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I just bought a new Acadia 2008. My Garage has an inclined ramp and everytime I need to come out in reverse, I have to accelerate my Acadia up to 3,000 rpm in order to start moving up. Transmission gearing seems to be OK, however, I have two more GMC (Equinox and Venture) and both of them start climbing at about 1,500 RPM or less. I took it to the local dealer and they upgraded the software with no changes. Has anyone experienced this same problem?
 

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Most likely it's due to the stall speed of the torque converter. Because the V-6 develops it's torque at a higher rpm than a V-8, the stall speed of the torque converter will be higher. In other words it will rev higher before the vehicle starts to move.
 

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I have noticed the same thing, it took a while to get used to. I was thinking it was due to the vehicle wait and the all-wheel-drive being constantly engaged, maybe not.
 
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