Speedo quit working-- trans

Check to make sure your shift cable is connected at both ends(console and trans).

On the 1995 Jimmy, the shift cable can come loose on the mount on the side of the transmission where the cable meets the trans. When it slips, the alignment goes off and causes the driver to not be able to put the trans into park. If you take a long stick you can push the shift arm on the trans to the park position and your trans will go into park.....what you (and I) really need to know is how to take the shift cable mount apart and reset it.

They have nothing in common , but if the speedo is not working the trans will not shift , you need to check the speed sencor located on the trans.

depending on the model and year there are so many sensors and solenoids on the trans and engine that it is going to be hard to fix without a scan tool.......but if this started at the same time the odometer and the speedo quit working i would be looking at the speed sensor in the trans and then the speed sensor that is made in the speedo head that both can make the speedo head and the odometer not work......i hope that this info will help you and if ican be of any other help let me know.......let me and fixya know if this was any help to you and a thumbs up would be appreciated.....good luck and have a blessed day............

Before you go crazy, try posting your question in Google re replacing the module/sensor.

Ck your fluid level in the trans and shift through all the gears manually. You may want to replace the trans vacuum. modulator. It's inexpensive and easy to replace. Good Luck.

Sounds like something internal in the trans. It will be an electrical issue, not mechanical. Only way to tell is to hook it to a machine.

YES / VSS ON TRANS GIVES TRANS CONTROLLER SIGNAL TO SHIFT.ABS RUNS SPEEDO

Your Trans should be the 4L60. If your speedometer quits working and the truck won't shift out of 1st gear, the "Speed Sensor" is probably bad or the wiring is bad where it plugs into the sensor. The sensor will be towards the back of the trans or on the tail shaft. An easy way to test if the wiring is bad at the plug is to pull on the wire 3" or 4" from the plug and watch closely to see if it stretches. If there is any stretch the wire inside the plastic sheath is broken.