speedometer problem

[phreaksho]

So driving to school this morning I get on the freeway and I wasn’t going very fast and I looked down at my speedometer and it said 100mph the cars around me were passing me is this anything I can do myself I have access to a shop or am I going to have to take this one in?

 

[greenbeanmtx]

Id be interested to hear what others say cuz mine does this too. I dont have an chirping or skipping around at all. It just at speeds around 80 or so will decide to go visit 100 or so then come back at its on leasure. Mines an 89. What year is yours?

 

[phreaksho]

i have a 91 and i did just change my tranny fluid but i did a search and there was nothing because it doesnt jump or skip around or anything

 

[phreaksho]

driving home from school about 10 mins ago everything seemed to work normally now? im really confussed what happened i also remember last night coming home from work my red oil light came on about 5 times all while braking and it just blinked on...

 

[SHO#7]

That red oil light you need to worry about. The speedometer and the oil pressure are not related. If you car is over 100k and you are getting an oil pressure light, change your rod bearings. Do them now, before they do you.

As for the speedo, you can pull the cluster and try to **** the cable. My 93 had an itch noise and a slight vibration that was caused by a dry cable. If that does not work, it is in the speedometer head.

Serious. Check that oil pressure. You most likely need to change those bearings now.

Mike

 

[greenbeanmtx]

Wousers.......... yea for now just forget the speedo cable dude. If that oil light is flickering you need to fix it before something bad happens. If i remember right that light is triggered when oil pressure gets at or below 5 psi which is much too low. If it were me id get a real gauge on it instead of that dummy light and see what its running and change them regardless. Save her before she becomes another spun bearing death.

 

[NEUSHOER]

I have a 95' MTX and I have a problem with my speedometer. When im driving it goes up and down so I have to average me speed by how much it moves. When I give her **** then she will say Im going a buck 20 or so when I am probably only going around 90. Every once in a great while it will catch and actually show the correct speed. Do I need a new cluster or just to **** my lines.

 

[phreaksho]

yeah i thought that was rod bearings cuz i remeber seeing another thread on that so i did order the bearings even tho ive been looking for a 3.2 swap but that prolly wont be coming for awhile so ill save the sho before she goes but thanx for all the help and quick replies