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Old 04-24-2011, 08:20 PM
chevy302builder18's Avatar
mr mighty mouse
 

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build this tranny or not?

ok i have a 1989 Lincoln town car and this transmission is a AOD standard, idk much about this transmission, except it doesnt look like the regular AOD. It looks like a C4 but with a overdrive. Takes standard C6 filter though. but it slips a lil but it still does good. But i was wanting ask would this transmission be good investment to build to hold and with stand 300 + ft. Pounds of torque?

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Old 04-27-2011, 03:56 PM
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Hi

The only stock AOD that would hold up well at all, would be one out of a 92-93 302 truck, they had all the case updates, the 2" o/d band and the large o/d servo. It would still need the direct clutch pack upgrade to be really reliable. Any case older than 89 should be avoided.
To help an AOD last, the following will help just like GMs 700R4.
Install an axillary transmission cooler. Heat is what kills any automatic transmission.
Make sure the TV rod or cable is attached & adjusted.
Stay out of overdrive if you are towing, or if the transmission "hunts." Excessive shifting between 3rd and OD will burn up the OD band quickly.
Change the fluid/filter @ about 35K
Rich

Last edited by richard stewart 3rd; 04-27-2011 at 04:01 PM.
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Old 04-27-2011, 05:16 PM
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Quote:
Originally Posted by richard stewart 3rd
Hi

The only stock AOD that would hold up well at all, would be one out of a 92-93 302 truck, they had all the case updates, the 2" o/d band and the large o/d servo. It would still need the direct clutch pack upgrade to be really reliable. Any case older than 89 should be avoided.
To help an AOD last, the following will help just like GMs 700R4.
Install an axillary transmission cooler. Heat is what kills any automatic transmission.
Make sure the TV rod or cable is attached & adjusted.
Stay out of overdrive if you are towing, or if the transmission "hunts." Excessive shifting between 3rd and OD will burn up the OD band quickly.
Change the fluid/filter @ about 35K
Rich
Nothing can ruin an AOD transmission as quickly as improper TV settings.
For a rough place to start you can remove the cable from the throttle body lever, and adjust it so that the cable is neither slack, nor under tension when the cable is reinstalled on the throttle body lever. This will get you fairly close. however this isn't for a final setting. You should always use a gauge to verify your TV setting.

You will need to install the gauge into the TV test port on the transmission. The port is located on the passenger side of the transmission toward the back. Above the pan rail you will find two 7/16 headed pipe plugs side by side. One plug is level with the outer edge of the pan rail, and the other plug is recessed, the recessed plug is the TV test port.
Remove the TV test plug and install the fitting for the gauge, attach the line from the gauge to the fitting in the test port. With the engine running at idle the gauge should read 0 to 5 pounds. there is a tool for testing TV pressure (installs on the ball end of the cable to pull it a measured amount), the reading on the gauge should be approximately 30 psi with the tool installed. If you don't have the tool you can put the gauge in the car with you while you drive down the road, take someone with you to watch the gauge, normal acceleration from a stop should produce around 30 psi you also want to make sure that as soon as you start to apply throttle, the gauge reading begins to rise. This is a good indication that there is no slack in the cable. If you would like you can also check the WOT pressure with the gauge mounted this way, it should read around 85 psi.
Good luck
Rich
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Old 05-12-2011, 12:04 AM
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thanks for replying! Yea its a wierd looking tranny. Ill have to check into that, the TV cable, is this also refered to as the kick down?
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Old 05-12-2011, 11:28 AM
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Yes, Kick down is a carryover name from the transmissions that when you pushed the accelerator down, the transmission would drop back into 2nd gear. (totally wrong terminology for Throttle Valve cable) The TV cable is different, look back at my first reply where the gauge is attached to the TV port.
Rich
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