Ford Super Duty (1999-2016) :: Speedometer Is Accurate To Within 1 Mph Or So
Jan 29, 2015
I've got a 99 F-250 7.3 with the 6 speed manual. My speedometer is accurate to within 1 mph or so. However when compared to a GPS unit, my odometer is off by about 50%...meaning it registers approximately 1 mile for every 2 traveled.
I was under the impression the mechanism that results in the speed being displayed is the same one driving the odometer and therefore if one was off, the other would be (conversely, if the speedo is accurate, so would be the ODO). How do I resolve this issue?
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just got 20" rims 295/65/20 Nittos. Is my odometer accurate and speedometer?
Not that it matters but its a 99 F350 CC LB 3.73 axle ratio
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The 19.5" wheels are not an option on the 2013 F-450, unless you order a Chassis Cab. I'm certain many have made this change. My question is can the dealership make the necessary changes so the speedometer correctly measures the vehicle speed?
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I just bought a 99 f250 sd 5.4. The speedometer doesn't start working until it reaches about 30 mph. The transmission doesn't shift correctly until the speedometer starts working. I cleaned the speed sensor on the rear end but that didn't work. I don't see any sensors or switches on the tranny other than the neutral safety switch. What it is?
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On my '99 F250 PSD 4x4 the speedometer climbs very smoothly (normal) until I hit 54mph and then it just stops going up. Reviewing other posts I have changed the DSS (differential speed/ABS sensor) and the VSS (tranny speed sensor). Disconnected both batteries for several hours to see if it would clear.
Doesn't bounce, peg, go to 0, just won't go past 54mph. No power loss. Tach continues to climb and speed continues to increase. No strange symptoms except this 54mph thing. It is completely repeatable. All fuses under the dash and hood check out ok.
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I bought a 1999 Superduty 7.3 6 speed and went out to drive it yesterday and noticed my speedometer stops working at 40mph. I saw many posts about this but no fixes. Bad cluster or vss? No abs light on dash. Still runs and shifts good. Only one yellow airbag light illuminated on dash...
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For a 99 F250 7.3 with 6 speed manual..my odometer goes around but the speedometer does not work at any speed. A mechanic said he thinks the problem is in the gauge cluster but I would like to know where to start troubleshooting.
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my speedo doesn't work but, all the other gages do. I just replaced the front hubs, abs sensors, ball joints etc... I put a new sensor in the rear end this morning and still nothing isthere a fuse tied to this somewhere? am I missing something? it's a 5.4l with a 4r100
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1999 superduty 7.3 standard ... As I said speedometer fail with abs lite on. When ambient ten above 85F, speedo works abs lite out and cruse control works.
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I have searched everywhere, but I can't find the information I need for anything newer than 2007. I have the instrument cluster removed, and I can't figure out how to get to the bulb. In previous years, it just twisted out, but this one is different.
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1999 f-250 7.3 diesel. Speedometer doesn't work and neither does the odometer, the ABS light stays on and once you start driving the OD light starts flashing and the truck starts shifting weird. I've changed the rear ABS/VSS sensor on the diff and the OSS on top of the transmission at the tail end. Still no luck.....
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Buddy has '96 Dump Truck. I think it is an F650 but there a no markings. It is small as dump trucks go, but has air brakes and an automatic transmission.
The speedometer goes back and forth full scale as if a speedometer cable were bad. Problem with that is, my buddy says it has an electronic speedometer.
About the only thing I can think of that would cause that problem is the Vehicle Speed Sensor.
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Occasionally while driving my 2005 F250 the speedometer will quit working & the abs light will come on. The transmission will also start to shift weird. If I pull over, shut the truck off & restart it everything is fine again. I can go weeks at a time before it happens again, but yesterday it happened twice. The transmission doesn't seem to shift real fast, but I think that is a separate issue. My first instinct is that the rear VSS is starting to go out, but I am not sure if these symptoms are common.
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2001 F250 SD, V10, Auto, 155K miles
While driving home from work I noticed the needle jump from around 55 to 70 on the display, then settle back in at 55 ish. First I just caught it out of the corner of my eye, but watched more closely, and it did it again as I drove. The tow/haul override button on the shifter was blinking also, (as if it was "Mad" about something)..
Then I noticed that the jump of the Speedometer needle was linked to when I changed from High to Low on the headlights, and vise-versaI was NOT in cruise mode The voltmeter did not EVER waver. (I thought that the increased current might be causing a temporary problem of sorts). Where to start looking?
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Got a weird one today. Everything was fine all day. Got the old girl smogged this afternoon and made one more quick stop. Got back on the freeway and up to speed and looked down. Speedo said I was 90? Yeah right. I was going with the flow.
So I plugged in my bluetooth ALDL dongle and fired up OBD Link. Well, OBD Link showed normal and accurate speeds. As did a second app on my phone for giving speed. So my VSS must be working correctly.
So my speedo is showing about 25 over actual. When the ignition if off the needle sits between 20 and 25. so did my speedo take a dump? Is there anything else I might try to see if it auto-calibrates?
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I have a 2002 F350 v10. I have 101,000 miles on it. When the Speedometer hit 15mph it starts to climb Rapidly to a 100mph then it stops and goes to 0. My miles go blank and when I slow down to around 5mph it comes back. I do know that I have a bad clock-spring and am changing that this weekend.
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I'm installing an aftermarket radio in my 2004 SD. The illumination control stopped working (when I turn on the lights, the radio doesn't get darker), and now the dash and a/c panel aren't backlit any more.
This is the first time I've driven it since the new radio. I thought I might have seen a spark when testing to see which wire was the illumination control, but I'm not sure. I've got a fuse box diagram, but so far all the fuses look good.
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2005 6.0 F350 dually, speedometer quit working and the ABS light came on. I replaced the speedo sensor in the diff, but to no avail. Hear a lot about the cluster, however nothing with the ABS light on.
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I'm having an issue on my 2002 F350 7.3. Today I hop in it and drive off I notice my speedometer stopped working. My overdrive light on the shifter started flashing. The trans seems like its not shifting correctly. It will eventually shift into overdrive but not always. Also now when I start off my fuel gauge raises and when I come to a stop it drops all the way to E and causes the ding and fuel light to light up. I figured this was all due to the VSS being bad. So I drove over to Autozone bought another VSS and a cheap tool set and changed it in the parking lot. No dice. I do have a scanner to pull the trans code but its late and I just got home.
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I have a 1999 f250 7.3 ... l extended cab 4x4 super duty ... ABS light on, over drive light flashing and speedometer has stopped working .. I have replaced abs senor on the rear of transmission and on the rear end.both new and just replaced abs module just the computer not the pump that was used . And abs light, overdrive light are still on and the speedometer is still not working ..
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2001 PSD ... Had speedometer jump 20 km's (12mph) while stopped with foot on the brake? This has been happening on my 2001 PSD intermittently for the last couple months.
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