'79 Speedo Bounce
Thread Starter
Drifting
Joined: Feb 2005
Posts: 1,583
Likes: 5
From: Richardson Tx.
'79 Speedo Bounce
My speedo is a little inconsistent. Little wobbly til 20 mph. Nice and steady @ 30mph. And then it fluctuates back and forth about 5mph when I get over 50 mph. I replaced the speedo cable about 5 years ago - only 700 miles since - non cruise control car. These results are when I pulled the cable from the transmission and used a drill.
Does this sounds more like a speedo rebuild needed or a speedo cable/lube issue?
thanks
Does this sounds more like a speedo rebuild needed or a speedo cable/lube issue?
thanks
Melting Slicks
Joined: Aug 2001
Posts: 3,047
Likes: 124
From: Wichita KS
As already stated, lube first.
Just curious: if the car is an automatic, do you have an ATF leak where the speedometer cable enters the transmission?
If the transmission o-ring seal is bad, then ATF might be working its way up the speedometer cable.
Just curious: if the car is an automatic, do you have an ATF leak where the speedometer cable enters the transmission?
If the transmission o-ring seal is bad, then ATF might be working its way up the speedometer cable.
Burning Brakes
Joined: Jun 2006
Posts: 1,148
Likes: 5
From: South Dakota
I took a "little" wd-40 and sprayed it into the back of the speedo where the cable goes into. Drove it for a couple of hundred miles and it straightened it out. Be careful if you try this so you don't get to much in it and lube the face of the speedo.
Thread Starter
Drifting
Joined: Feb 2005
Posts: 1,583
Likes: 5
From: Richardson Tx.
I bought a new cable - lubed it with white lithium grease - took the speedo out of the car so there were no cable bends - connected my drill - SAME results 
I'm now looking for a good resource to rebuild a '79 speedo....
I'm now looking for a good resource to rebuild a '79 speedo....
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