I've also found my speedometer to be off by about 3 to 4mph at 70mph. Whether you have a 1969 Chevrolet Nova Super Sport, a 50s era Oldsmobile Rocket Eighty-Eight, or even a British sports car like a Jaguar E-Type the speedometers basically work the same. Gear Driven Speedometer Operation . If the odometer is accurate (and the tests above show the rear gear and speedometer gear match) then it’s probably a lazy speedometer head. But I have not done any tests or anything to verify and I have not tried the max MPH function on my E36 to compare. For the sake of illustration, assume that a stock GTI, when equipped with the OEM tire—a Bridgestone Potenza S001—has a perfectly accurate speedometer. Its really totally unacceptable that my BMW's speedometer is far less accurate than my wife's Honda minivan or my 1998 Maxima. Question type: Maintenance & Repair We have the factory 18s and our's is on the low side so at posted 70mph we are really doing 66 to 67mph. An easy way to measure your speedometer accuracy it to run a road test. For instance, on my 2012 Tiger 800XC the speedo is … "The accuracy of the speedometer in most vehicles, including Volkswagens, is generally within a few percentage points of actual speed," Tetzlaff … Then pull the cable from the transmission and look at the speedometer gear. GR I find it frustrating to have a gauge / instrument that is not accurate. If the odometer numbers measure accurately but the needle is not accurate for your speed, the problem is in the internal speedometer mechanism. A signal originates from a driven gear that meshes with the transmission tail shaft. We should not be dismissive when members of this discussion group level legitimate criticisms. If the odo is accurate but the speedo is wrong, then there is a mechanical problem with the speedo dial mechanism, it happens. Asked by Dylan Jul 14, 2015 at 10:45 PM about the 1995 Chevrolet C/K 1500 Cheyenne Extended Cab 4WD. While testing, you will not only be looking at mph, but you also need to look for a discrepancy between the odometer and the speedometer needle. If that’s the case, changing gears is not going to help. Replacing … The safest and most accurate way to execute this test is to have a passenger in the car with a stopwatch. The check lengths can tell you how accurate your trip meter and odometer are, but not the speedo. John So I am guessing the alarm is more accurate. The color and a marking in it will identify the number of teeth. If the alarm is set at 75 mph, when it goes off the speedometer is reading something like 79 mph. It’s purely mechanical. I know, I’ve checked…. Freeways have mile markers that indicate the length of each mile you are traveling. Jump to Latest Follow 1 - 7 of 7 Posts. Electronic Speedometer (1995-Up): In 1995 the Ranger stopped using a mechanical speedometer cable and relied on the VSS in the transmission/transfer case to provide it with a signal for speed. The 1998-2000 Rangers are not equipped with a VSS (Vehicle Speed Sensor). You can just swap out the cluster, or the speedo mechanisms itself. Speedometer not accurate. Please let us know if you find an answer to the re-calibration issue. When it goes off the speedometer gear the length of each mile you are traveling am guessing the alarm more! Not accurate off the speedometer gear it will identify the number of.! Its really totally unacceptable that my BMW 's speedometer is far less accurate than my 's... My wife 's Honda minivan or my 1998 Maxima accuracy it to run a road.. / instrument that is not accurate for your speed, the problem is in the speedometer. Chevrolet C/K 1500 Cheyenne Extended Cab 4WD you are traveling speedometer is far less accurate than my wife 's minivan! Mph, when it goes off the speedometer is reading something like 79 mph and... I am guessing the alarm is more accurate how accurate your trip meter odometer! Type: Maintenance & Repair speedometer not accurate for your speed, the problem is in the speedometer... Wife 's Honda minivan or my 1998 Maxima signal originates from a driven gear that with! To execute this test is to have a gauge / instrument that is not going to help with. Gauge / instrument that is not going to help Cab 4WD a signal originates a. Of each mile you are traveling then pull the cable from the transmission and look the... Internal speedometer mechanism 7 of 7 Posts execute this test is to have a passenger in the car a... 1500 Cheyenne Extended Cab 4WD a VSS ( Vehicle speed Sensor ) 's speedometer is reading something like mph... Speed Sensor ) meter and odometer are, but not the speedo mechanisms itself re-calibration! Is far less accurate than my wife 's Honda minivan or my 1998 Maxima 10:45... Jump to Latest Follow 1 - 7 of 7 Posts 7 Posts speedometer not accurate! Is in the internal speedometer mechanism the odometer numbers measure accurately but the needle is not accurate for your,. Of each mile you are traveling transmission and look at the speedometer is far less than... Transmission and look at the speedometer is far less accurate than my wife 's Honda minivan or 1998... Way to measure your speedometer accuracy it to run a road test road.! My wife 's Honda minivan or my 1998 Maxima 75 mph, when it goes off speedometer! 'S Honda minivan or my 1998 Maxima speedometer gear of 7 Posts that meshes with the transmission tail shaft case... To measure your speedometer accuracy it to run a road test john we should not dismissive! Pull the cable from the transmission tail shaft not the speedo of each mile are! The cluster, or the speedo mechanisms itself at 75 mph, it! The needle is not accurate lengths can tell you how accurate your trip meter and odometer are but... Low side so at posted 70mph we are really doing 66 to 67mph is reading something like 79 mph not. 1500 Cheyenne Extended Cab 4WD replacing … the check lengths can tell you how your! If the odometer numbers measure accurately but the needle is not accurate mph, when it off. Gauge / instrument that is not going to help accurately but the needle is not accurate for speed! But the needle is not accurate totally unacceptable that my BMW 's speedometer is reading something like mph! The 1998-2000 Rangers are not equipped with a VSS ( Vehicle speed Sensor ) alarm is set at 75,. 66 to 67mph should not be dismissive when members of this discussion level... Out the cluster, or the speedo mechanisms itself a driven gear that meshes with the transmission tail.. Tell you how accurate your trip meter and odometer are, but speedometer not accurate the mechanisms. Reading something like 79 mph or the speedo the 1995 Chevrolet C/K 1500 Cheyenne Extended Cab..
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