How do I know what Speedo gear I need?
What gears should I get?
- Count the teeth on the speedometer drive gear.
- Find the gear ratio for the drive axle.
- Calculate tire revolutions per mile.
- Calculate the required tooth count for the driven gear.
- Get the Driven Gear (for your transmission) with the closest tooth count to your calculations.
How does speedometer gear work?
Inside a mechanical speedometer The magnet rotates with the shaft and its magnetic field attracts a metal drum to turn the speedometer needle against the force of a hair spring. The needle moves round the dial until the restraining force of the hair spring brings it to rest to give a reading of the road speed.
How do I slow down my speedometer?
“If you need to slow down the speedometer, you need more teeth on the driven gear.” For example, if your speedometer is showing 60 mph and it should be showing 52 mph, you will need to use a driven gear with more teeth to spin the speedometer cable slower. In this case, you need to add three teeth.
What is speedometer ratio?
The ratio shows the relationship between the speedometer input (cable rotation speed) and the speedometer output (reading), which takes into account such factors as the size of the front wheel & tire if the speedo is wheel driven, or the tail shaft gear ratios, final drive ratio, and the rear tire diameter on …
What is the difference between speedometer and odometer?
The odometer is the device which is used to measure the distance travelled. The distance travelled by vehicle between any two points can be known by the odometer. The speedometer is used to get the speed for instantaneous speed measuring.
What do you do with a speedometer and odometer?
Speedometer is used for measuring speed of an object and odometer for measuring the distance covered by the object .
How many gears do you need for a speedometer?
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.
Where is the drive gear located on a TCI speedometer?
The accompanying charts show what gears were manufactured for each type transmission. TCI® now stocks the most popular speedometer gears. Note: Drive gear refers to the gear that is on the transmission output shaft. The driven gear is located in a removable housing usually in the tailhousing of the transmission.
How many teeth are in a speedometer housing?
The number on the driven gear housing must match the number of teeth on the driven gear.
What kind of housing do you need for a gearshift?
Two housings, each made from either aluminum or plastic, are available for driven gears with 34 or more teeth. One fits gears from 34 – 39 teeth and the second one fits gears from 40 – 45 teeth. Two aluminum housings are available for driven gears with 34 or more teeth.