Want this question answered?
Overdrive is for highway driving, which is great for gas mileage. Also, not to use overdrive when going up or down hills because it makes your transmission work harder. That's what I was told anyways.
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.
Unless you are towing something or encountering steep hills (do you live in San Fran?), you should always be in overdrive. The lock-up into overdrive won't occur unless you are going fast enough, anyway, so there is no reason not to keep the gear selector in OD.
Going up hills doesn't allow engine to "lug" and overheat Going down hills supplies engine braking for safety and will prevent brakes from fading and overheating
Overdrive is the normally allowed position . It won't shift into overdrive until the speed is fast enough anyway , but if you are going up and down hills and the transmission keeps downshifting you might as well turn the overdrive feature off until you are out of the hills Just adding to the answer : Also if you are towing something you want to shut off the overdrive
if the vehicle is running properly(regular maintanance, tune-ups etc..), you have to downshift on inclines if your vehicle is standard shift. if automatic, disengage overdrive while going up hills.
It should be on for best gas mileage under normal driving conditions, If towing a large load up hills and through town, it should be off.
The transmission defaults to overdrive, as well as enabling the 4th gear. There is a button on the end of the shifter that disables overdrive for times when it is rapid switching between 3/4th gear due to a certain speed etc. It can also be disabled to assist going up large hills for example or by improving engine braking properties. For normal use OD should be left on as is.
I tow an 18.5' Bayliner with a 2004 Grand Cherokee Freedom Edition 4x4 with a 4.7 H.O., tow pkg. and heavy duty cooling pkg. The boat is considerably under the rated tow capacity but I always turn off the overdrive especially going up and down hills. Jeep recommends to do so if you are towing and the overdrive is constantly kicking in and out; if you do not you will burn out the overdrive unit and transmission. Hope this helps.
Curves with hills, especially after a long straight part of the highway.
For most drivers, Overdrive should be used full time. Its designed to reduce the amount of effort the engine needs to maintain speed. Whenever a lot of shifting is taking place, its recommended to only used Drive. Roads with a lot of hills, curves, or heavy traffic areas should not use overdrive to prevent damage to the transmission. Also, disengage overdrive whenever towing. There is not enough torque generated by the engine to tow while in overdrive. Towing while overdrive is engaged can cause damage to the engine and transmission.
The address of the Vestavia Hills Library In The Forest is: 1221 Montgomery Highway, Vestavia Hills, 35216 2797