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Thread: 4 Speed Autos, Late & Early The Same?

  1. #1
    Supporting Member Turbo Mopar Contributor zin's Avatar
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    4 Speed Autos, Late & Early The Same?

    I'm wondering if the trans is basically the same. Specifically, I'm wanting to find out if a 2003 and up will still be compatible with the 2002 and older trans controllers.

    Thanks!

    Mike
    "The Constitution is not an instrument for the government to restrain the people, it is an instrument for the people to restrain the government - lest it come to dominate our lives and interests." - Patrick Henry

    Bad laws are the worst sort of tyranny.
    - Edmund Burke

  2. #2
    Moderator Turbo Mopar Staff Vigo's Avatar
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    Re: 4 Speed Autos, Late & Early The Same?

    basically, yes. There were running changes but as far as swapping it in and running it will work. Im pretty sure a tranny that new is not gonna have a spot for the vehicle speed sensor on the extension housing so you'll have to swap your old one. just nuts and bolts. You may have to modify the older style mount some because i think the mount pattern on top of the case changed sometime in the late 90s.


    actually if you go WAY back like circa 93 the 604 had the TRS connector seperate and it had its own hole in the case so i guess if you go that far back with a newer tranny you might have issues.

  3. #3
    Supporting Member Turbo Mopar Contributor zin's Avatar
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    Re: 4 Speed Autos, Late & Early The Same?

    Thanks, looks like I could just get the harness and control module from a 02 or so and use a newer trans with it, that's reassuring.

    Mike
    "The Constitution is not an instrument for the government to restrain the people, it is an instrument for the people to restrain the government - lest it come to dominate our lives and interests." - Patrick Henry

    Bad laws are the worst sort of tyranny.
    - Edmund Burke

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