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Overdrive
it is to select "overdrive" gear in transmission. mainly for highway driving. if you have both "D" and "D" with circle around it, use "D" for most driving needs.
What are the two d's on the gear shift for>
Driving under normal conditions use "Drive" with circle (highest gear) best fuel economy
The D WITHOUT the circle around it is your 3rd gear, the D WITH the circle around it is your OVERDRIVE gear. The overdrive allows you to get better gas mileage and causes less wear on the engine. But there are times when you should NOT use overdrive, like if you are pulling a trailer up a steady hill, or some snow and icey conditions. If you want to notice the difference, put the car in D WITHOUT the cirlce around it, start out and drive at 50......then as you are going along change it to the D WITH the circle around it and you will feel and hear the difference. The engine revs will come down. It's also the same if you are in Overdrive and you press the throttle completely to the floor, your car will go into a lower gear , the D without the circle, to give you added power and then when you let off the throttle, then transmission will once again shift into Overdrive and the revs will come down and this happens without you changing the gear selector at all. D = Drive: standard drive for transmition engaged, allows for faster transition for a kick-down/passing gear... (D)= Over-Drive is for freeway travel lets the transmition stay in a higher gear for fuel economy (less RPM) the D with out the circle is normal drive wich cause more engine torque. the D with the circle is drive with overdrive wich gives less torque because it allows the transmission to shift to another higher gear.
The " D " with a circle around it ( next to the neutral " N " position ) is the overdrive position . That is the normal position when driving the vehicle , it allows the transmission to shift into the fourth gear ( an overdrive gear ) when you are crusing at a higher speed . When it shifts into overdrive your engine won't rev as high , your gas mileage will be better etcetera
You can try "D" but vehicle should downshift automatically to required gear
The D in circle allows the torque converter to lock improving fuel mileage. In hill country use the D (no circle) in the case of going up and down highway grades.
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The " D " is the drive position so the transmission ( transaxle ) only uses the first ( 3 ) gears and not the overdrive gear ( the 4th gear ) that you normally get if you select the " D " with the circle around it
D with the circle around it.
if it's a 87-93 there is none. overdive is indicated by the D with the circle around it on the gear indicater. when normal driving use this gear. Answer i have a 2001 and its on the shifter