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Discussion Starter #1
Hello, I know this subject has been discussed before but I still cant find the answer I am looking. I am planning to mount a 4bt to an AOD. My understand is that it is a direct bolt on but flexplate will not work even with a C6 due to its depth. I remembered someone welded a two piece with 700r4 flexplate and adapter to mount an AOD 4 bolt torque converter. Can someone guide me through this. I appreciate the help.

I have an AOD transmission and I dont plan on buying a new transmission.
 

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What size engine was the aod bolted to?
 

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Second page in thread Any info on the Ford AOD... Its in the FAQ in this section

Adapter - 3912601 FH9043
Flexplate - 3918957
Clamping ring - 3904361
Crank adapter, (hub?) - 3907620
Torque converter adapter - 3907619
 

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Discussion Starter #5
Second page in thread Any info on the Ford AOD... Its in the FAQ in this section

Adapter - 3912601 FH9043
Flexplate - 3918957
Clamping ring - 3904361
Crank adapter, (hub?) - 3907620
Torque converter adapter - 3907619
Second page in thread Any info on the Ford AOD... Its in the FAQ in this section

Adapter - 3912601 FH9043
Flexplate - 3918957
Clamping ring - 3904361
Crank adapter, (hub?) - 3907620
Torque converter adapter - 3907619
Thank you but isn't that for C6 applications? AOD uses different flexplate compared to C6. If I were to go C6 route, I will have to buy a transmission and an adapter to mount it on 4BT. AOD is completely different, AOD will mount to 4BT, you dont need an adapter but the flexplate is the problem.
 

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OK, I going to try to sort this out. Mind you, I'm no auto transmission specialist. The 4bt used in Ford van applications never came with a small block auto transmission. There was only one flex plate for the 4bt which is the one Red gave you. That one was used on the TH475 that came behind most of the GM 4bt vans. That flexplate/wave ring assembly can be used on a Ford because we have a very few who have done it. Two things that I know required are #1 to modify the block adapter plate for access to the torque converter bolts and #2 you must use a 6 bolt torque converter. If no 6 bolt converter exists for the AOD then this may not be possible but I did see one article showing that transmission came in '91-93 F250 with the 7.3 diesel.To my knowledge, most our Ford applications have either been the E4OD or the 4R100 which are computer controlled. Even though you use a small block version you can use the diesel 6 bolt converter. I'm not sure of the strength of the AOD or its shift points. Must remember that a 4bt reaches full torque at around 1700-1800 RPM where gas engines will be about 1000 RPM higher. You may need a custom valve body on the AOD to make it shift at lower RPM. Might contact member Camccardell who is one that uses a Ford automatic.
 

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Discussion Starter #7
Thank you so much. One of the member says the stock AOD worked well for him. Just gotta get a low stall converter. So in other words get that wavering modified to mount a low stall converter. Do I still need a transmission adapter or it is straight bolt on. From destroke website that sells adapter says that AOD does not need a transmission adapter.
 

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Thank you but isn't that for C6 applications? AOD uses different flexplate compared to C6. If I were to go C6 route, I will have to buy a transmission and an adapter to mount it on 4BT. AOD is completely different, AOD will mount to 4BT, you dont need an adapter but the flexplate is the problem.
If you read them, they discuss both the AOD and the C6 in those threads. And talk about a modified wave ring. Good luck.
 

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You don't modify the wave ring. It is what it is and bolts to the torque converter and flex plate. Member RubeBonet makes a custom unit but it is the same overall thickness as the stock one. If your transmission was SB Ford there should be no need for mods unless there is something strange about that unit. Just locate a 6 bolt torque converter for your transmission with a stall speed around 1300 RPM.
 

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Second page in thread Any info on the Ford AOD... Its in the FAQ in this section

Adapter - 3912601 FH9043
Flexplate - 3918957
Clamping ring - 3904361
Crank adapter, (hub?) - 3907620
Torque converter adapter - 3907619
I have all of these parts minus the 3912601 FH9043 adapter( I do, but not with me). And I have the proper length 8 crank bolts as well if interested. Used in great shape.
 

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Red is that kit part # FH9043 or FW9043. Uptime Truck Parts shows that kit in their catalog. That kit actually with only the flexplate parts. Adapter 3912601 for the SB Ford or 3916101 for the GM came separately. Kit FW9043 includes the following parts.
3901935 hex bolts (8 included) #1 in diagram
3907701 crank adapter #2 in diagram
3908124 torque converter adapter (wave ring) #3 in diagram
3904361 clamping ring #4 in diagram
3900665 hex bolts (6 included) #5 in diagram
3918957 flex plate #6 in diagram
 

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Correct FW9043 Just the 7 flex plate parts as I posted previously, Char. As stated above, told Enzo, no adapter comes with it(stated he didnt need one).

Adapter - 3912601 FW9043
Flexplate - 3918957
Clamping ring - 3904361
Crank adapter, (hub?) - 3907620
Torque converter adapter - 3907619
8 crank bolts
6 wave ring bolts
 

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