OT 4L80E trans. GM? Aisin?
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  1. #1
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    Default OT 4L80E trans. GM? Aisin?

    Picked up a '99 Isuzu NQR rollback.

    Has the regular japanese 4cyl turbo diesel and a 4L80E Aisin trans with PTO on the side. THe question, is the the same (ie parts interchange) as the GM 4L80E? I have more then one of these and may attempt to rebuild the transmission myself.

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    should be able to look up parts here and compare

    Page not found - Transtar Industries

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    off topics, kinda- what does the '80' reference in 4r80?

    EDIT- It appears to be in reference to the transmission's torque capacity, in kilogram meters.

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    Transtar doesnt list the medium duty isuzu truck

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    A 4l80e transmission never had a power takeoff. You probably have an Aisin transmission that is totally different than a 4l80e.

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    That is what I am trying to determine, a aisin 4L80E is not the same as a GM 4L80E? WHy did they use the same designation? Just to create confusion?

    I know the NQR has a Aisin 4L80E with PTO on the side.

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    Are you sure that you don,t have this? Aisin 450-43LE

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    Quote Originally Posted by Cole2534 View Post
    off topics, kinda- what does the '80' reference in 4r80?

    EDIT- It appears to be in reference to the transmission's torque capacity, in kilogram meters.
    You are correct.

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    Quote Originally Posted by converterking View Post
    Are you sure that you don,t have this? Aisin 450-43LE
    Hmm, suspicious looking. Think I was confusing trans in gas models vs diesel.

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    Quote Originally Posted by Mebfab View Post
    .. trying to determine, a aisin 4L80E is not the same as a GM 4L80E? WHy did they use the same designation? Just to create confusion?
    Reduce confusion, more likely. Bought-in goods, both instances.

    Aisen (Toyota DNA) + New-Process Gear (MOPAR DNA) ==> a major global supplier to MOST others, one with a great deal of "modularity" as to options selecting ratios, count, and.... perhaps PTO or not?

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    No, a 4L80E wouldn't last 20 minutes in that truck.

    Should have the Aisin 450 series.

    Aisin is the largest transmission builder in the world. 450 is a great transmission.

    The engine on the other hand is iffy. The big 4 cyl Isuzu's in that timeframe like to spin main bearings and come apart. They are very expensive to rebuild or repair.

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    Quote Originally Posted by thermite View Post
    Reduce confusion, more likely. Bought-in goods, both instances.

    Aisen (Toyota DNA) + New-Process Gear (MOPAR DNA) ==> a major global supplier to MOST others, one with a great deal of "modularity" as to options selecting ratios, count, and.... perhaps PTO or not?
    No, Aisin is Aisin. Aisin makes transmissions for anyone who wants to pay. Toyota doesn't make transmissions that I'm aware of.

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    Quote Originally Posted by Garwood View Post
    No, Aisin is Aisin. Aisin makes transmissions for anyone who wants to pay. Toyota doesn't make transmissions that I'm aware of.
    So long as Toyoda-San himself FOUNDED it, and Toyota Group still retains ownership of 30% of Aisin-Seiki, they don't HAVE to. Aisin do as they are told. And that's only the direct 30%. The bigger-daddy Keidanren controls some of the other "investors" as well.

    That was their very point, "Japan, Inc.". etc.

    Aisin Seiki - Wikipedia

    See also Aisin AI and the MOPAR hookup. They partnered with New Process Gear on 4WD transfer cases sold to many folks for a while as well.

    A "whore's bizness", truck/automotive, long-since. Loyalty runs one MY to the next, if not one BPA to the next, and the rich get richer.


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    Nowadays in the cars with actual standard autos Aisin and ZF are the two biggest in the game... VW even uses Aisin now, or have for 5+ years. There is nothing GM about that Isuzu. I really like working on the ones with the standard GM V8's in them, so much room for activities with the cab flipped up.

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    Quote Originally Posted by kustomizingkid View Post
    Nowadays in the cars with actual standard autos Aisin and ZF are the two biggest in the game... VW even uses Aisin now, or have for 5+ years. There is nothing GM about that Isuzu. I really like working on the ones with the standard GM V8's in them, so much room for activities with the cab flipped up.
    Aisin is everywhere and ZF surely make the top cut in prestige auto automatics, but..

    "Magna" (formerly Getrag, as-in my "1971 1/2" BMW) are bigger than either one of them as a maker of "transmissions". Whilst ZF specializes in their name-meaning of "toothed wheel", Aisin also makes furniture and advanced electronics.

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    Default OT 4L80E trans. GM? Aisin?

    Jatco (Japanese automatic transmission company) makes a lot of auto trannies for various car builders as well.

    Honda goes the lone wolf way, building their own trannies for most applications. Story goes they didn’t want to pay licensing fees to ZF for their “patented” auto-tranny technology back in the day, so stubborn Honda designed and built their own auto system.

    ( I reckon at one time every maker of auto trannies had to fork over cash to ZF....?)

    Honda’s attempts at tranny building have had varying results over the years...seems they have finally figured out how to build a long-term, reliable automatic.

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    Quote Originally Posted by thermite View Post
    Aisin is everywhere and ZF surely make the top cut in prestige auto automatics, but..

    "Magna" (formerly Getrag, as-in my "1971 1/2" BMW) are bigger than either one of them as a maker of "transmissions". Whilst ZF specializes in their name-meaning of "toothed wheel", Aisin also makes furniture and advanced electronics.
    Definitely the same old Thermite behind the keyboard.

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