Speedo bounce
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Senior User
Joined: Jul 2010
Posts: 170
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From: Western SD
Speedo bounce
I am getting a very small bounce in my speedometer at 60 on up, enough that you can feel a slight change in vehicle speed. I changed the VSS but it got a little worse. It also threw a VSS code. Put in the old VSS back in and it worked as it did before replacing it. Speedo also reads 3 mph high at 65 and increases as speed goes up.
Any ideas what my else may cause this?
Any ideas what my else may cause this?
Lead Driver
Joined: Oct 2003
Posts: 8,476
Likes: 37
From: Madison, WI
If it's still fluctuating, check the tone ring in the diff. Crud between the notches will do that. If your diff fluid is old and ooky, this can happen.
Speedometer error is most likely a function of tire size. What size are you running?
Speedometer error is most likely a function of tire size. What size are you running?
Thread Starter
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Senior User
Joined: Jul 2010
Posts: 170
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From: Western SD
I am running size listed on the door sticker. I have also calculated the circumference and changed the setting with no luck.
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