[Preston_USA1]

The speedo on my 77 RC is bouncing all over from 0-100 when I drive the truck, am I going to need anything special to fix that when I take it out to lookl at it?

Preston

 

[SuperBurban]

Your speedo cable likely needs lubed, don't delay to much. I once put it off because it was in the middle of winter, and on one of the bounces the needle broke.

 

[macario]

Could also be your speedo needs to be rebuilt but try lubing your cable at both ends with lithium grease and see if that calms things down. If not, before I look at rebuilding the speedo, I'd try a new cable if the one in there is the original one.

 

[AZ_Drummer]

Mine was doing the same thing. A new cable fixed it.
$20 from Bouchillon Performance.

 

[macario]

A reminder on the speedo cable if you opt to pull it off and lube it, don't forget to release the little plastic clip that holds it on the back of the speedo gauge. Also, NAPA sells the cable also. Have a part number if you want it.

 

[Chump]

FYI-If you have cruise control than you have 2 cables...one from the transfer case to the servo and one from the servo to the speedometer.

 

[EZRider]

Could also be your speedo needs to be rebuilt but try lubing your cable at both ends with lithium grease and see if that calms things down. If not, before I look at rebuilding the speedo, I'd try a new cable if the one in there is the original one.

I concur! Lithium, white that is. White lithium grease is the cure to what ails yer cable!!!!

EZ

 

[Preston_USA1]

Ok, I'd have to guess that its a cable lubing that's in order. Maybe I can get my girlfriend to help me do the job. Thanks for all the help guys.

Preston

 

[Major Ramifications]

You might try some spray lubricant into the back of the speedometer hole (where the cable goes in). That fixed the same problem in my old Demon. Before that, the speedo would make a horrible noise and the needle would go crazy, especially when it was cold outside. I guess something in there was galling due to lack of lubricant.

 

[Major Ramifications]

Ok, I'd have to guess that its a cable lubing that's in order. Maybe I can get my girlfriend to help me do the job. Thanks for all the help guys.

Preston

Let me know if your girlfriend is interested in lubing my cable, too!

 

[78machowgn4me]

just a helpful hint, take cable all the way out and hang vertical and let the grease soak in. if that doesn't cure the problem it might be the transfer case to speedometer adapter (looks like a little black box). mine gave out recently, and the symptoms were identical.