Question about 2000 Isuzu Trooper

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The dash transmission indicator changes without any gear change

Intermittently the transmission indicator starts moving between P, N, D, 2, 1 without any pattern and the transmission "KLUNKS" in the lower gears.

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Trans nuetral saftey swich needs replacing
internal switch contacts are shorting together causing the PRND21 lights to move when this happens the trans ECU doesnt know what gear its in which causes clunky shifts and can lead to check engine light coming on

Posted on Jul 01, 2009

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My 2004 Mazda 2 automatic is intermittently juddering when changing gear, any ideas?


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My vehicle was moving then later indicate neutral and stop I try to engage the gear but the vehicle won't move why


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Gear shift moves but indicator doesn't change and transmission doesn't engage.


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Jan 31, 2013 | 2002 Nissan Maxima

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Gear shift locks and car will not start


For Automatic transmission problem,click the link below:---- 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

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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

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Transmission shifting problem?

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

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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?

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

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****** 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.

Feb 19, 2012 | 1999 Toyota Camry

2 Answers

My 1993 Gmc Sierra 2500 automatic first gear shifts hard also from park to drive others gears are smooth i have overdrive


The gear shift lever indicators tell you what gear you have an automatic transmission in on your vehicle. The shift solenoid tells the transmission when to shift gears and what gear to shift into. Newer model automatic transmissions have electronic shift solenoids that are activated and change gears based on the speed the vehicle is traveling. Troubleshooting either one of these transmission components is relatively easy if you know a little about automobile mechanics. With the right tools, you can determine whether the transmission shift solenoid is having a problem. Gear shift indicator problems can be determined simply by moving the gears into their designated position.
Transmission Shift Solenoid
  • 1 Raise each corner of the vehicle up with the car jack and place jack stands under the frame. Make sure the car is raised high enough so you can work under the car freely.
  • 2 Slide the drain pan under the transmission fluid drain plug. Remove the drain plug with a ratchet and socket, and let all the fluid drain out of the transmission. Remove the transmission pan bolts with a ratchet and socket. Pull the pan away from the bottom of the transmission, revealing the transmission shift solenoid.
  • 3 Wipe off the shift solenoid with a shop towel. Disconnect one of the two plugs that attaches to the shift solenoid. Turn the knob on the volt meter to the ohms setting, so resistance can be measured. Set the volt meter on 200.
  • 4 Take the black lead of the volt meter and touch the negative battery terminal wire. Take the red lead of volt meter and slide the tip into the terminal plug you just disconnected from the shift solenoid. Look at the reading you get on the digital display of your volt meter. Determine if the reading is between 12 and 25. Readings below 12 or above 25 tell you that the shift solenoid is not working. Reattach the plug to the shift solenoid and pull the second plug attached to the solenoid. Perform the same procedures on this plug wire. Replace the transmission shift solenoid after determining it is bad.
Gear Shift Indicator
  • 1 Move the gear shift into the desired gear. Look at the gear labels and the arrow, or other indicator, to see if the gear shift indicator lines up with the selected gear.
  • 2 Move the gear lever to another gear and look to see if the indicator lines up with the selected gear. Misalignment of the arrow will tell you if there is a problem. Moving the gear shift to "neutral" but having the indicator show the transmission is in "drive" tells you the gear shift indicator is not working properly.
  • 3 Try each gear position to determine how much misalignment is in the indicator. Slide under the car and check for a loose gear shift cable. Check all the gear shift cable connections to ensure they are all tight and are not missing. Tighten any loose gear shift cable clamps or bolts. Replace the gear shift cable if you find that this is causing the misalignment with the gear shift indicator.

Feb 02, 2012 | 1993 GMC Sierra

1 Answer

Toyota Vista SV50 model / year 1999: I have used Dextron type 2 automatic fluid in the auto transmission. Could this be the problem for auto gears sticking in same gear too long when car is started in...


Hi, since you use a dextron type 2 automatic fluid then it is not cause of the sticking gear. Rather it should be as a result of a clogged transmission filter. A clogged transmission filtercan cause problems with changing gears because it will not allow the fluid to pass through the valve body or valve solenoids at the proper pressure. Without pressure, the plates won't move properly and you won't be able to easily change gears. This can be symptomatic either by itself or along with burnt or worn out transmission fluid, and both should generally be replaced at the same time, rather than just replacing one or the other.

Jul 22, 2011 | Toyota Camry Cars & Trucks

1 Answer

Dash indicates transmission is always in Drive. Transmission shifts through all gears but indicator does not change. Vehicle will not start.


You have a electronic Shift indicator switch on your transmission this is also called th NSBU switch. This is what tells your instrument cluster what gear you have selected. This may be your problem. or you may have a loose or bad connection. NSBU stands for neutral safety Back up switch.

Feb 06, 2011 | 2002 Buick Century

1 Answer

2000 KIA Spectra/Shuma 1.5 Auto Transmission not changing gear. Hi, My auto transmission just started giving problem 2 days ago. First time I notice the problem is when moving off from stop in "D", the...


It is the prnd indicator switch on the shift shaft of the transmission,or a shift solenoid,or the valves are sticking in the valve body,try some lube guard,added to the transmission,it is great for stuck valves.

Apr 24, 2010 | 2003 Kia Spectra

2 Answers

My volvo 850 transmition cut out on me. For a while the arrow on the dash was blinking and it would switch to limp mode. I brought it in to be looked at and they didn't find a problem. Last time it...


Any time the transmission goes into the limp mode, it generates an error code that tells what caused it to go into limp mode. It could be something as simple as a loose connection on a sensor for the transmission computer. The code would explain which sensor was sending the correct signal.
By restarting the car you are resetting the transmission computer, clearing the limp condition.

Nov 05, 2009 | 1995 Volvo 850

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