I had a '91 Oldsmobile Cutlass Supreme w/ a Quad 4 engine 5 years ago. It had a digital dash display. That was one FUN car, but too bad we had to sell it since it had ignition problems that no one could figure out causing the car to cut out randomly. We dumped $$$ trying to fix that mug.
Anyway, the car had a 3-spd automatic transmission with tq lockup.
It had a floor-mounted shifter, P R N D 2 1.
I had wondered, if it was ok to manually shift one of those automatic transmissions in those cars, or in any cars with the Quad 4 engine. I'm thinking that it would have been more fun in this car.
What I'm talking about is:
You take off and rev the engine way up to almost redline and force 1st to a high speed. Then you flick the lever to "2" and do the same thing forcing 2nd gear to as high a speed as possible. After that, you go into D, DRIVE, to put yourself into 3rd gear, go to whatever speed you like, and then cruise on your merry way.
Then on the HWY, you manually downshift to "2" if you want for quick passing. Then bump it back to "D" to get back to 3rd gear.
When I had my '91 Oldsmobile Cutlass Supreme, though, I never really manually shifted like the above way, but I used to just POP that thing in D1 when going down the highway for quick accelerations at times like from 45 to 60+ MPH. I didn't have a tach, so I had no idea what RPM's the motor turned at. But I used to "do that" because my friend, twice, told me to do so to challenge some vehicles on the highway. One of the times with him, I did it because I was mad, out of anger. I did it two other times for the fun of it.
So, I was asking if it's ok to shift a GM 4T60E automatic transmission like a manual transmission.