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Thread: Which Mopar automatic overdrive trans for a 440

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    Which Mopar automatic overdrive trans for a 440

    I'm sort of thinking outside the box here on a project. But is there a modern mopar automatic overdrive that will bolt up to a mid 70's stock 440 ? and handle the torque and h.p. Thanks , Ed

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    Golden Hawk Member
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    The problem I see here is that all 440s were in rear wheel drive cars and all MODERN MOPAR automatic overdrive transmissions are for front wheel drive cars, except for some Jeeps and the Canadian built Challenger, Charger, 300. There are MOPAR transmissions that will handle the power, but I believe that they are far from "bolt up" conversions.

    EDIT: Perhaps your definition of "modern" is different than mine.
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    Maybe a truck transmission?
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    The last Mopar Big Block was built in 1978. So, the "newest" transmission that would bolt to it is 41 years old. With most automatic transmissions having the bellhousing integral to the transmission adaption is going to be difficult. I have read that over in Australia they do a lot of odd adaptations. So, something may be available over there. Perhaps a 727 Torqueflite and something like a Gear Vendors overdrive unit is the most logical way to go. Frankly you would be better off asking over at Allpar or one of the other Mopar sites.
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    President Member bob40's Avatar
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    1990-95 a-518

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    1990-95 A-518

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    Speedster Member nwi-region-rat's Avatar
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    Quote Originally Posted by bob40 View Post
    1990-95 a-518

    - - - Updated - - -

    1990-95 A-518
    Perhaps my definition of a modern car is different than some others. I do not consider 29 years old to be modern.
    Gary L.
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    Quote Originally Posted by nwi-region-rat View Post
    $3K to put in a 31 year old transmission design is not what I consider to be a modern upgrade.
    Gary L.
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    Golden Hawk Member Dick Steinkamp's Avatar
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    If you get much newer than a 30 year old transmission, you are getting into some relatively sophisticated transmission computer controls tied to engine management systems that aren't compatible with a 70s engine. Some can be done, but not many. Here's an article on putting a newish (late 90's) GM 4L60E in an earlier Chevy. Lots of work and money...

    http://www.superchevy.com/how-to/tra...-early-a-body/

    A TH700R4 or TH2004R would have been lots easier and cheaper with pretty similar drivability results.
    Dick Steinkamp
    Bellingham, WA

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    My 2 cents. Yes, the 518 is supposed to be a viable swap, if you can locate one and deal with the small stuff. It's got external electric controls, I believe. Your best bet--most cost effective, given that there is no easy bolt-in AODs available from your local self-serve wreckin' yard, would be to change the final drive ratio(rear end ring/pinion gears) to the highest ratio(numerically lowest) readily available. Such as a 2-something ratio. That is feasible because the torquey 440's in big cars(Imperials, New Yorkers) generally used highway gearing(2 series ratios), and if you have a fairly light car & a large displacement engine like a 440, gearing up isn't going to hurt performance, i.e. acceleration, much. But, it will reduce engine noise & wear and decrease fuel consumption. Many enthusiasts initially get into overkill modfications(like low gearing) that are all wrong for their intended use, anyway. I figure spending under $500 on the project; depends on how much of the labor you can do, yourself.
    Last edited by Reggie; 04-14-2019 at 11:01 PM.

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    It looks like Summit has a Big Block Mopar to A-518 adapter bellhousing. https://www.summitracing.com/parts/jpt-92457 (see question #3 on the page). Not cheap at nearly $500. Apparently the 518 was either a smallblock or a diesel engine configuration and did not come with a big block bolt pattern from the factory.
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    President Member bob40's Avatar
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    Anything newer than 1970 is modern to me.

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    I'd go & ask on a MoPar forum if I were you, I've done that loads cuz Josephine is MoParized...


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  14. #14
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    Thanks guys , I knew you all had the info I needed, Ed

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