Speedometer needle is trippin.

[mustangt562]

Hey fellas can ya help me out. This has been buggin me for about 2 months now. My speedometer needle from 0-50 wont read, its jumps around and bounces then after about 50mph it will start to read accurately. What the heck do you think could be the problem. It bugs cause I dont know when im speeding or not untill after 50mph and sometimes that is too late with the police behind you. HELP!!!!!

 

[The Green GT]

Do you have some aftermarket gauges? Like just the white faced gauge plates? Mine would rub on them and wouldnt read for a while, then it would just jump up.

 

[94GTCoupe]

my speedo reads backwards.while driving it rotatrs counter clockwise until it reaches 100mph.checked the vehicle speed sensor wires they were melted together.fixed that,but still same problem.i heard somewhere that it could be the small chip that plugs into the back of the gauge cluster.dont know what it is called,but found one at local junkyard will install it in the morning and see what happens....stay tuned!

 

[mootang]

pull the speed sensor and check the plastic gear on it. its probably missing some teeth.

 

[94GTCoupe]

pulled cluster and replaced chip in back.did not fix my speedo.seems to be some sort of memory for fuel gauge.before install fuel read 1/4 tank,after install,3/4 tank.pulled it and put my old chip back in.

 

[MI95Cobra]

the gauge cluster itself might be out....a few years back my wife's 94 mustang speedometer went out and changed the sensor on the transmission...after consulting a few people...i discovered that sense its all electrical there is something in the cluster....so you might want to consider that....