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400 turbo in a 98 t/a?

This is a discussion on 400 turbo in a 98 t/a? within the Automatic Transmission forums, part of the Drivetrain category; thinking about putting a 400 in my t/a tired of smokin 3 and 4 in this weak ass 4l60. i ...

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    400 turbo in a 98 t/a?

    thinking about putting a 400 in my t/a tired of smokin 3 and 4 in this weak ass 4l60. i have rebuilt it 3 times and the last time i put everything you can get in it. just wondering how much custom work it will take to install 400

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    Member c5z28's Avatar
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    People install th400's in there cars no problem, just a few pieces that have to convert over that I don't the specifics on.

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    Senior Member JaycenK's Avatar
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    Quote Originally Posted by heath26 View Post
    thinking about putting a 400 in my t/a tired of smokin 3 and 4 in this weak ass 4l60. i have rebuilt it 3 times and the last time i put everything you can get in it. just wondering how much custom work it will take to install 400
    What are you breaking and what do you use it for?

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    never taken it to the strip but lots of petal to the floor,what can i say i love the feeling of being pushed back in the seat. clutch packs,bands,sunsheel,valve body,tail shaft housing. they usually last about 5000 to 1oooo miles then the slip starts

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    Senior Member JaycenK's Avatar
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    You will loose over drive if you go the th400 rout. They are tough. For street use the 4l80e might be tough enough for you though

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    Veteran Hi-Po's Avatar
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    I think the only reason most don't go with the 4L80e is cost. A built 4L80E is 3000+ dollars. Not including a stall or any of the many extras. I would trade my m6 for a 4L80E in a heart beat. With a transbrake too please A th400 will install with next to no modifications and will take a lot of abuse, at the cost of losing your OD.

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    Senior Member JaycenK's Avatar
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    Quote Originally Posted by Hi-Po View Post
    I think the only reason most don't go with the 4L80e is cost. A built 4L80E is 3000+ dollars. Not including a stall or any of the many extras. I would trade my m6 for a 4L80E in a heart beat. With a transbrake too please A th400 will install with next to no modifications and will take a lot of abuse, at the cost of losing your OD.
    Yup very true. Ok so back to the original question what all is involved cuase I have not done one personally.

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    Senior Member JaycenK's Avatar
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    Also to the Original poster, are you running a stock rear?

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    Veteran Hi-Po's Avatar
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    Well, I have not done it either. I have read up on the topic for hours as I am always tossing around the idea of kicking the M6. I dont know where else to get this information but these threads. OP, start reading



    http://www.ls1tech.com/forums/automa...th400-faq.html

    http://www.ls1tech.com/forums/automa...g-diagram.html

    http://www.ls1tech.com/forums/automa...questions.html
    370 CI - Twin 6766 Turbo - Jakes stage 5 4L80E - MWC 9" - Holley Dominator

    Build in progress...

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    the 4l80 wont fit without major mods of chassis it much bigger i have checked into that. my rearend is stock housing but the guts are moser and a moser 9 inch setup is next if i can stop throwing money down the tranny

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    Senior Member JaycenK's Avatar
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    Yea good idea, cause as soon as you stop breaking the trans that rear is bound to have some problems.

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    Quote Originally Posted by Hi-Po View Post
    I think the only reason most don't go with the 4L80e is cost. A built 4L80E is 3000+ dollars. Not including a stall or any of the many extras. I would trade my m6 for a 4L80E in a heart beat. With a transbrake too please A th400 will install with next to no modifications and will take a lot of abuse, at the cost of losing your OD.
    Yep, you have to run a seperate trans computer too. A 3-speed is the way to go if it's not a daily driver for sure.

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    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    The 4l80E and the turbo Hydromatic 400 share some of the same internals too.. Just thought I'd add my .02..
    :\Users\Steven\Pictures\d6ftg5nh.gif


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    Why don't people run th350's? Is the length of the 400 similar to the 4l60e? I know the 700r4/4l60e is longer than the th350/200-4r length. The 400 sucks a good bit of power out compared to the 350

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    Quote Originally Posted by wheeliE-maxx View Post
    Why don't people run th350's? Is the length of the 400 similar to the 4l60e? I know the 700r4/4l60e is longer than the th350/200-4r length. The 400 sucks a good bit of power out compared to the 350
    TH400 with a trans brake is the only tranny my buddy could get to work (and not break) behind his 9 second 347 turbo car.

    800+ hp and 750 lbs/ft torque tends to put a hurting on 4L60E's no matter how you build it.

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    Oh, no questions on why not use a 4l60e. Dey shit. But people with fairly mild street cars, a th350 weighs less and saps a good bit less power than a th400

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