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04-19-2021, 03:34 PM | #2 |
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Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,920
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Re: Duramax/Allison downshift?
It's all electronic including the go pedal.
Hit the tow-haul button. The shifting behaviour changes. I often put the shifter in 3 when I'm towing something heavy to keep my 4L80E from hunting or lugging the engine by staying in 4th gear when it really should downshift. If she figures it should be in a lower gear and it isn't going there pull the lever down a notch and drive.
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