My speedometer has began giving higher than actual speeds. If I slow down it will decrease the reading,but still will be too high. Does anyone know what the cause is and is it repairable?
1996 U-320 40ft.
83.000 mi.
Same problem. 74 on gauge is really 70
Speed on gauge has to do with tire size and gear in transmission.
From time to time i want to compare miles driven to mile markers to see how or if off there but have never done.
Mileage display comes and goes when it wants to
See if this helps
It will help if it's a digital (as in tripmeter) speedometer if not you're probably looking at a new speedometer. No parts for the old analog ones. You can buy a new one and program it yourself.
see ya
ken
Ken I went to Lauderdale speedometer in Florida. I sent my old there and they could not repair. They sent a new one set my odometer and calibrated it. . I plugged it in and it works great. Prior mine was doing what your did and then it quit. Good luck
After several calls to VDO dealers I have not found anyone that will repair mine, so it looks like I will have to buy a new one, but I sure hate to give up the trip odometer.
VDO can recommend dealers who can set your new speedometer to show you mileage on the old one.
Lauderdale speedometer 1-954-532-4880, if it is repairable the will fix it,if not they can sell you a new and pull the codes from your old one.
After installing the Silverleaf, I noticed the discrepancy with the VDO and monitor. I found that the Silverleaf was the accurate one when checked against the highway metered mile markers. The bad news is that I was not getting the mpg that I had previously calculated. Since I use the monitor almost exclusively, there is no need to change out or calibrate my gauge.
I had pretty good luck with these guys:
Nichols speedometer and Instrument (http://nsifleet.com/contact.php)
My speedometer was recording OK (not great) but the odometer was dying (sometimes it showed mileage, other time nothing) and the tach was completely fried.
They pulled the existing data from the odometer and reprogrammed a new module, then provided a new tach and some decent hands-on help in re-calibrating it.
I suspect that if you pull your unit and get it to them before it's completely fried they can pull the calibration numbers and set up a new one with all your old info.
For some reason I think that the speedo reading higher than actual speed is SOP. Mine reads 74 at 70. Yet the speed from the ICU is correct. I have checked it against radar and satellite. I have a Toyota car and it's off in about the same range. I've checked numerous cars with radar and they their speedo seem to show higher than the actual speed. Police cars always came with certified speedometers from factory. The plain civilian cars were not. Maybe it's the manufacturer fudging so that it runs out of warranty quicker than it actually does......that's it, it's a conspiracy! I wonder how much the mileage is off from what the ICU reads and what's shown on the speedo on all the coaches out there. Mine was changed out when I bought it so I took a pic of the readout so I can keep up with my total mileage. They refused to change it and said it was illegal.....huh!
My speedometer has always matched my Road Relay(ICU) and GPS as precisely as I can read it. And I've had to change speedos three times over 200 K miles.
Speedometers are required to be within 7% that leaves a lot of leeway.