Not sure what you mean by "immediately". You do know that overdrive doesn't kick in until 50 mph (80 kmh)?
There are several potential reasons why the transmission in a 1993 Aerostar van won't shift into overdrive. Common issues include low transmission fluid levels, which can affect shifting performance, or a faulty overdrive solenoid that controls the shifting mechanism. Additionally, problems with the vehicle's throttle position sensor or issues with the transmission itself, such as worn components or internal damage, could also prevent the shift into overdrive. It's advisable to have a professional mechanic diagnose the issue for accurate troubleshooting and repair.
The transmition is bad it happened to me its the overdrive selinoid also valve body problem possible, solenoid is on valvebody.
Overdrive is the normally allowed position so there is only one " D " on a 1996 Ford Aerostar If you push the button on the end of the gear selector it will shut off the overdrive feature and " off " lights up on the gear selector lever and it only uses the first 3 forward gears ( Helpfull )
posibbly the overdrive sensor we had a 88 ford aerostar that did the same thing
95 mitsubishi montero sr wont shift to overdrive why
what would transmission not to shift in to overdrive
On a 1998 Ford Taurus ; On the column shift the overdrive button is on the end of the gear shift lever On the console shift the overdrive button is on the drivers side of the gear selector lever below the button you have to press to shift out of PARK
This vehicle has an almost unnoticable shift into overdrive. You will notice your revs go down slightly when it engages. if your car has been stuck in 2nd gear then your transmission has automatically engaged protect mode and you should immediately take your vehicle to a repair shop.
The car needs to go into overdrive unless you are towing something heavy which makes it shift between overdrive and non overdrive. It is better to allow the car to shift into overdrive.
Because it does not have an overdrive gear.
usually it is the overdrive solenoid, but can be the connector to it, input to the computer, or the computer.
Overdrive is the normally allowed position but it won't shift into overdrive until the speed is fast enough