TCC Lockup
 

There's been a lot of talk about the TCC and lockup, and reviewing previous threads, I've been thinking about some stuff.

Some agree (as does the car's manual) if you're going to be city driving, manually select the Drive range. This way, the TCC doesn't have to lockup-unlock all the time.

However, in OD the TCC will lock in 3rd, and 4th gear. Therefore, if you live in a city where there are stretches of 30-40 MPH road, I'm almost certain the TCC would lock in 3rd, enhancing gas mileage. Then you have to ask yourself if saving gas is a priority, or risking TCC failure. I haven't heard of many TCC's failing (and think of how many times the TCC lock cycles, compared to how many times your gears cycle), so I'll continue using overdrive.