[nettersc39]

Hey guys;

Question for you;

Was headed home this afternoon, when my 99 Sable acted up a bit. It shifted weird, the speedomter went to 0, and the rpms shot up to over 5000 rpms. I backed out of the throttle, and went to accelerate again. The speedometer came back up, and the rpms went back to "normal" between 1500-2000 rpms. Know I put a lot of miles on it recently, between work & home, and today as well. It has been quite warm up here as well. Could this be an indication that the tranny is going, or simply a tranny flush/gasket change (in which I dont think this particular car has ever had done to it)? If gasket change/etx, about how many quarts of tranny fluid will I need? It did run just fine after this happened. Any help/ideas would be greatly appreciated.

 

[bull geek]

Do you have the Duratec DOHC engine or the OHV Vulcan? This sounds like a Vehicle Speed Sensor issue if it's a DOHC engine in your Sable.

 

[Jeff K]

Tranny is fine. Either the VSS is failing or there is an intermittant in the VSS circuit (corroded VCC connector, etc.). Most likely VSS is failing.

 

[egiroux]

You should also change the fluid and filter when you change the VSS. Adding an auxiliary cooler is also a good idea.

 

[nettersc39]

No, it isnt the DOHC (my dad's Taurus is the DOHC). It has the OHV. Where is the vss located at? And how hard is it to change?

 

[egiroux]

Here's a picture of the VSS on my 2000 AX4S when it was being rebuilt:

 

[danhasenauer]

No, it isnt the DOHC (my dad's Taurus is the DOHC). It has the OHV. Where is the vss located at? And how hard is it to change?

I had the same problem with my RoseMist Vulcan with the AX4N. It's a PITA to get out. I couldn't get mine to come out and was afraid of breaking it in half, so I had a local tranny shop do it for me.