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Thread: Strength of a stock 4r70w.

  1. #1
    Join Date
    Aug 2014
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    Fort Benning, GA
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    463

    Strength of a stock 4r70w.

    What are these rated for?
    '03 300A Marauder, 107K miles, flowmaster 40 series mufflers, 2nd cats deleted, HID 6000K foglights, SilverStar Ultra's headlights, goodyear gatorback belt, K&N FIPK, K&N drycharger, SS inserts, spoiler, MSD COP's, Nitto Motivo's.

  2. #2
    Join Date
    May 2018
    Location
    Winfield, MO USA
    Age
    43
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    84
    I've done a quick search among multiple forums. What I'm seeing is no more than 350-400 on a stock converter. If you want to go higher than that people are saying total rebuild with stronger clutches, bands, and valve body as well as a multi-clutch torque converter. People are saying the single isn't locking up and eating itself at 450hp.

    Sent from my SAMSUNG-SM-G930A using Tapatalk

  3. #3
    Join Date
    May 2018
    Location
    Winfield, MO USA
    Age
    43
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    84
    This is one source I found.

    https://r.tapatalk.com/shareLink?url...9&share_type=t

    Sent from my SAMSUNG-SM-G930A using Tapatalk

  4. #4
    Join Date
    Sep 2006
    Location
    Psych ward
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    53
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    1,081
    Quote Originally Posted by 01MercGMLS View Post
    I've done a quick search among multiple forums. What I'm seeing is no more than 350-400 on a stock converter. If you want to go higher than that people are saying total rebuild with stronger clutches, bands, and valve body as well as a multi-clutch torque converter. People are saying the single isn't locking up and eating itself at 450hp.

    Sent from my SAMSUNG-SM-G930A using Tapatalk

    stock trans.....450 rwhp...after that its on borrowed time, as for the torque converter....mines still stock but the trans is built and I run 10.7s at 129 no issues!
    • 82 GT coyote swap started
    • 03 300a Marauder, stroked,cammed,T/S Trilogy Supercharged # 216,Best Et 10.77@129.72 on slicks, 93 pump gas. driven to the track.
    • 2011 GT 500, 3.4 whipple,93 pump gas,10.47@133,Driven to the track.
    • 2003 azura blue Mach 1, cobra motor,2.9 Whipple,crusher inlet,built 4r70w trans,04 IRS rear.full weight street car, Corn Fed

  5. #5
    Join Date
    Jul 2004
    Location
    The Dirty South
    Age
    52
    Posts
    3,836
    Definately not 700lbft.

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