How do I know what Speedo gear I need?
To determine your tires true diameter in relation to determining what speedometer gears you need, measure from the ground up to the center of the axle then multiply by two. The actual run out of the tire can be as much as 2 to 3 inches less than what the circumference of the tire measures.
Where is the speedometer drive gear typically located?
output shaft
They have 2 gears that work together to measure vehicle speed. These “Speedo Gears” are usually located in the transmission. The Drive Gear is located on the output shaft.
How does a speedometer gear work?
A flexible drive cable inside a flexible tube links a small magnet inside the speedometer to the gearbox output shaft. 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.
How does a Speedo drive work?
A car with a digital speedometer uses a speed sensor, which usually consists of a magnet surrounded by a wire coil, quite like the pickup on an electric guitar. The sensor is mounted directly next to a gear on the transmission, and as the gear spins, its teeth whiz by, interrupting the magnetic field on the sensor.
Which gear is the drive gear?
The “input gear” (also known as drive gear) transmits power to the “output gear” (also known as driven gear). The input gear will typically be connected to a power source, such as a motor or engine.
Is the speedometer connected to the transmission?
The speedometer uses a rotating flexible cable usually driven by gearing linked to the output of the vehicle’s transmission. The early Volkswagen Beetle and many motorcycles, however, use a cable driven from a front wheel.
Are 700R4 transmissions good?
The 700R4, produced by General Motors/Hydramatic, is considered one of the best overdrive transmissions ever made. This transmission had a lower first gear ratio, which was good for performance at low vehicle speeds, while the 30% overdrive provided significant fuel economy improvement.
What year is good for 700R4 Trans?
The 700R4 transmission was used in cars between 1982 and 1993. Specifically, it could be found in trucks and rear-wheel-drive cars including: That being the case, the widespread use of the 700R4 (4L60) was 1992. Also, the 1993 Corvette, Camaro, and Typhoon were the vehicles to feature the last production of the 700R4.
How to figure speedometer gear?
To determine your tires true diameter in relation to determining what speedometer gears you need, measure from the ground up to the center of the axle then multiply by two. The actual run out of the tire can be as much as 2 to 3 inches less than what the circumference of the tire measures.
What is a speedometer drive gear?
Ford, Chrysler & GM speedometer gears are composed of a “drive” gear and a “driven” gear. TCI® offers “driven” gears for Chrysler, Ford & GM. Ford “drive” gears are machined into the output shaft; tailhousing may need to be removed to determine number of teeth.