99 Sebring Convertible Speedometer Problem

[FastPtch]

While driving noticed speedo not registering. Soon after car died and coasted off the roadway. Restarted ok, but does not shift to 4th or overdrive. Does this sound like a failure in the TCM or possibly the relay?? Has anyone had a similar experience?? Car has 102,000+ miles

 

["Richard Ehrenberg" rehrenbergnospam]

Possible bad output speed sensor.

"FastPtch" wrote:

While driving noticed speedo not registering. Soon after car died and coasted off the roadway. Restarted ok, but does not shift to 4th or overdrive. Does this sound like a failure in the TCM or possibly the relay?? Has anyone had a similar experience?? Car has 102,000+ miles

 

[Mark Stuart]

I had a similar problem with my 1889 Shadow, except for the motor turning off. The culprit was a bad output sensor. When the speedometer doesn't work, the TCM doesn't know what the speed is and therefore, the electronic overdrive won't engage.

Mark

FastPtch wrote:

While driving noticed speedo not registering. Soon after car died and coasted off the roadway. Restarted ok, but does not shift to 4th or overdrive. Does this sound like a failure in the TCM or possibly the relay?? Has anyone had a similar experience?? Car has 102,000+ miles