10/10/2005 7:22 AM | Joined: Jul 2003 Posts: 586 Shop Shark | | Shop Shark Joined: Jul 2003 Posts: 586 | I believe it's a vent hole. It allows air to escape when the gears are spining and oil is thrown around. The volumn of air changes. This way there is no pressure on seals. Kind of like our ........never mind. Cecil........ | | |
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