Aod

[Rinny650]

I have a AOD, I believe, in my truck with my new 347. Now the transmission came out of a mercury colony park station wagon. Im assuming it has overdrive because of that so it leads me to think its and AOD. It has one small round connector plug on the rear left side of the housing. Its a 5 wire plug I believe. I was told it goes to the computer to tell the converter when to lockup in top gear. My truck doesn't have the computer at all. I was told that by not having the computer, by my uncle who has been a ford tech for 30 plus years, that the trans would still shift fine, it just wouldn't lock up. Is this correct?

Also I need the slip yoke where it slides on the output shaft. Where can I find one? Junkyard? What vehicles should I look for to have one? My truck has the one piece driveshaft with a slip section on the front. Will it still work?

 

[Gotta_gofast]

If you have an AOD transmission then the lock up feature is mechanical, not electronic. There are three shafts in the front. One is your pump, one pulls power off of your torque converter, and the inner solid shaft is basically driven off the flexplate. During 3rd and OD the transmission will use the inner shaft instead of the outer "torque converted" shaft to achieve lock up.

The AOD-E/4R70W used an electronic feature which enabled the clutch within the torque converter to "lock up" when needed. If this is the transmission you have, then the trans will need a computer for it to work. Bauman engineering makes a stand alone controller for the trans. I am not very familiar with the Mercury Colony Park station wagons, what year is it? This will help a lot for identifying your transmission.

 

[Rinny650]

They told me it was either and 87 or 89. How can I tell which trans it is? Is there anywhere on the trans that well tell me? It has two rods on the side for the shift linkage. The shift linkage is in the rear and it connects to another linkage in the front which is the kickdown I believe since it has a cable that runs up to the motor.

 

[Gotta_gofast]

On the AOD transmission, you will have a shift linkage and a Throttle Valve linkage (not to be confused with a kick-down linkage). If you have the AOD, this needs to be properly set because it controls the line pressure in your trans (the pressure that holds your bands). If this is not set right, you will have one deep fried slushbox in about one or two shifts! I run a lentech AOD so I'm pretty familiar with them. The connector you mentioned, is there a possibility that this is your reverse, neutral signals? Its been a while, I don't remember where or what the plug looked like. The bottom of the transmission oil pan will most likely say "METRIC" in very large letters if it is an AOD. Also, the shift pattern is a 1-D-O/D pattern which sucks greatly. This 347 you have will be no fun behind an AOD in stock form (1600rpm stall converter and the possibility of snapping the inner direct drive shaft). My lentech Valve Body allows 3rd gear to run completely off of the outter shaft driven from the torque converter instead of the inner shaft. This leaves only OD to lock up. Also, it changes the shifting pattern to 1-2-D/OD by changing the fluid paths and adding a solenoid to select overdrive. Also, behind my SBF sits a TCI torque converter which launches me around 2900-3000rpm depending on traction while allowing me to cruise in a locked up OD on the highway. Some other mods I would strongly suggest is to pick up a hardened input shaft, a deeper oil pan, and a trans cooler. Your 347 might make the power, but you need to get that power to the ground in order to use it!

 

[Rinny650]

This one has a ford racing pan on it. Im using a trans cooler also. This isnt for drag racing at all. The cable I was talking does go to the valve body. I just assumed it was the kickdown until I read about adjusting the tension. It could be the reverse signals maybe. Its actually mounted almost at the tail housing shaft. I was told the trans could be ran without a kickdown but now it appears that I dont even have a kickdown to run. So if its a regual AOD then it will run without the computer?

 

[Rinny650]

I really need to know some info on this. Truck will be running tomorrow and need to know where to get the output shaft yoke

 

[Gotta_gofast]

AOD is mechanical, no electronics. The TV cable needs to be adjusted properly. I believe the numbers are 0-5psi line pressure closed (idle) and somewhere around 30 +/- 3 line pressure all open (WOT). Check those numbers before you set it though. I might be off.

 

[Rinny650]

Okay so what about the yoke? What would be a vehicle to look for that would have the yoke on it?

 

[desertrunner]

ebay, i got a brand new one about a year ago, cant rememer the cost but it wasnt much, good product as im still runnin it today

 

[Rinny650]

I cleaned up the pan while I was under it a while ago and the pan does infact say metric. So does this mean it is an AOD or could it be an AOD-E?

 

[Gotta_gofast]

If the trans was pre '93 then it was an AOD. The AOD-E did not debut until 1993.

I'm willing to bet your trans is an AOD because you stated an '87-'89 year. Also, you say there's a TV cable lever on the trans (mounted through the gear select lever). If it were an AOD-E you would not have a throttle valve cable to control the line pressure. It would have an electrical connection on the right side to control line pressure, torque converter lock up, and shift solenoids (this is why the AOD-E has a push button to eliminate overdrive vs. the AOD's shift pattern).

 

[Rinny650]

Okay well i have the TV cable. The plug I was talking about on the left side is a round plug. It has three round prongs around the outside and then a keyhole looking place in the middle to line the plug up

 

[mike732]

That plug is fir reverse lights, and neutral safety.