Before I had my 2010 AWD delivered, I told the dealer to load the latest software update for the tranny. Im not sure if they did or not. I have been able to repeat this scenario a couple times now. The basic concept is that the tranny is not shifting into higher gears when you left off the gas or are coasting down a hill. Sometimes it does, sometimes it does not.
For example, i go up a decent hill at about 40, maybe 1/2 mile up, coast about 3/4 mile down. I keep it around 40-45, (40mph is speed limit) When I come down this hill, sometimes it does not upshift when Im coasting. I see my RPMs at almost 2k, if I tap the gas, it finally upshifts and I see my RPMs drop down.
I noticed also, it happened on a flat street, went from 35 mph, let off the gas to coast into the stop sign.. and the RPMs were again, not dropping until I tapped the gas and it dropped.
I wish there was a way to see which gear you were in live on the dash.... And also does anyone know if OnStar can report on your tranny software version?
For example, i go up a decent hill at about 40, maybe 1/2 mile up, coast about 3/4 mile down. I keep it around 40-45, (40mph is speed limit) When I come down this hill, sometimes it does not upshift when Im coasting. I see my RPMs at almost 2k, if I tap the gas, it finally upshifts and I see my RPMs drop down.
I noticed also, it happened on a flat street, went from 35 mph, let off the gas to coast into the stop sign.. and the RPMs were again, not dropping until I tapped the gas and it dropped.
I wish there was a way to see which gear you were in live on the dash.... And also does anyone know if OnStar can report on your tranny software version?