"The accuracy of the speedometer in most vehicles, including Volkswagens, is generally within a few percentage points of actual speed," Tetzlaff … I find it frustrating to have a gauge / instrument that is not accurate. Replacing … If the odo is accurate but the speedo is wrong, then there is a mechanical problem with the speedo dial mechanism, it happens. John The 1998-2000 Rangers are not equipped with a VSS (Vehicle Speed Sensor). Please let us know if you find an answer to the re-calibration issue. 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. Freeways have mile markers that indicate the length of each mile you are traveling. Question type: Maintenance & Repair You can just swap out the cluster, or the speedo mechanisms itself. The color and a marking in it will identify the number of teeth. I know, I’ve checked…. The safest and most accurate way to execute this test is to have a passenger in the car with a stopwatch. 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. If the alarm is set at 75 mph, when it goes off the speedometer is reading something like 79 mph. Asked by Dylan Jul 14, 2015 at 10:45 PM about the 1995 Chevrolet C/K 1500 Cheyenne Extended Cab 4WD. I've also found my speedometer to be off by about 3 to 4mph at 70mph. 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. If that’s the case, changing gears is not going to help. We should not be dismissive when members of this discussion group level legitimate criticisms. Jump to Latest Follow 1 - 7 of 7 Posts. If the odometer numbers measure accurately but the needle is not accurate for your speed, the problem is in the internal speedometer mechanism. Its really totally unacceptable that my BMW's speedometer is far less accurate than my wife's Honda minivan or my 1998 Maxima. 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. 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. Gear Driven Speedometer Operation . It’s purely mechanical. GR A signal originates from a driven gear that meshes with the transmission tail shaft. 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. 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