all the time
Yes
It's not recommended to use overdrive on a constant base. It stresses too much the engine as well as transmission.
not recommended overdrive is for cruising at highway speed
You have to use it when you are driving in mountain areas where to have high speed is not a good idea. The overdrive function does allow the transmission to switch to higher gears.
No. Overdrive should be turned off when towing any trailer.
When you are not towing during highway use.
I believe overdrive should automatically be enabled on any car. Overdrive allows a car to drive at fast speeds with low engine input (low revs) resulting in better gas mileage. The downside is that you lose torque. You should be able to turn it off for things like climbing mountains and using engine breaking to go down them. Unless you turn it off, it's already on.
Yes, under most conditions you can use overdrive. If you are pulling a heavy trailer, or the vehicle is heavily loaded, I would recommend you don't. If at anytime you a driving loaded and the transmission starts changing gears constantly, you should disengage the overdrive.
If it has overdrive use it! it is a "highway gear" it will make no difference what so ever until you get up to speed then it will shift into overdrive and save you gas!
Easier to say when NOT to use overdrive - which is basically when pulling heavy loads and traveling in very hilly / mountainous areas.
You could use the overdrive all the time, it cuts down on fuel consumption, with no major noticeable effect on power. If you choose to keep it off... You will need to turn it on when cruising above 40-45 MPH, it's actually the higher gear on the Automatic Transmission, very similar to 5th gear on stick shift.
I am a bit confused. Overdrive is a high gear used for highway purposes. You should always try to use overdrive unless the Jeep is under a heavy load or climbing hills. Thus when towing it's probably best to not to use overdrive.