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I am running 285/75/16's on this thing and will be running my 35x12.5x20 when the weather clears around her. Do I need to change my shift points once I put my tuner in? I am a little leary of doing this because I had my 02HD 6.0 4l80e trani grenade on me and I am pretty sure it had to do with the hypertech programmer I had in it. I know comparing the dmax/allison to the 6.0/4l80e is like comparing apples to oranges but just curious what you guys had for thoughts on this issue.
 
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