I am now on to my next little problem with my car. This problem is the next one on my list of things to fix, but her is my problem that I am talking about. The problem consist that the speedometer will bounce back and forth or stop working all together when the car hits 65 or 70MPH but if I tap my brake pedal or come to a stop it will start to work again until I hit the speed I mentioned above so to me I am guessing an electrical problem but not really for sure so I am turning to here to help me get another problem checked off my list of things I need to get done to me car. Also this problem only affects the speedometer, the other gauges work just fine.

a bad vss (vehicle speed sensor)or its wiring will make your trans and pcm act funny not shifting or shifting up when not supposed to. if it doesnt do anything else wrong its the pod or wire/connectors for that

if you have a scanner with live data you should be able to confirm this by watching the speed on hte scanner vs what the speedo is doing

I am not sure about the Achieva, but the H/C bodies use an electronic speedometer, instead of the old cable style. If it is all electronic, and the VSS is to blame, usually the odometer will stop advancing, cruise control will quit, etc.

Not even counting that the tranny would freak out in most cases because it doesn't know when to shift.

The cluster in driven threw the VSS not a cable. I also noticed that from time to time the transmission will kinda jerk when it shifts but I also know that I have a problem with the mounting bracket for the transmission mount so the transmission mount had to be rigged to to bracket on the side of the transmission. So I don't know it that would be causing the jerking I am getting or if it is a VSS problem. Also I am not really have any other problem with my performance, in fact after I replaced the timing chain in has increased my engine performance. Also my cruise control works just fine.

sounds like the cluster or cluster connector

Should I take it into an electrical to find out for sure or should I just go to a junk yard to get one? In your opinion what would be a smarter choice.

i would find a wire diagram and see which wire it is and check the connector for loose pins first.

Ok. I will do that when the snow blows over.