Saturday, March 8, 2014
How to Install Speedo Gear
The "speedo" gear technically ers to the speedometer gear, which is a plastic or fiber gear that runs perpendicular to the output shaft of the transmission. The gear slides onto a hexagon or square shaft connected to a flexible cable that routes to the back of the speedometer. The gears come in various sizes matched to the tire circumference to yield an accurate mechanical speed measurement. It is important to periodically check your speedometer for accuracy. Many auto shops are equipped to do this. You can also check your speedometer with a windshield-mounted global positioning satellite (GPS) system.
Instructions
Installing a Speedometer Gear
- 1
Place blocks behind the rear tires on a solid level surface. Engage the emergency brake.
2Elevate the font of the vehicle by placing a jack under the front center frame of the vehicle. Insert two jack stands: one near each front wheel under the frame.
3Slide under the vehicle to the drivers side of the transmission near the back of the tail shaft. Search for the conduit like cable housing that inserts into the tail shaft of the transmission.
4Use a wrench to loosen and remove the small bolt that secures the clip to the transmission. Remove the clip that holds the cable and gear component into the transmission.
5Wiggle and pull the cable until it comes out of the transmission tail shaft. Be caul not to damage the O-ring that seals the gear assembly to the transmission. After removing the speedometer gear assembly, insert a shop rag in the hole to prevent oil from leaking.
6Slide the fiber speedometer gear off the square or hexagon cable end. Compare the new gear with the old one for similar size and configuration. Slide the new gear on the internal cable.
7Insert the speedometer gear assembly back in the transmission. Do not damage the O-ring on the assembly or oil may leak from this component.
8Jack up the vehicle, remove the jack stands and lower the vehicle to the ground. Remove the wheel blocks.
9Drive the vehicle and compare the speedometer reading with that of a GPS system.
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