speedometer not working right
 

Problem started a long time ago was driving to work and it just went foul it will jump around and work descent up to about 30 but won't go over that. I replaced the speed sensor on the pumpkin because it was chipped and nothing changed I can't find any obvious wiring issues so I weng ahead and got a good used instrument cluster and nothing has changed with that either so now that I feel quite dumb for wasting money I need some more advice. Also fyi the brake light is on but has been on forever and the abs light is on. Every other gauge works just fine.

Pull the differential cover off and check the tone ring. If there is metal or the teeth are chipped on it it will not read correctly. Also be a good time to check the ring gear and pinion for wear.

Ok ill give that a shot tomoro I need to change my fluid anyway

There is a speed sensor on the back of the transmission also that could cause the speedo not to work.

Didn't know about that one guess ill look at it

I checked the tone ring made sure it was clean and the sensor was clean no problems there couldn't find the sensor on the tranny never heard of it or seen it I'm just kinda lost any more ideas welcome thanks

I just realized you have a 5 speed. I believe the speed sensor is only on autos.

Any ideas it only goes up to about30 guessing wiring but its so weird it still kinda works

id check some speedometers have a adjustment panel on the back of it if its all electrical then id check there make sure you don't have that one. i had one and its able to adjust to tire size ect so maby that got jostled or wore out.

no adjustment that I could see there I swapped speedometers and it still does the same thing