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I have a nissan caravan, so I dont know how overdrive works, please help me!

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If it is automatic then when the engine rpms is set to correspond with the tail shaft rpms then the transmission control module effects a change into over drive
If there is a change in conditions ,such as a loss of vacuum from acceleration , the TCM down shifts out of OD for better acceleration, return to od when things are again in balance
the same on slowing down--the tcm sensors report an imbalance so the tcm keeps shifting down until the car has stopped.

Posted on Apr 08, 2015

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Posted on Jan 02, 2017

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My Nissan caravan overdrive light stays on even when I put it of it gets dim but does not go off completely


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My problem is that it does not take the over drive or 4th gear all time.. i dont know what could be, some times works great but some other starts like tuning off and on the over drive. i check the o/d...


What overdrive does it gives you more revs so you can overtake another car or helps you towing, if i were you i would be looking at your gearbox as the overdrive function uses that to do its job.

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juan: there is a cable which comes from the transmission to the throttle linkage. This is called the TV (throttle valve) cable. This is designed to work in conjunction with the position of the throttle. I'm sure you heard the term "KICK DOWN SWITCH". Well this essentially is doing the same thing. If the cable is out of adjustment, it will have a tendency to want to downshift into 3rd.
Even though overdrive is electrically actuated, it can be disengaged by the throttle position.
There is also a coolant temp sensor which keeps the transmission from shifting into overdrive until the coolant temperature reaches a certain point. The sensor tells the ECM to tell the Solenoid it's ok to supply a ground to it.
Your overdrive switch provides a ground to actuate the overdrive solenoid. Make sure the switch has a solid ground serving the circuit.
The torque converter solenoid picks up it's ground from the ECM.
Both solenoids are served by the same power source which is a switched circuit through the ignition.
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Overdrive doesn't work in my 1997 nissan maxima


no there are two wires running up your gear shifter, they have come loose. mine did the same thing so i hooked them to a toggle and its worked right since

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Tranny problems


Well, you say the noise is in 1st, 2nd, 3rd, and 5th, and I assume this is an overdrive tranny with the overdrive in 5th.

This means your 4th gear is more than probably direct (1:1) ratio.

Meaning you have a bad countershaft bearing(s), or gears...

In direct, your countershaft still spins but carries no power/torque to the wheels (it is basically just freewheeling), input shaft speed/torque goes directly/is locked to the output shaft, so you don't hear the noise; in any other gear, where the countershaft bears a load, you hear the bad bearing or gears.

Either way your tranny has serious internal issues and needs to be rebuilt before it destroys itself.

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02 caravan with 3.3 w o/d shifts down hard from overdrive when stepping on brake


try having the fluid changed and if that dont work then try rebuilding ur valvebody

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When you let up and accelerate again, what are the engine rpm's? Do you have a tach. in your car? Please let me know. It'll help me with your problem.

Jul 17, 2008 | 1993 Nissan Maxima

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