Originally Posted by Jimbo866
I just got back from a 9 hour trip one way on a round trip to NJ from NC. I've noticed a few times while I was going 75 MPH I was only in 7th gear. It wouldn't shift into 8th. So I put it into sport mode and shifted into 8th and went back out of sport and it was working fine for a while. This had happened about 4 times on my trip.
Has anyone else ran into this ?
I did very early on. The transmission would drop to 7th as I'd expect when climbing a slight grade on my commute to work but would fail to upshift back into 8th once the highway leveled off. It would eventually upshift back into 8th anywhere from 1-3 miles down the road or when going down a slight grade. I think the longest it ever stayed stuck in 7th was nearly 6 miles and that was all level highway.
This was well over a year ago. The dealer did some kind of software update (can't remember the TSB) and I never had the problem again.