JaysXJ
NAXJA Forum User
- Location
- Louisville, KY
I have a 87' XJ 2-door, 4.0L Renix, auto tranny. My speedometer needle jumps back and forth while I'm driving. Why? Is it an easy fix?
-
Welcome to the new NAXJA Forum! If your password does not work, please use "Forgot your password?" link on the log-in page. Please feel free to reach out to [email protected] if we can provide any assistance.
.:Speedometer needle jumps back and forth:.
- Thread starter JaysXJ
- Start date
Matthew Currie
NAXJA Member #760
- Location
- Vermont, land of big clay
The usual reason for a jumpy speedo is a bad or badly lubed speedometer cable, so I'd consider a new cable. You might try getting some lube down it first, but don't be surprised if it's too late for that.
8Mud
NAXJA Forum User
- Location
- Central Germany
Many times it´s the cable. Take a look, beginning at the firewall and following it bak to the transfer. Try not to have any sharp bends in the cable or unessary kinks, it works best the straighter the run. Cable doesn´t have much extra length in most XJ´s I´ve seen.
The inside of the speedo cable, is like a long spring, it can be removed and greased with graphit grease, usually helps smooth out the action some. The spring/cable is four sided on the end and sometimes after removal is hard to get the spring/cable to go back into the receptical, at the speed sensor near the gauge cluster.
Taking the dash apart and seperating the speed sensor from the speedo cable end is a pain. Not something I´d want to do, unless really necessary.
Most times the problem spot in the cable, is right at the firewall in the engine bay, cable is bent a bit too sharply, right at the transfer and where it is clipped to the frame, near the transfer linkage.
The inside of the speedo cable, is like a long spring, it can be removed and greased with graphit grease, usually helps smooth out the action some. The spring/cable is four sided on the end and sometimes after removal is hard to get the spring/cable to go back into the receptical, at the speed sensor near the gauge cluster.
Taking the dash apart and seperating the speed sensor from the speedo cable end is a pain. Not something I´d want to do, unless really necessary.
Most times the problem spot in the cable, is right at the firewall in the engine bay, cable is bent a bit too sharply, right at the transfer and where it is clipped to the frame, near the transfer linkage.
jneary
NAXJA Forum User
- Location
- springfield, virginia
if you have cruie control, sometimes the cables come loose at the speed sensor for the cruise, located above the accellerator pedal, or just comes loose from the speedo head. i believe it just snaps onto the back of the speedo head.
