Question about 1990 Nissan 300ZX

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My 1990 300 ZX (non turbo) often fails to shift into overdrive at the proper time (according to the engine sound) eventually it may engage OD in a mile or less and often it goes for 20 or more miles before it shifts up. What might the problem be? Is there a solution?

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The problem could be a faulty switch itself...perhaps the fluid level is low..check it out and make sure its full and is good in color as well...then try to flush it and see if its an automatic car..

Posted on Nov 14, 2009

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1 Answer

Engine light code says gear 4 out of ratio. I was told it was the OD going out. Do I have to replace the entire transmission, or can I just have the OD fixed?


Overdrive is actually inside the torque converter. Look at the transmission control module. Have it tested for proper operation first. There is a solenoid inside the transmission on the valve body that the module operated. Since you didn't get a fail on the solenoid, the OD clutches may be worn enough to slip. No need to replace the entire transmission, just the torque converter.

Jan 22, 2017 | Cars & Trucks

1 Answer

1996 honda accord wont shift into overdrive


For Automatic transmission problem,click the link below:----Overdrive light in the dash blinks? http://repairhelpcenter.blogspot.com/2012/01/overdrive-light-in-dash-blinks.html
--------- Automatic transmission troubleshooting:----

http://howtobyme.blogspot.com/2011/11/automatic-transmission-will-not-go-into.html

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Automatic transmission shift lever issues?-------

http://technoanswers.blogspot.com/2012/01/automatic-transmission-shift-lever-hard.html

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AUTOMATIC TRANSMISSION FLUID LEVEL? --

http://schematicsdiagram.blogspot.com/2011/07/how-to-check-automatic-transmission.html

--------------

AUTOMATIC TRANSMISSION FLUID AND FILTER?

http://schematicsdiagram.blogspot.com/2011/07/how-to-change-automatic-transmission.html

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Transmission fault light on car dash?

http://schematicsdiagram.blogspot.com/2011/12/transmission-fault-light-on-car-dash.html

--------
Transmission shifting problem?

http://schematicsdiagram.blogspot.com/2012/01/transmission-shifting-problem-on-toyota.html

--------
Transmission Slips out of 2nd gear?

http://repairhelpcenter.blogspot.in/2012/02/transmission-slips-out-of-2nd-gear.html

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OD light flashing and transmission fluid leaking?

http://repairhelpcenter.blogspot.in/2012/02/od-light-flashing-and-transmission.html

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Why Transmission fluid leaks near radiator?

http://repairhelpcenter.blogspot.in/2012/02/transmission-fluid-leaks-near-radiator.html

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Transmission fluid leaking?

http://technoanswers.blogspot.in/2012/02/ford-windstar-transmission-fluid.html

-------------
****** wont go in reverse?

http://technoanswers.blogspot.in/2012/02/dodge-neon-wont-go-in-reverse.html

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Automatic transmission will not go into reverse?

http://technoanswers.blogspot.in/2012/02/dodge-automatic-transmission-will-not.html

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Transmission is making buzzing noise?

http://technoanswers.blogspot.in/2012/02/transmission-is-making-buzzing-noise.html

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This will help.

Thanks.

Mar 04, 2012 | 1996 Honda Accord

1 Answer

Should I keep overdrive on or off? also should keep ECT on or off?


Hello. Welcome to FixYa. I am Toyota Ed, and I will be assisting you today.

The Overdrive function allows the transmission to shift an extra time, sort of like selecting 5th gear in a 5 speed manual transmission. The Overdrive, when used, will save you gas, as the engine is no longer maintaining a high RPM at normal driving speed. Look at the tach whilst driving about 45 mph, and engage/disengage the OD. You will see the tach RPM raise when the OD is off.
More RPM = lower fuel mileage,

The ECT is a different circumstance. The ECT button is used primarily when you have a heavy load in the car, or are towing something. All the ECT button does, when it is engaged, is lengthen the shift points as the transmission upshifts. Normally, the transaxle will shift into 2nd gear at 18-21 mph. When the ECT is engaged, the transaxle will shift in the area of 22 -24 mph. In short, the ECT just makes the time to the 1-2 and the 2-3 upshift longer, to compensate for the additional load being carried/towed.

I hope my assistance answers your question.

Thanks for choosing FixYa today!

Feb 04, 2011 | 1996 Toyota Camry

1 Answer

Transmission will not shift into overdrive on a 2003 4.7L Jeep


This will not repair the problem but it will cause your OD to shift. Caution: you need a long stretch of highway and sparse traffic.
After trying everything I could think of, I noticed that when the automatic locks failed to engage (at around 15mph) that's when the transmission would not shift into OD. So, now when the locks don't lock and the transmission doesn't shift to OD, I put the transmission in neutral and turn off the ignition and let it coast to a slow speed (see above caution). When I start the engine again and put the transmission back into drive, the locks engage and so does the OD. Works for me. I'm currently doing research on what causes the locks to engage automatically. I'm thinking it will be a vacum or a switch. BTW, mannually engaging the locks will not work. Good luck. Hope it works for you.

