Speedometer Bobbing After 65

[TheDirtyJeep401]

Ok so ever since i bought my MJ it has done this, once i hit 65 mph, it starts to bobb up and down. Its like its trying to say you are somewhere in this general area of speed. Its not really a immediate fix, but just for when i get to it, (Someday)

[ComancheKid45]

Loose connection @ the speedometer or transfer case, or the beginnings of a fraying cable......those would be my guesses

[TheDirtyJeep401]

Ill have to check it out someday, nothin really big just wanted to know. Thanks

[64 Cheyenne]

Try rotating the sender on the TC, seen one do this if it wasn't oriented correctly.

[JFAComanche6]

My speedometer wobbles all the time, and I've had a 2wd and 4wd and it won't quit. it settles down sometimes and it doesn't really bother me that much, but if someone knows how to fix it it would be nice.

[Eagle]

Check the routing of the speedo cable. If there are any tight bends, try to move clips or something to change the bends to a larger radius. If you feel up to it, remove the instrument cluster and take the speedo cable off the speedo head. You should be able to pull the cable up from there to remove it from the outer sheath. (NOTE: Before doing this, inspect the entire length of the cable. If the outer sheath is frayed or broken, do NOT pull the inner core out or it may not go back.)

 

If you can get the inner core free, wipe it down with a rag wetted with mineral spirits to clean off old, dried lubricant, then lubricate it with fresh, clean lube. I think there are special lubes made for speedo cable, but white lithium would be a lot better than 20+ year old, dried-out whatever. Then push the cable back into the sheath, being sure it engages the drive gear socket, reattach to the speedo head, and replace the instrument cluster.