biglow說的對。看下麵解釋

來源: ashmia 於 2015-04-08 18:04:33 [] [舊帖] [給我悄悄話] 閱讀數 : (274 bytes)
回答: dust cap 由 biglow 於 2015-04-08 18:02:41

Many people have been confused when finding this part in their transmission. It is a plug, used in shipping the transmission. When the dipstick is pushed in, it falls into the pan. Ford elected to leave it there, they cause no harm other than to confuse folks who find them.

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