trans help
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Senior User
Joined: Jan 2011
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trans help
i am looking at buying a '88 bronco 4wd with a 302. the trans is slipping and before i buy it i want to know what it will cost to replace but dont know what trans it is can anyone help?
Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
The only overdrive automatic transmission available at that time was the AOD and it could be as simple as a misaligned TV (throttle valve) cable. If it is out of adjustment the shift parameters get goofy in a heartbeat.
Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
The TV cable is unique to the AOD. It is a mechanical shift control link that runs between the throttle valve linkage and a corresponding external control arm on the AOD trans.
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Hotshot
Joined: Nov 2008
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From: Semper Fi tell I die!
i thought the 4r70w was just a version of the AOD?
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Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
I am unaware of the applications that the 4r70w can be found in so I'm am ill equipped to accurately answer that question. I know the AOD to be an over drive-equipped variant of the C4 automatic.
FTE Legend
Joined: Mar 2009
Posts: 161,106
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From: North Bay Ont Canada
NOT TRUE, the AOD is a C6 is disguise, with OD
FTE Legend
Joined: Mar 2009
Posts: 161,106
Likes: 8,091
From: North Bay Ont Canada
When the E4OD was introduced it was an all new case & power train much stronger than a C6. All the autos we have now are derivative of the E4OD.
Sorry to the OP we got off topic a bit.
Sorry to the OP we got off topic a bit.
Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
I yield to the better knowledge but argue with the assumption that the E4OD was stronger than ANYTHING. Behind diesels they are a constant source of problem and behind gas engines they spill their hydraulic pump guts into the torque converter between 80 and 100k. (I've personally dealt with this on five separate occasions).
rickybobby,
Any auto with ONE gear dying is suspicious in my mind. If the whole thing is slipping or shifts erratically there are things you can do to service it. But a single gear with a problem in an automatic sounds like a user-related "fup".
rickybobby,
Any auto with ONE gear dying is suspicious in my mind. If the whole thing is slipping or shifts erratically there are things you can do to service it. But a single gear with a problem in an automatic sounds like a user-related "fup".