3rd v. overdrive

I have a 1997 LeSabre,69,000, Should I drive around town in traffic in 3rd instead of overdrive and just use od on the highway?? Is one way or the other better for the transmission??

use OD, around town, you probably wont hit overdrive speeds, if you do, and you need some hill climbing power, tap the gas harder for a moment and bring it back, the tranny will kickdown to 3rd and give you the climbing power.

That's true. Used to be a time when driveability in O/D was a big issue in town. With fully computerized transmissions shifting manualy is not a concern unless you are stuck.