Bouncing speedometer
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Joined: Dec 2003
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From: Stuttgart, Ar
Bouncing speedometer
Coming home after a trip to Little Rock for the birth of a new, healthy, granddaughter, my speedometer started jumping up when I was running speeds between 30 and 40 mph and my ABS light would flash. No code for VSS but I did have a P0603, P0488 (always) and P0341 (not related I don't think). Truck starts and runs fine. Battery connections are clean (done recently), and it hasn't been long since I cleaned the VSS sensor when I changed the diff oil. It happens so fast that you can barely see the ABS light flash.
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My 05 would do that, the speedo had a mind of it's own every now and then. I knew I was only going 30-40, but the speedo would indicate 70+ for a few seconds, then fall off and quit, then jump back and show 50, then 20. Bounce, flutter and act all ADHD.
After a couple miles or shutting off and restarting the speedo was fine.
The odometer wasn't effected and I had no CEL or any other indication something was whack. At the time (late 2007?) the dealer informed me the cluster would be replaced per the TSB only if it occurred permanently and not erratically. Coincidentally not long after that it behaved itself.
Josh
After a couple miles or shutting off and restarting the speedo was fine.
The odometer wasn't effected and I had no CEL or any other indication something was whack. At the time (late 2007?) the dealer informed me the cluster would be replaced per the TSB only if it occurred permanently and not erratically. Coincidentally not long after that it behaved itself.
Josh
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From: Stuttgart, Ar
Mine jumped to 100 one time almost like the PCM did a reset but the ABS light is flickering every time it happens. I haven't driven it today because I'm replacing my fuel pump motor and doing some other stuff. I checked the connection at the diff for a leaking sensor but it looks dusty dry. I may just throw a VSS in it since it's so cheap just to see if it makes a difference.
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Here are the TSBs the effected my 2005...
06-7-4***STUCK OR JUMPING / BOUNCING / ERRATIC SPEEDOMETER AND/OR TACHOMETER
07-11-2*** STUCK OR JUMPING / BOUNCING / ERRATIC SPEEDOMETER AND/OR TACHOMETER
Josh
06-7-4***STUCK OR JUMPING / BOUNCING / ERRATIC SPEEDOMETER AND/OR TACHOMETER
07-11-2*** STUCK OR JUMPING / BOUNCING / ERRATIC SPEEDOMETER AND/OR TACHOMETER
Josh
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From: Stuttgart, Ar
I couldn't reproduce it this afternoon after I got done with my fuel pump (which is incredibly quiet now). I suspect it will rear it's ugly head when it gets cold again, so I should be good for a few more months.
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Joined: Oct 2010
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From: Ouray, CO
Try monitoring the sg2 for mph to see if it also shows the jumping speed.. that should help isolate to abs sensor or wire vs dashism.
Sent from my Sprint PC36100 using IB AutoGroup
Thread Starter
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Hotshot
Joined: Dec 2003
Posts: 15,369
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From: Stuttgart, Ar
Here are the TSBs the effected my 2005...
06-7-4***STUCK OR JUMPING / BOUNCING / ERRATIC SPEEDOMETER AND/OR TACHOMETER
07-11-2*** STUCK OR JUMPING / BOUNCING / ERRATIC SPEEDOMETER AND/OR TACHOMETER
Josh
06-7-4***STUCK OR JUMPING / BOUNCING / ERRATIC SPEEDOMETER AND/OR TACHOMETER
07-11-2*** STUCK OR JUMPING / BOUNCING / ERRATIC SPEEDOMETER AND/OR TACHOMETER
Josh
I did check the alternator and all battery connections as I had them loose a couple of weeks ago, but they're clean and tight.
