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Re: Used Parts Build
The hole has to do with environmental compliance for waste that effect storm water run office. It is quicker and more effective at draining the MOST oil out of a transmission when it is brought in to a yard. If you look at the plug on his pan above, the drain plug would leave a significant amount of fluid in the pan if that is the only method to drain the oil. ALSO, a lot of transmission pans from the factory did not have drain plugs and the quickest and cheapest why is the poke a hole in the pan.
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