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  1. 2007.5 lmm smoky

    Can you make an Allison 5-speed into a 6-speed would switching the valve body bell housing and...

    Can you make an Allison 5-speed into a 6-speed would switching the valve body bell housing and the tail shaft cover or adapter wondering because I have a stage 5 transmission and torque converter 5 speed and now I have a 2007.5 Duramax with a 6-speed want to put that transmission in the new...
  2. 2007.5 lmm smoky

    5 speed to 6 speed swap?

    I have a question about the Allison transmissions I have a stage 5 Allison 1000 weather a stage 5 3des revmax torque converter from my 2002 Chevy now I have boughten a 2007.5 GMC 2500 HD with the six-speed I have heard that you can change the bellhousing valve body and the tell adapter to the...