Jan 12, 2011 | 2003 Jeep Grand Cherokee

1 Answer

My Paseo's overdrive does not start working until a mile down the road. It was worse during the winter and we changed the filter and fluid. But the problem is still there. It has something to do with...


Hello. My name is Toyota Ed. Please allow me to assist you.

The truth is, your Paseo is working properly.

To lessen emissions, Toyota does not allow the overdrive to engage until the engine temperature reaches 177 degrees F.

The "OD allowed" temperature is determined by the coolant temperature sensor on the engine. This sensor prevents the computer from allowing the OD to engage until the 177 degree threshold is met.The warmer the coolant is, like in the summer, the faster the 177 degree plateau is reached. In colder temps, like in winter, it takes much longer for the coolant to warm up to the desired temperature, thusly taking longer to shift into OD.

If the overdrive engaged before 177, cold-engine emissions are more abundant.

There is nothing that can be done to change the point at when the OD is permitted to shift.

So, your car is in excellent working condition. Nothing to worry about, now that you understand the basic design.

Thank you very much for choosing FixYa for assistance today. I hope that my input proves useful to you. If so, a 4-thumbs up rating form you would be greatly appreciated.

Have a great day.

Jul 29, 2010 | 1994 Toyota Paseo

1 Answer

What does the overdrive on off switch do? If I don't have it on my 1989 mitsubishi galant winds out in third and wont go to fourth


The overdrive switch allows you to manually keep the transmission from going in to OD. This can be usefull when driving up steep grades and the transmission has to continually down shift for better engine torgue. Also very useful when towing a trailer to keep the engine RPMs up for better towing ability. The transmissions on the cars also use a temperature switch, here in WI the car (with Mitsubishis) will not shift in to OD until the engine meets a given temp. If your temp switch has failed the tranny cannot go in to OD, there should be a OD relay too which should be inspected and lastly the OD solenoid which engages the OD, if it failed no go. Also be certain to keep your tranny oil in top form with the Mitsubishi's, their trans-axels are quite sentitive to failing tranny fluid (poor viscocity) if the fluid is old/dirty good practice to go ahead and replace it with filter.

I hope this may have assited you,
Tom

Apr 12, 2010 | 1989 Mitsubishi Galant

2 Answers

Car will not shift into overdrive


As a response to solution #1 these cars do have an overdrive while in D-4, mine was shifting in and out at 70 mph until it finally quit and the rpm is now 3100 at 70 mph insted of 2700. The car still shifts 4 full times just not the fifth-OD. I still can't find out what fixes this problem either.

Jun 09, 2009 | 1993 Honda Accord

1 Answer

2001 honda accord will not go into overdrive


Ok, make sure the tcm is connected properly. there is a o/d shift solenoid that is controlled by this device(tcm/pcm). if the wires and module aren't connected properly or, if the tcm/pcm is malfunctioning, it will render the OD inoperable. inspect the tcm and wires on the trans for correct connections and fit. test the module for its operational value and, pull the pan on the trans to test the OD shift solenoid as well.

May 26, 2009 | 2000 Hyundai Accent

1 Answer

OD light on 97 Jeep comes on when it's cold outside


Calvin...... You need to treat your Jeep to a new THERMOSTAT. The Overdrive is connected to the engine coolant temperature and if the engine is n ot warmed up properly, the Overdrive will not engage. Try to get a thermostat from the Jeep dealer so you will have exactly the right one, some of the cheapoie ones will not work right. Dave in Iowa

Jan 29, 2009 | 1997 Jeep Grand Cherokee

1 Answer

Error codes


Her is the definition and a list of possiable causes.


Code P1740-Torque converter clutch did not lock up when the PCM sent the command. Enabling conditions: No engine or transmissions codes are present, vehicle speed was under 70 MPH, TPS was under 33% open. When the PCM commanded the torque converter to lock, no change was detected in engine speed. Blocking action: This code can block the following monitors: none.
Testing: Check torque converter solenoid for proper operation.
P1740 TCC O/D SOL PERFORMANCE (GAS)
Theory of Operation
The Torque Converter Clutch (TCC) Solenoid is used to engage the TCC which improves fuel economy.
When Monitored
The Torque Convertor Clutch (TCC) and Overdrive Clutch (OD) will be tested each time the PCM requests TCC engagement in 3rd gear and OD.
Set Condition
The DTC will set if the expected RPM drop is not achieved while attempting to engage TCC or OD. This indicates a malfunctioning torque convertor or overdrive clutch.
Possible Causes
* ENGINE DTCS PRESENT
* TRANSMISSION DTCS PRESENT
* TRANSMISSION TEMPERATURE TOO COLD
* OIL PAN CONTAINS EXCESSIVE DEBRIS
* 3-4 SHIFT SOLENOID
* SHAFT OR SEAL DAMAGE
* TCC SOLENOID
* TORQUE CONVERTER

Sep 25, 2008 | 2005 Dodge Ram 3500

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