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6 Speed Converrsion

Discussion in 'GM Powertrain' started by ChevyHD, Jan 23, 2011.

  1. ChevyHD

    ChevyHD Rockstar 100 Posts

    Does anyone know of a kit or place to where I can get a six speed installed on my truck ? Tranny is acting up so I figured it would help with fuel mileage a lot to get one.
  2. stephan

    stephan Rockstar 4 Years 5000 Posts

    Are you wanting a 6 speed auto or manual?
  3. ChevyHD

    ChevyHD Rockstar 100 Posts

    Automatic. It would be a 4L60 to 6L90 swap. I was looking into gear vendors underdrive/overdrive deal but I'm not sure how it works or if its worth it.
  4. stephan

    stephan Rockstar 4 Years 5000 Posts

    The Gear Vendors under/overdrive is one sweet unit if you can afford it. I researched them indepth & talked to the guy on the phone for half an hour. I couldn't find anything wrong with it. It will split each gear so if you're planning on doing any towing you would definitely benefit from it. The only reason I didn't go with it was the price. Call them up & have them send you the literature on it. It's well detailed on how it works & the gear ratios.

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