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.

Marvin

• 85242 Answers
• Posted on Oct 17, 2008

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.

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.

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.

Bruce Bracey

• 1000 Answers
• Posted on Mar 08, 2009

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,

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....

Harvey N Tawatao

• 3854 Answers
• Posted on Apr 07, 2009

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