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How about the old A345 compound transmission? It came in Dodge D600 and D800 trucks and school buses. Some were mated to 413s, I wonder if there is enough tail housing beef and oil passages to convert it to A518 style overdrive.
I am planning on using the E4OD since it is a "1" piece design, but the A345 would make it easier to put a big block in a new Ram 1500.
Well I collected a Ford E4OD transmission. If I have to adapt to put on an OD trans, I might as well get a strong one. I searched the internet and find that most say the E4OD can be made into the strongest of the OD trannies. I must admit it is quite large. The E4OD will require a computer to operate just like the GM 4L60E.
I will look into making an adapter, first, then I will start to collect rebuild and hop up parts.
When I searched for all the automatic transmision info, for these late model OverDrive transmissions. The 518 MoPar unit recieves the least respect. The Ford E4OD has the highest torque capacity(when tuned up). The GM trannies have the aftermarket all on their side with every possible performance piece available. Since I have to adapt anyway, why not go for the strongest trans?
One thing is certain the old 727 was far and away the strongest 3 speed automatic, but adding the OD on the tailshaft has become a limiting factor.
How "loose" of a torque converter does a 528 inch Hemi require? Back in the "old days" we used to stick a Vega TH200 converter behind a small block V8 to gain some stall speed. Do you think a stock 351W conveter from a 1/2T truck would be loose enough for this engine? The Hemi will probably make 2-3 times the low end torque compared to the 351.
I have received a Baumann TCU to control the E4OD. I have aquired some thinner pressure plates for the C6 and/or E4OD that allow the use of additional clutch plates. There are also iron and steel planet carriers that have additional planets. Now that I have the milling machine running I will start to make the adapter.
The adapter is looking pretty good so far. Only 1 problem area. The left side Ford dowel and Chrysler bolt want to occupy some of the same space. I plan to remedy this with a hollow dowel in the Chrysler block then drill and thread the hole for an extra bolt. I am going to pick up the 2 lower Ford brace holes.
I need to get a picture of the adapter plate and flex plat up here.......5/23/08
The transmission is bolted to the engine. Now I can finish the crossmember, and motor mounts. After getting everything mounted I will have to finish the flex plate and starter part of the adapter.