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  1. R

    Allison 6sp: no 4-5-6th gears

    No this picture does not match. The stator shaft is mounted to the front support. The stator shaft is the large shaft that sticks out the front of the trany and splines into the torque converter.
  2. R

    Allison 6sp: no 4-5-6th gears

    Hi everyone! I am new to this site but not new to the Duramax. I have been fixing vehicles for 11 years. Currently I am working on a customers vehicle. It is a 2009 chevy 2500 HD with the LMM. Fass 150 GPH lift pump and Transgo shift kit. The vehicle has DSP 5 EFIlive custom tuning by Idaho Rob...