Vacuum Hoses
Lead Driver
Joined: Oct 2003
Posts: 8,476
Likes: 37
From: Madison, WI
Vacuum leak can't affect performance, because it's not _engine_ vacuum. It's "ginned up" vacuum from the pump. Idunno the automatics, but I doubt that anything about them is vacuum controlled; that's a '70s thing. Only thing the vacuum pump connects to (AFAIK) is the HVAC control and the power brake boost. A leak will usually sound like a hissing noise.
Update - the C6 tranny has a "vacuum regulator valve" tied to the distro block.
Update - the C6 tranny has a "vacuum regulator valve" tied to the distro block.
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Logistics Pro
Joined: Oct 2008
Posts: 4,818
Likes: 1
From: Avilla, IN
So then the vacuum lines have nothing to do with how smooth the transmission shifts? I ask because a friend of mine has a V10 with the 4R100 which is essentially the same as an E4OD, and when he replaced all the vacuum lines the transmission started shifting like brand new again.
Lead Driver
Joined: Oct 2003
Posts: 8,476
Likes: 37
From: Madison, WI
So then the vacuum lines have nothing to do with how smooth the transmission shifts? I ask because a friend of mine has a V10 with the 4R100 which is essentially the same as an E4OD, and when he replaced all the vacuum lines the transmission started shifting like brand new again.
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