Question about 1992 Oldsmobile 88

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Will the crank sensor keep the car transmission to not engage? For example i take off and get up to 55 mph and let off the gas and the speedometer go to zero. engine rpms goes up but the car acts like the transmission is out of fluid. Well it has fluid and fresh. I pull over and put in park, then into gear and takes off and it repeats.

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  • Expert
  • 63 Answers

Its not your crank sensor the problem is more then likely in your tranny your tranny needs some attention

Posted on Nov 01, 2017

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6ya6ya
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SOURCE:

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Posted on Jan 02, 2017

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emissionwiz
  • 85206 Answers

SOURCE: LeSabre 2005 speedometer whacked out

This is an electronic speedometer, nothing is user repairable, the circuit board fails and you get your problem, you will have to pull the speedo and send it out to an authorized GM repair station, they are all over the country, one company that does this is called SPEEDOTACH, LOOK THEM UP ON THE INTERNET.

Posted on Oct 17, 2008

Benimur
  • 6966 Answers

SOURCE: 1998 Olds Silhouette Auto Trans & Speedometer Problem

Hi and welcome to FixYa,

Initially, check the wiring/connectors to the speed sensor. The speed sensor is at the transmission would look like the image below.
f19e2c8.jpg
Incidentally, the speed sensor not only sends signal to the speedometer, is signals are also used by the engine computer and the transmission control. This would partly explain all the other concerns.

Check and perform preliminary visual or necessary inspection. Pls post back result(s). Good luck and Thank you for using FixYa.

Posted on Jan 18, 2009

GM Elec
  • 1000 Answers

SOURCE: 1996 Olds ciera, V6, Engine dies when put in drive

Try disconnecting the electrical connector at the transmission and see if it stall when you put it in gear. You will get a service engine light, but not to worry, it will go back out once you reconnect.
By disconnecting the wire connector we can tell if it is transmission related.
Good luck, let me know.
Regards,

Posted on Mar 08, 2009

  • 1 Answer

SOURCE: my 1996 chrysler cirrus rpm drop to zero on the freeway

Hey, The problem is NOT a crankshaft sensor or a TPS sensor.  It is most likely the distributor.  If it is not givin you a check engine light or shooting a code then its is your distributor.  This just happened to my 2000.. how many miles you got on it, you like it?  I got it 2 weeks ago, then on the highway it seemed to lose the response from the accel.  But it would sometime drop back into gear and I could drive for another 20 second and then it was dead.  So let me know if this helps....

Posted on Mar 26, 2009

Molson02536
  • 3854 Answers

SOURCE: around 1500 rpms or 55 mph engine seems to bog down

It sounds like your low on fluid, or your transmission filter is dirty and the front pump is not getting enough oil supply. Worst is your front pump is going bad. 
Check the fluid level and see if it's burnt. Good luck

Posted on Apr 07, 2009

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Loss of engine power/transmission 2001 chevy tahoe over 65 mph


Sound's as though a previous owner installed a speed governor so that the engine would not exceed the nationwide 55-65 mph speed limit average. This most likely was a company owned vehicle or owned by someone concerned about speeding ticket's or excessive speed by a teenage driver. It can be uninstalled by an experienced mechanic. Unless this poses a problem while driving on an interstate, you may wish to leave it as is.

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You don't give me much information to work with. However, 1st, look at the engine mounts. You may have a broken mount. This will make it feel like the transmission is shifting hard. Other than that, there is only a few things that will cause this. The speed sensor tells the computer when to shift the shift solenoids. It may not be "seeing" a quality signal. If this is the case, the speedometer will be bouncing too. Last idea is that it is skipping a gear. Starts in 1st, should go to 2nd at about 10 MPH. 3rd at 25 to 30 MPH. And, if you have a Overdrive transmission, it should go into overdrive at around 45 to 55 MPH. If it is skipping 2nd, it will engage 3rd at a high engine speed, and will feel like a sudden slam into gear. If this is true, your transmission needs some work. Hope this all helps. Good Luck.

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Got a 2003 ford tauras ..would the crank sensor keep the transmisson from engaging


no the crank sensor has nothing to do with your transmission. and all the crank sensor does is control spark up to around 4 or 5 hundred rpms (while your trying to start the car) after your car starts the crank sensor does nothing. the ecm takes over ignition controls once the engine is running. if you took it to a parts store to get it scanned beware the typical know it alls at the parts stores, most of them will do no more than get you to throw parts at your car rather than actually diagnose it. leave diagnosing to a professional mechanic. parts store guys are not trained mechanics. on the transmission issue what do you mean it will not engage? does it go into gear but not drive? is the gearshift stuck? does it go into gear but then stall the motor?

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Speedometer not working properly example traveling at 50 mph on speedometer had not accelerated or decelerated and suddenly speedometer showing 90


passenger side of vehicle, the tail shaft of the transmission has a VSS (Vehicle Speed Sensor)
that is most likely the culprit, it has a 2 pin plug and a 10MM bolt holding it in.

Sep 17, 2011 | 2002 Buick LeSabre

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Nissan Maxima speedometer reads 20 mph but actual speed is 40-50 mph, is my transmission going bad?


NO, IT'S NOT THE TRANSMISSION! SOUNDS LIKE A SPEEDOMETER PROBLEM! THAT WOULD BE ONE OF THREE THINGS! EITHER THE SPEEDOMETER, THE CABLE, OR THE SPEED SENSOR! THE SPEED SENSOR WILL USUALLY GIVE YOU A P0500 CODE ON AN OBD-II CODE READER! THE SPEED SENSOR IS ELECTRONIC SPEED CONTROL LOCATED ON THE TRANSMISSION! SOME HAVE A SPEEDOMETER CABLE HOOKED TO THEM, AND SOME JUST HAVE A 2 WIRE PLUG THAT HOOKS TO IT!

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1990 Honda Accord. Speedoometer is WAAAY off--going 15 mph the speedometer barely moves, yet 55 mph shows up as 80 mph. But the odometer reads correctly--even at "80"mph I can guage the speed off...


The speed sensor is malfunctioning on the transmission.I would not fix it as a result of the age of the car.Simply use a GPS for a more accurate speed

Jan 17, 2018 | Honda Accord Cars & Trucks

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30 mph and step on gas it shoots up to 50 mph on speedomenter is it the transmission?


not Transmission it is speedometer they are electris and when they mess up or burn a resistance inside that is the effect it has buy a used one in a junkyard replace the old and keep motoring

Apr 03, 2010 | 1996 Pontiac Grand Am

1 Answer

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The speedometer cable needs lubricating. It can be removed from the bottom where it connects to transmission, coated with graphite and reinstalled.

Apr 28, 2009 | 1991 Chevrolet Lumina

1 Answer

I have a 1991 buick park ave ultra


your car is suffering from a faulty speed sensor. it works by using a signal generator in the transmission that creates an electrical signal in relationship to vehicle speed. This information is processed by the vehicle’s computer for engine and transmission management and provides the signal for the body computer that controls the speedometer. If the speed sensor itself fails then this might be the reason behind your problems. in addition, another cause of this may be that harness my be loose connecting to the transmission or behind the speedometer. there are multiple pins connecting behind the speedometer, and sometimes when one of those pins are not properly connected it gives a problem like yours.

Sep 15, 2008 | 1991 Buick Park Avenue

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