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Thread: 4L60 shafts

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  1. #1
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    you should feel the abuse my trans gets, the 80e bangs between every gear even when going slow and I've never broke a shaft in it. I did mess up a roller clutch set internally after about 300 launches on the bottle at the strip. I changed the design of how the roller clutch works internally and haven't had any issues since. Maybe you need to put the stock servos back in the trans to keep from killing shafts?
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  2. #2
    Join Date
    Jul 2008
    Location
    The Garage
    Posts
    1,330
    Well I like the way my trans drives and I haven't broken any shafts. The output shaft is just my only big concern with my current setup because I know it's the real weak link. I usually play things safe and I know the 60E's output shaft is LONG and not very thick, therefore it can't handle a ton of torque especially in a heavy truck. I will, however, be sure to contact you if I am ever graced with the opportunity to swap in an 80E.

    ~ Forged engine of some type ~ Ball bearing turbo of an unconfirmed size ~ 4L8000 trans ~ Beefy fuel system ~

  3. #3
    Join Date
    Jun 2008
    Posts
    5
    With your weight, anything over 400rwhp is on borrowed time with a stock shaft. They can and have lived way beyond that, it's just not reliable past that. They way the trans is setup can also dictate the life of it.

  4. #4
    Join Date
    Jul 2008
    Location
    The Garage
    Posts
    1,330
    Quote Originally Posted by built408 View Post
    With your weight, anything over 400rwhp is on borrowed time with a stock shaft. They can and have lived way beyond that, it's just not reliable past that. They way the trans is setup can also dictate the life of it.
    Are you saying that with the FLT lvl 4 4L60 I have in it, that the OUTPUT SHAFT might last longer??????

    ~ Forged engine of some type ~ Ball bearing turbo of an unconfirmed size ~ 4L8000 trans ~ Beefy fuel system ~

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