i read out a 2005 8.1 with a allison 5 speed tcm i changed a few thing such as the part throttle mph i went to do a partial flash an it said calibration possably no good or not reconized may put the tcm in unknown state Attachment 12461
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i read out a 2005 8.1 with a allison 5 speed tcm i changed a few thing such as the part throttle mph i went to do a partial flash an it said calibration possably no good or not reconized may put the tcm in unknown state Attachment 12461