Question about 1991 Nissan 300ZX

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I am also fixya help tech on electronic area. my 1991 300zx has overdrive problems. often the 4 gear will kick out and down shift to 3rd (auto). it keeps kicking in and out of OD. any suggestions?

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  • Nissan Master
  • 42,687 Answers

When a tranny has this sort of problem the modular unit or actuator piston is registering the tailshaft/ engine speed ratio at the point when a shift is required. Have a auto shop check the pressures in the tranny as it may be a mechanical adjustment problem or if electrical it may be the wires in the oil or the unit itself

Posted on Jan 12, 2013

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Posted on Jan 02, 2017

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SOURCE: Overdrive button on shift knob doesn't work

Most likely the turning on and off might have trigered or burned out your relay switch located in the front of your engine. The overdrive button on your nissan was only ment to be used sporadically and not as a stick vehicle ( According to your expression ). You can purchase this relay in your nearest nissan dealer. Good luck.

Posted on Dec 17, 2008

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SOURCE: 1999 nissan frontier overdrive problem

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.
I hope I have shed some new light on your problem and given you some new direction in which to look. I hope I have helped you resolve your problem. If not, I'll be watching and will be ready to offer more help if needed. ..mybunkey

Posted on Apr 16, 2009

  • 1 Answer

SOURCE: 2007 nissan titan, electronic gear shifter inop

hi
my nissan titan 2007 batery died then i put new batery in but still cant trun on ????

Posted on Jun 27, 2009

czaa
  • 4521 Answers

SOURCE: 1990 Nissan 300zx w/ shifting issue

well Im sure theres a ton of miles on it-do u perform reg maint like checkin fluid level-u may need the throttle cable ajusted that hooks to trans-band n clutch could be out of measure too--trans hydra-valve system could be worn--see all these things effect the way the fluid makes the gears move--a pressure test can confirm an aging trans

Posted on Sep 19, 2009

  • 5 Answers

SOURCE: 2000 maxima with no overdrive and code po744

This code indicates a mechanical problem inside the transmission. Likely in the valve body or the torque converter. He is a description of the cause and a list of possible problems. To diagnose this you need a scan tool capable of reading the trans control module and a pressure guage to read the fluid pressure.

Posted on Dec 03, 2009

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1 Answer

1993 jeep grand cherokee is stuck in second gear, the overdrive button is not functioning, and getting the data control center says service 4wd switch


wow no engine size stated, the 5.2L run a special trans... so....
hopeless to help you much.
zj jeep with automatic.
it didnt lie, it told you to service it, so take it to a shop and let the work on this old dog..
stuck , now what does that mean.
the shift lever lever stuck, or its cable failing end to end.? or?
or shifts from 1 to 2 and hangs there.
or down shifts from 3 to 2 and and hangs there
DIY ? question is that it? you never said intentions.....
so we open the 93 ZJ book and what do we see.
ax-15 stick box, seems not.
the aw-4 auto , electronically shifted with TSM (scan it yet?)
and the 46RH auto. used on the 5.2L, has no TCM brain.
its a Hydramatic.
here are the OD words off the 46h page

Overdrive Control Switch
The overdrive control switch is located in the instrument
panel. In the On position, automatic shifts
into fourth gear overdrive will occur. In the Off position,
the switch overrides the powertrain control module
preventing a shift to overdrive fourth gear range.
The switch has an indicator light that illuminates
when overdrive is turned off. The switch also resets
when the ignition key is turned to the OFF position
so that the automatic overdrive feature is restored.
The use of fault codes is employed to help diagnose
the electronic components that operate the overdrive
unit and torque converter clutch.

Jul 16, 2016 | 1993 Jeep Grand Cherokee

1 Answer

TRANSMISSION


Fuse # 20 or 21 gets power through ignition. This fuse controls PRNDL indicator, speedometer, tach, & will cause transmission to not shift gears correctly. Ours took off in 3rd gear when put in Overdrive & only ran in 3rd gear. If we tried to manually shift thru gears (auto trans), it had 1st, 3rd, reverse. No 2nd or over drive. Replaced ignition. Fixed problem. Root problem was Electric motor that engaged 4 wheel low side was bad. Every time we used 4 Low side it threw power surge through ignition & blew ignition out. Good Luck.

