everything working fine accept the meter"speed gauge" well last month it was like jumping around 0 jump to 300 donw to 30 and back up and down keeps going....... then until last week the whole thing was stopped, i've been changed the whole cluster but still the same, yesterday i changed the whole engine wiring harness but yea .....same happen..... should i change the speed sensor next?? what should i do? anyone got this bad happen b4?