Minggu, 26 Juni 2011

How to Change a Clutch on a Nissan Maxima

Manual transmissions utilize a clutch to engage and disengage the power from the engine to the transmission. This is necessary so that when you are at a complete stop, you can rest at idle without the motor stalling out. The clutch disc is sandwiched between the engine flywheel and the transmission pressure plate. When you switch gears and let off the clutch pedal, there is a short period in which the clutch is slipping to transmit the power in a controlled way. This slipping causes the clutch to wear over time and require replacement. Replacing the clutch in your Nissan Maxima is straightforward and is similar to replacing a clutch in any vehicle with some minor differences.
Difficulty: Moderate
Instructions
Things You'll Need
New clutch kit
Resurfaced or new flywheel
Jack
Jack stands
Transmission lift attachment for jack stand
1

Jack the vehicle and place on jack stands.
2

Drain the transmission gear oil so that it doesn't leak when you are removing the transmission.
3

Disconnect both drive axles (half shafts) from the transmission. To do this, remove the two bolts that hold the steering knuckle to the strut. Once those are out, you can easily pull the axles out of the transmission.
4

Remove the exhaust downpipe from the rest of the exhaust. It will be held on with two bolts at both ends and can be removed with a ratchet. Removing this piece is necessary to gain access to removing the transmission.
5

Disconnect any wiring connected to the transmission and remember where they go.
6

Disconnect the shifter cables connected to the transmission. These are the cables that transmit the motion from the shifter to the transmission. Use a ratchet to remove the shifter cable with its housing.
7

Remove the bolts holding the transmission to the engine block (there will be approximately seven or eight bolts). Place a transmission lift underneath the transmission to hold the transmission and lower it down. If you don't have a transmission lift, you can also use a transmission attachment for your jack.
8

Shake the transmission back and forth until it drops onto the jack. Pull the transmission straight back, ensuring that no pressure is put on the input shaft, and lower the transmission to the ground.
9

Remove the pressure plate and clutch disc from the flywheel with a ratchet. Then remove the flywheel with a ratchet and replace with a new flywheel or have your flywheel professionally machined at a machine shop. Torque the flywheel down to the manufacturer specification.
10

Place the clutch disc on the clutch disc alignment tool and insert the tool in the flywheel input shaft hole. Connect the new pressure plate to the flywheel and torque the bolts. Once the pressure plate is torqued down, remove the clutch alignment tool.
11

Grease the new throw-out bearing and place it on the input shaft of the transmission. Once the transmission is installed, it will push against the pressure plate.
12

Jack the transmission back into place and push the input shaft straight into the flywheel hole, and push the transmission into place and bolt it down to specification.
13

Reinstall the axles by pushing them into the transmission and reconnect the steering knuckle to the strut with the two bolts that were removed previously.
14

Reconnect the exhaust downpipe and wiring.
15

Add transmission gear oil to the transmission by filling it in the transmission fill plug until it begins to drip. Wait until the oil stops leaking out and tighten the plug.
16

Lower the Nissan Maxima to the ground.

Tips & Warnings

Removing the flywheel may prove difficult because as you turn the bolts on the flywheel, it turns. To stop it from turning, have a helper hold the crank bolt with a ratchet and large socket while you loosen the flywheel bolts.

The transmission is very heavy (150 lbs.) and could inflict injury if you are not careful handling it. If you aren't in good shape physically, this job is better left to the pros.

Wear safety goggles to protect yourself from injury.

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