Feb 06, 2014 | 1997 Chevrolet K1500

1 Answer

What does this shifting means..3,2,1 on automatic transmission range rover 2.5. Can you still shift the gear from D to 3 while the car is in motion...?


Yes, you can shift while the car is in motion. It works in a similar manner as a manual transmission, except that there is no clutch. Your car has 4 gears + overdrive. 1, 2, 3, 4=D, 5= Overdrive. So if you're on the highway and you shift into 3rd, you're down-shifting twice (from 5th to 3rd). The car will downshift itself if you hit the gas hard enough though! So, yes, you can shift from D to 3 while the car is in motion. No problem. Alex

May 31, 2011 | Land Rover Range Rover Cars & Trucks

1 Answer

I have a 1999 jeep cherokee that has intermitant transmission problems 1)shifting up it wind out to 2k-3k before shifting 2) at higher speed it feels as if it slips out of overdrive rpm increase but speed...


It will shift out of overdrive upon increasing throttle , pulling hills and so on. Your overdrive probably kicks in around 35 to 45mph and kicks back out as you increase throttle. Electrically controled speed sensor to control the response. Overwise the engine would bog down to a stall. Over drive is just that. It changes the gearing ratio to over drive meaning less then final gear 4 to 1 down to 4 to 3 etc more direct drive ratio to lessen consumtion of fuel with less stress on engine. Have shift speed sensor adjusted. Don't drive in overdrive in city if most driving is under 45mph

Mar 09, 2010 | 1999 Jeep Cherokee

1 Answer

4l60e going from 1st to 3rd and dont have overdrive any more


You most likely have a broken sunshell inside the transmission. They tend to go out when the transmission is shifted to drive when while still rolling in reverse.

Dec 28, 2009 | 1994 Chevrolet C1500

1 Answer

1999 nissan frontier overdrive problem


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.
I hope I have shed some new light on your problem and given you some new direction in which to look. I hope I have helped you resolve your problem. If not, I'll be watching and will be ready to offer more help if needed. ..mybunkey

Apr 10, 2009 | 1999 Nissan Frontier

2 Answers

95 GMC Jimmy 4L60E no 2nd or OD 4L60E


You might want to try this if its got a kick down cable unhook it from throutle body and pull it out as far as you can and let it snap back, do this a few of times, sometimes a valve gets hung up inside valve body of trans. and won't let it shift. If that don't help you may have to pull pan to dislodge it if thats the problem. chk. the plug on trans. (Its a 4 wire white plug) with test light with key on to see if there is power down there one will be hot, thats for overdrive, now on top of intake in front throutle body there is a sending unit that looks like a temp. sending unit with a 2 wire plug on it that sends a signial down to that plug when engine gets to temp. to let it shift to overdrive. Maybe this will help, or give you some ideas.

Mar 02, 2009 | 1995 GMC Jimmy

1 Answer

Overdrive factors


When the car is just cruising along at approx.50+ MPH push the O/D button. You should feel the gears change higher and if you have an RPM guage then it should drop as well to fewer RPMs. This would be normal driving conditions. O/D will not kick in until the last regular gear (3rd or 4th depending on model)  had been shifted into. O/D automatically kicks out when slowing down and the transmission shifts to a lower gear. Thus the O/D has no function at slower speeds/gears and does not need to be shifted ( on or off ) except in the very first example given here.

Feb 26, 2009 | 1993 Toyota Corolla

1 Answer

1996 3500 TRUCK WON'T SHIFT OUT OF SECOND INTO 3RD OR OVERDRIVE


Their are a few possible causes of this. One their is not enough tranny fluid in it or the kick down cable is not hooked up properly. the kick down cable also runs the vacume to the transmission.

Check theese and give me feed back to further assist you.

Thanks, Charlie

Jan 29, 2009 | 1996 Chevrolet C/K 3500

1 Answer

2002 Chevrolet Silverado 4X4 1500 Pickup irregular shifting


Try adjusting the neutral safety switch on the side of the transmission.

Apr 10, 2017 | 2002 Chevrolet Tracker

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