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Thread: Engine/trans swap possible?

  1. #1

    Engine/trans swap possible?

    What I have a 2011 Silverado 1500 with a 4.8 and 4l70. I know I can put a 6.2 in there and change ecm parameters no problem. Question is what kind of segment swap or TCM changes would need to be made for a 4L80? I am looking into weather or not the push button T-case will swap from a 4l70 to 4l80. Maybe someone here has done this and can help me avoid pitfalls.

    Thank You
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  2. #2
    Advanced Tuner
    Join Date
    Jun 2010
    Posts
    293
    You can keep the same 4L70 Segment and do the relay method to control the trans, works good, 4l80e has a 32 spline output shaft vs 27 on the 4l60, you will need to find a transfercase with 32 spline input shaft, or swap the input shaft of your current transfercase.

  3. #3
    Good to know on the spline count, thanks.