speedo problem

[hummer_maxxer]

hey guys, picked up and early 99 a couple days ago and on the ride home i noticed that the speedo only works when im doing over 60 km/h. and between 60 and 40 it bounces around sometimes?? any ideas whats causing this??? do i just need a new speedo cable or a new sensor??

[ms8091]

It is probably the Vehicle Speed Sensor in the rear axle housing. It is mounted in the center / top of the housing with 2 wires going to it. Takes 5 min. to replace. To be sure if it bad, run the codes on it, the should be one for the VSS.

[hummer_maxxer]

dont got a code reader, how much is the sensor worth ??

[Zaairman]

It isn't an expensive part, but try cleaning it first. Fixed mine.

[ms8091]

Originally Posted by hummer_maxxer

dont got a code reader, how much is the sensor worth ??

I think mine was $15-20.

[merc123]

Mine just started doing this. Was reading 70 then dropped down to 60 then back up to 70. No check engine light showing so I wouldn't think it had codes in it.

[ridiculously_necessary]

just repalced mine, Ford $26

[mick883]

Easy to replace. If is isn't the sensor, it will go soon enough if you are doing any kind of driving that isn't on a perfect smooth road (I haven't found such a road in America yet).
JMTC