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Gentlemen: I took my M-38 out yesterday to drive in a local St. Patrick's Day parade. It was great to see the expressions on the veteran's faces as we drove by. It made the whole restoration worth it!!!

As I was driving to the parade, I noticed a grinding sound. At first I thought it was the transmission and my heart dropped! Then my son, who was sitting in the passenger seat said, the grinding sound was coming from the speedometer. I noticed that the speedometer needle was bouncing back and forth erratically and when I slowed down to under 25 mph the sound stopped! I did replaced the old cable with a new commerical #3A cable when I originally did the restoration. I wonder if the inside cable is slipping where it mates with the back of the speedometer or could if be inside the speedo itself? Any suggestions? Regards to all, Dennis.l

I had the same problem. However it was on an early CJ5, but I assume it would be the same issue. Remove the line from the back of the speedo and put a few drops of oil. I used marvel mystery oil. Works just fine now. Someone else will chime in I 'm sure.

Thanks for the info. I disconnected the speedometer cable from the transmission then connected an elecrtric drill to the inside cable. It made the same noise. Thank God it's not the tranny. I'll let you know how I make out. Thanks for the advice. Regards, Dennis.

i put gear oil in the cable before connecting it with the spoeedometer and already conected with the transfercase

gearoil stays longer in the cable than engineoil, after that no bouncing needle anymore, you can also put some oil at the back of the speedometer

i put gear oil in the cable before connecting it with the spoeedometer and already conected with the transfercase

gearoil stays longer in the cable than engineoil, after that no bouncing needle anymore, you can also put some oil at the back of the speedometer

Gentlemen: I did as you suggested and everything appears to be OK. No more bouncing speedometer needle! Thanks to all. Dennis

Glad it worked out for ya