How do I correct my speedometer?
How do I correct my speedometer?
Press and hold the calibration button located on the speedometer, start the vehicle, and then release the button. Press that button again and then take the test drive. Once you have driven the distance needed, press the button once more and the speedometer will calibrate itself to accommodate the new tire size.
Do I need to calibrate my speedometer?
Installing bigger tires improves acceleration, handling and makes your vehicle look good, but it is essential to recalibrate your speedometer to get correct vehicle speed readings.
What should I do if my speedometer is wrong?
Sometimes, it might require a little more work. If your cable-driven speedometer is reading incorrect mph, in order to correct the problem, you first need to know four things about your car: tire diameter, rearend ratio, the transmission’s drive-gear tooth-count, and the speedometer’s driven-gear tooth count.
Where does the speedometer go in the transmission?
There are two gears in the transmission that make the speedometer work. The speedometer cable gear (driven gear) is mounted within a sleeve/housing that goes into the side of the transmission’s tailshaft housing. This is where the speedometer cable attaches to the transmission.
How to calculate the gear ratio on a speedometer?
Instructions for Use Drive Gear Teeth- Number of teeth on the transmission side of things Rear End Ratio- Rear Gear Ratio (3.89, 3.08, 4.11, etc.) Tire Height- In Inches, Use The Gear Calculatoror Tire Size Calculator Speedo Revs/Mile- Number of RPM the speedometer needs to turn at 60mph
Can a tire calibrator be used with a speedometer?
You can use this to correct speedometers and odometers in conjunction with tires up to 54 inches with this calibrator. Use it with your non-stock rear gear ratios as well to ensure accurate readings. If you want to avoid taking your car to the shop for calibration, this is the ideal solution.
What’s the best way to change the speedometer?
Remove the plate to expose the two gears: the drive gear mounted inside of the transmission and the driven gear attached to the speedometer cable. Count the number of teeth on the drive gear and note the number. Measure from the top of one of the vehicle’s wheels to the center of the wheel.
How many gears do you need for a speedometer?
Your speedometer may or may not show a number. Most speedometer from 1965 on use 1000. Twelve speedometer driven gears are available for the 700R4 / 4L60 transmissions to calibrate the speedometer with various axle ratios and tire diameters. The number on the driven gear housing must match the number of teeth on the driven gear.
Is it possible to make your Speedo and odometer inaccurate?
You just made your speedo and odometer inaccurate. Here’s how to fix them both. If you’ve ever modified a car with smaller or larger tires or, perhaps, a different final-drive gear, you’ve immediately screwed up your speedometer. This is, of course, annoying, but for modern cars with a digital speed sensor, there’s a relatively easy way to fix it.
Where are the teeth on a speedometer located?
The driven gear’s teeth contact another gear (drive gear) that is attached to the transmission’s output shaft. By disconnecting the speedometer cable from the transmission and removing the retaining clip, you can remove the driven gear and the sleeve to count the gear teeth.
