We travel some 1600 miles yearly to AZ via CO & NM where some 700 miles is above the altitude of 4300 ft. Above that approximate elevation the transmission will not automatically upshift from 8th to 9th - ever! After every downshift, which are many (estimate 50-75). I can be back on the level or even on down slope, still no upshift. So I watch the rpm and paddle shift up when the need is noted. There's about a 200 rpm difference.
Last April on the way home through Denver, I took it to Planet Honda who could find no fault codes, had never herd of such a problem, and took it for a drive and declared it "shifting normally". Well, they never obviously got far enough out of town to duplicate the ups and downs of mountain interstate 75-80 mph cruising. I wasn't 15 miles east of Denver the next morning and the same routine remained for about 100 miles until I was back below 4300 ft.
I'm 800 miles from Denver, and trying to get help from Honda USA Customer Service is a hopeless cause, as they insist I must only use a dealer. Well, I can't be chasing off to a dealer 800 miles away, I am only there 2 days on our way through, and the dealer has to submit "testing" data to Honda to get any assistance on a solutions. I think I'm screwed into driving a semi-manual shift automatic shift. I'll take it in again Dec 30 on out way, insist they let me ride along and their test drive, and see what they say, Maybe I can simulate the issue with a paddle downshift, after which I don't think it will shift back up.
A D V E R T I S E M E N T S
We travel some 1600 miles yearly to AZ via CO & NM where some 700 miles is above the altitude of 4300 ft. Above that approximate elevation the transmission will not automatically upshift from 8th to 9th - ever! After every downshift, which are many (estimate 50-75). I can be back on the level or even on down slope, still no upshift. So I watch the rpm and paddle shift up when the need is noted. There's about a 200 rpm difference.
Last April on the way home through Denver, I took it to Planet Honda who could find no fault codes, had never herd of such a problem, and took it for a drive and declared it "shifting normally". Well, they never obviously got far enough out of town to duplicate the ups and downs of mountain interstate 75-80 mph cruising. I wasn't 15 miles east of Denver the next morning and the same routine remained for about 100 miles until I was back below 4300 ft.
I'm 800 miles from Denver, and trying to get help from Honda USA Customer Service is a hopeless cause, as they insist I must only use a dealer. Well, I can't be chasing off to a dealer 800 miles away, I am only there 2 days on our way through, and the dealer has to submit "testing" data to Honda to get any assistance on a solutions. I think I'm screwed into driving a semi-manual shift automatic shift. I'll take it in again Dec 30 on out way, insist they let me ride along and their test drive, and see what they say, Maybe I can simulate the issue with a paddle downshift, after which I don't think it will shift back up.
- jerrylrsn, Cedar Falls, US