AOD Torque Converter

[baldy1]

I have argued with a few people here about an AOD torque converter having lock up. I have been saying that they don't have lock up. The reason why I have said this is because if you look at a hydrualic chart for an AOD there is nothing there for lock up. Also we all know that an AOD is not controlled by the PCM its controlled by the TV cable which controls the pressure internally for shifts. Well I have done my research and made calls to converter companies about thisand asked them about it.

I was wrong AOD's do have lock up. They have a damper inside of the converter which is applied by centrifugal force. The reason why I said that they don't have it was because you never feel it. In most transmissions you feel lock up because its either done by hydraulic operation or by a solonoid controlled by the PCM. I have been a transmission tech for 12 years. So I was missled by a few people.

Let this thread stay here for a few days than move it or delete it. Thanks

 

[dcurtis]

Don't worry, there are a few others on here that think there is no lockup in an aod tranny.

 

[Darrin]

Tell them to look at the order forms for torque converters....B&M, Oregon performance, etc....they all say for "lock-up" Yes you can get onewithout lock-up but.....

 

[baldy1]

I did notice that today. I looked in my converter books for a converter and it was for an AOD and it said lock up. Dont why I never noticed that before. O well I know now

 

[rd]

The aod does not have a lockup converter of the same type that the later AODE and 4r70w have.

The aod has two input shafts from the converter, one from the converter turbine and one from the converter case. It uses the bands and clutches to lock the input of the trans to the converter case when it wants to lock.

The converter is unique to the aod, but doesnot have the internal clutch and controls that others have.