So Fix it

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.

2

Elevate 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.

3

Slide 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.

4

Use 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.

5

Wiggle 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.

6

Slide 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.

7

Insert the speedometer gear assembly back in the transmission. Do not damage the O-ring on the assembly or oil may leak from this component.

8

Jack up the vehicle, remove the jack stands and lower the vehicle to the ground. Remove the wheel blocks.

9

Drive the vehicle and compare the speedometer reading with that of a GPS system.

Gear knobs on Jeep Cherokees may need to be replaced after a lot of wear. This is especially true if the Jeep has a manual transmission. The knobs start shifting on top of the gear shifter, causing discomfort when shifting. The automatic knob will last longer, but sometimes will need to be replaced because there is a breakdown internally in the shift-lock mechanism.

Instructions

1

Park the vehicle on a level surface and engage the parking brake. This will keep the car from moving.

2

Locate the locking ring on the bottom of the shifter knob. It will be around the bottom of the gear shift knob. It actually holds the shifter handle in place.

3

Pry down on the locking ring with the screwdriver. This is done by forcing or tapping on the screwdriver to loosen the locking ring when you try to move the locking ring. Because the ring is under the handle, the only logical direction is down to loosen it. Clean it with one of the toothpicks to remove debris or dirt. You can also pour some hydrogen peroxide on a soft cloth and wipe it to loosen the grit.

4

Remove the gear shift knob. This is done by grabbing both sides of the handle and pulling directly up. There is nothing holding it in place but the friction from the locking ring. On some models, you may have to pull up and a little to the left using a twisting motion.