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4L80E swap for 6 speed?

This is a discussion on 4L80E swap for 6 speed? within the Transmission Tuning. forums, part of the Performance category; hey guys just wanted to see what everyone thinks about this. i have a 99 silverado 2500 6.0 4x4 ECSB ...

  1. #1
    Army EOD matthew86's Avatar
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    4L80E swap for 6 speed?


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    hey guys just wanted to see what everyone thinks about this. i have a 99 silverado 2500 6.0 4x4 ECSB with the 4L80E. theres nothing wrong with the tranny i just prefer a manual. within the near future im looking to do a cam swap and possibly some head work. think the t56 will do ok? anything i should look at to beef up? any other parts i might need to make this work? the guy said it came out of a nbs RCSB 4.8 he swapped it into. heres the ad.

    low-mile, non grindy T-56
    manual x-member and trans mount
    clutch pedal/master assembly
    Z06 slave.
    remote bleeder line.
    pro-5.0 shifter with custom extended handle, and GTO gray leather factory knob.
    ill throw in a stock f-body clutch and flywheel thats in great shape too.

    $1400
    1999 Silverado 2500 ECSB 6.0, AEM brute force intake, Blackbear tune, dual straight pipes

  2. #2
    GMC RULZZ NEUMANNZZ's Avatar
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    Re: 4L80E swap for 6 speed?

    might be an issue with your truck. does it have the hd frame? or standard half ton frame.
    O2 GMC RCSB 4.8L V8 AUTO 3.73's
    rebuilt/beefed up 4L60E(at 43,000miles)
    Matching Ninja 500r


  3. #3
    Registered User para driver's Avatar
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    Re: 4L80E swap for 6 speed?

    if it came out of an f body (Camaro, Trans-Am).. it's probably been pounded a fair bit..
    buyer beware...
    '95 Tahoe LT 4x4, TBI with Vortec crate motor.
    God created all men, and Sam Colt made them equal.

  4. #4
    say i wont Macedawg's Avatar
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    Re: 4L80E swap for 6 speed?

    why not a ZF6..that should bolt right up shouldnt it?

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    Army EOD matthew86's Avatar
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    Re: 4L80E swap for 6 speed?

    Quote Originally Posted by NEUMANNZZ View Post
    might be an issue with your truck. does it have the hd frame? or standard half ton frame.
    hd. are you thinking a clearance issue of some sort? he had it in a half ton nbs if that makes any difference
    1999 Silverado 2500 ECSB 6.0, AEM brute force intake, Blackbear tune, dual straight pipes

  6. #6
    Army EOD matthew86's Avatar
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    Re: 4L80E swap for 6 speed?

    Quote Originally Posted by Macedawg View Post
    why not a ZF6..that should bolt right up shouldnt it?
    well if i had a zf6 with everything i needed to install...maybe...lol. probably a bit more expensive.

    ok if it has been beat what would be parts to replace? forks etc?
    1999 Silverado 2500 ECSB 6.0, AEM brute force intake, Blackbear tune, dual straight pipes

  7. #7
    GMC RULZZ NEUMANNZZ's Avatar
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    Re: 4L80E swap for 6 speed?

    I was thinking the hd frame is different in respects to the crossmember fitment.
    O2 GMC RCSB 4.8L V8 AUTO 3.73's
    rebuilt/beefed up 4L60E(at 43,000miles)
    Matching Ninja 500r


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