We bought a 2014 Seneca 37TS in 11/2013, and are on our second short trip. When accelerating or just cruising (usually, but not always uphill), the transmission drops into a lower gear.
I am reduced to and stuck at 35 or 45 mph, the rpms are high (2,500 - 2,800), and the engine is revving. I back off the accelerator, but that doesn't seem to help. I have power, but the noise is is a high-pitched whine and I'm in a low gear. Finally there is an air release sound and everything goes back to normal.
The rpms are very high at highway speeds, too, unless we are in OD. Any suggestions? We will take it to the dealer to look at, but we have some driving ahead of us in the next two days. I'm a woman who used to take engines apart before things got complicated, so be easy on me!