On my way home from the mall tonight, I punched it at the on ramp (half pedal
) and it shifted around 4,750-4,800. Hard to get an exact reading at 60 miles an hour in the dark
In overdrive, at 3,000 I'd be cruising at 70 so I usually won't be going any higher/faster than 4,500...
But I have an AWD with a different transmission, so unless you were observing shifting at higher RPM before the electrical problem, it doesn't seem like an issue.
What is the code you were getting? Are you still getting it? Post it here and you might get others to help...
Also, flooring it burns a lot of fuel- fun, but expensive.