I am noticing much larger variations in my RPM while maintaining constant MPH then I did in the past (true with cruse on or off).
When driving a constant speed, say 65mph in overdrive, the tac reads
2600rpm when driving in flat no-load conditions.When I come to a hill the tac will clime to 3000rpm (a 400 RPM increase) as throttle is needed to maintain the same speed (true with cruse or foot).
The RPM's a few years ago, unless my mind is playing tricks on me, would change only 100 or 200 RPM as throttle was added. Now days it is a good 400 RPM increase.
At some point the transmission will down-shift out of overdrive just fine... no issues there. I just notice the higher RPM's before the shift... AND I think I notice higher RPM's after the shift (do not have good numbers on this however).
Do I have a problem coming? Is my torque converter unhappy?
((FYI... in the more distant past I was having the tran temp light come on a once or twice a year when driving highway speeds in the Mountains outside of Denver on hot days. Would have high RMP's too. But the Tran cooler fixed that right up. My issue now is generic around town driving.))
Thx Dave-in-Denver