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AOD Transmission List of Categories
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- What parts do you recommend for an AOD in a 350 Horsepower application?
- What parts do you recommend for an AOD in a 400 to 500 horsepower application?
- What is the shifter pattern for the AOD?
- Is there any way to manually hold second gear on my AOD through an upgrade. In other words my shifter will not allow me to shift into, and hold second gear. I dont understand this. It doesnt make sense not to have a second gear on my gear shifter.
- Does anyone make a kit to mount an AOD to a Big Block 460? And if so where can I get one?
- I am working on a project AOD Tranny. When I tore it down, it did not have a 3-4 Accumulator in the bore. Should I put one in or could the valve body be blocked off eliminating it? What is the purpose for not installing this Accumulator? A more firm 4th gear shift?
- I have an AOD that was installed in a 74 Bronco and I am super pleased with the overdrive. I am installing a Lokar floor mount shifter and they are saying to turn the shift arm @the transmission 180 degrees. How do I do this, as I am not AOD savy.
Thanks,
Tim
- I have a 1994 F150 4X4. The o/d light flashes, the abs light is on and the speedometer does not work. It shifts fine and there is not any noise. What could be my problem? Thanks Ty
- what is the thread size and pitch for the cooler line fittings that screw into the case. 1/4 npt seems to go in but i dont want to screw up the case if its wrong.
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What parts do you recommend for an AOD in a 350 Horsepower application?
If the transmission is relatively low mileage, and working correctly I would recommend the AOD valve body recalibration kit, and the A+ Overdrive Servo. If you are already doing a rebuild on an AOD I recommend the 2 inch overdrive band conversion kit for all AOD cars that are used regulary on the street. For information on these products, please see our AOD Products Page.
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What parts do you recommend for an AOD in a 400 to 500 horsepower application?
I would use the same parts as the 350 horsepower application listed above, and consider the two inch band upgade kit with mechanical diode manditory. I would also add a hardened direct input shaft, and the Alto direct clutch pack kit. For information on these products, please see our AOD Products Page.
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What is the shifter pattern for the AOD?
The shifter pattern for the AOD is Park, Reverse, Neutral, Overdrive, Drive, and Low. The AOD does not have a conventional manual second gear position. For Information on how to hold the AOD in second manually see the next question.
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Is there any way to manually hold second gear on my AOD through an upgrade. In other words my shifter will not allow me to shift into, and hold second gear. I dont understand this. It doesnt make sense not to have a second gear on my gear shifter.
You can hold second manually now, by pulling the shifter back into manual low after it has already shifted to second. If you are going above 20 MPH pulling the shifter into manual low will put the AOD in manual second. This is the factory intended method for holding manual second with the AOD.
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Does anyone make a kit to mount an AOD to a Big Block 460? And if so where can I get one?
The kit you are looking for is available at Bendtsen's Transmission Adapters. The following link will take you to information about the Big Block to AOD Adapter.
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I am working on a project AOD Tranny. When I tore it down, it did not have a 3-4 Accumulator in the bore. Should I put one in or could the valve body be blocked off eliminating it? What is the purpose for not installing this Accumulator? A more firm 4th gear shift?
In 1989 the 3-4 accumulator was eliminated, and the holes in the valve body that feed it were blocked. If your transmission doesn't have the 3-4 accumulator make sure you use a valve body that is a 1989 or later style or you will have an internal line pressure leak. 1989 and later valve bodies can be used in earlier transmissions with the 3-4 accumulator, but an earlier valve body cannot be used in a case without the 3-4 accumulator. You can add a 3-4 accumulator to a later model case and use an earlier valve body if you have to, but the later valve bodies are recommended. Not having the 3-4 accumulator does not result in a firmer 3-4 shift, the softening of the 3-4 shift is just accomplished differently in the 1989 and later transmissions.
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I have an AOD that was installed in a 74 Bronco and I am super pleased with the overdrive. I am installing a Lokar floor mount shifter and they are saying to turn the shift arm @the transmission 180 degrees. How do I do this, as I am not AOD savy.
Thanks,
Tim
If you remove the transmission pan you will see a nut that holds the internal shift linkage to the shift lever shaft. If you loosen that nut you will be able to rotate the lever and retighten the nut. The shaft has two flats that engage the internal linkage so you will have to make sure they line up before retightening the nut. If you can't get it to move far enough away to allow it to move you may need to pull the roll pin on the pan rail that keeps the shaft from moving in and out.
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I have a 1994 F150 4X4. The o/d light flashes, the abs light is on and the speedometer does not work. It shifts fine and there is not any noise. What could be my problem? Thanks Ty
I would start by checking the codes in the computer. The flashing OD light means it has a transmission related trouble code. The speedometer works off of your differential speed sensor located in the differential on your truck. It reads from a toothed wheel on your ring gear. This speed sensor is also used for the ABS. I would guess there is a problem with the differential speed sensor or the wiring to it. Also the speedometer itself could be defective. The speedometer converts the rear speed sensor signal into a vehicle speed sensor signal and sends this out to the truck's powertrain control module (PCM) for transmission control. The signal may be gone completely or have an intermittent problem. The PCM can also use engine RPM to shift the transmission and this may be why the transmission appears to work fine in spite of the missing speed sensor signal.
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what is the thread size and pitch for the cooler line fittings that screw into the case. 1/4 npt seems to go in but i dont want to screw up the case if its wrong.
The fittings are actually 1/4" NPSM threads. These are straight pipe threads, 1/4" pipe (roughly .520" OD) with 18 threads per inch. Straight pipe threads don't provide a seal so the sealing comes from the shoulder on the fitting meeting the shoulder on the case. I have seen 1/4" NPT with teflon tape used here, but you would need to be extremely careful not to break the case because the tapered threads would act as a wedge trying to split the straight threaded hole in the case.
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