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Just as a point to ponder, the A518 came in non-lockup and lockup converter configurations, with a governor (no computer required), while the later version is known as the 46RE, which is partially computer controlled, and lock-up converter only.

The A618, and later 47RE and 48RE, came behind the Cummins Diesel and V10 only. I am not sure about the V10, but I know that the Diesel version bellhousing bolt pattern is different from the usual smallblock bolt pattern, and the torque converter is a massive 13" unit. The A518 family use an 11" converter basically the same as older 727s used. The lockup clutch in the 11" converter is barely adequate behind a 360 in a pickup or van, so I would recommend the non-lockup variety for your Hemi.

Since you must use an adapter plate anyway, going to the GM 4L80-E may be a better option, both from the available parts and that it should fit the floorpan more readily than the Mopar unit. Also, there are aftermarket lockup torque converters for the 4L80E in various sizes and stall speeds available, as well as stand-alone transmission controllers with wiring harness for the 4L80-E. This stuff is rather pricey, however.

And another option is the Ford AOD, as modified by several aftermarket companies. It definitely will fit your floorpan without serious mods, and some companies claim capacity improvements to 1000HP.

440shorty

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right under the reverse switch there is either a 2 pin OR 3 pin connector - 2 pin id OD 3 pin is OD lockup... they didnt make too many 2 pins, but thier out there...

Pat is the man to talk to for this application...
later, magnum motors have a round 5 pin connection that is all electronic, creating a problem since they use a PCM from then on...

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Who is Pat? Thanks for the link, this is good stuff. I am now leaning towards the 518 to keep it all Mopar, but I am still going to look into the AOD swap as well, but the 518 sounds . The thing is, my motor will be making a butt load of power (472-489" Hemi, depending on which stroke I go with, and I just picked up a X Trim Vortech blower and will make about 10 lbs of boost, so looking at 800-900 HP on pump gas) The 489 will be a .030 over with a 4.25 stroke, and the 472 will be a standard bore and 4.15 crank. But, I am also looking into the 4.50 crank and a .030 over for 518 CI. Anyways, she is going to make some power. This X Trim blower is NASTY. The 4.25 is more common than the 4.50, as well as cheaper, so the 4.25 may be the choice, but I will cross that bridge when I get there. I have the Siamese bore Hemi block, and the X trim blower already, and just need to gather some more parts....decisions, decisions....

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pat is smr...

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Roger that

I also took a look at the transmissioncenter website. Man, they have a bunch of tranny stuff (AOD, 4L80, 518, 700R4) even though I did not see an adapter for the tranny to a Mopar, except for the 518. I emailed them as well with some questions.

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Seems you're making this more complicated than it needs to be.

First, easiest, & likely, least expensive option, would be a Gear Vendors O/D unit bolted to your existing trans. Every other option will require custom fabrication & $500+ adapters.

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