Nissan King Cab, Hardbody1991, D21, 4WD
This model has a history of failing Rear Drive-Shaft ( Propeller Shaft ) Center Support Bearing. It is actually most of the time the Center Support Bearing Assembly that fails, which is a rubber support for the center bearing.
The assembly is mostly sold as a package including the bearing, so it's mainly a choice of words. The bearing AND the assembly is changed as a package. The job is a easy to do as a DIY job, and in cases where it is a raised vehicle, it can be done without jacking up the vehicle.
- Vehicle body shaking during acceleration but as the speed levels out, the shaking is reduced
- Vehicle body shaking and vibrating appear intermittent.
- Vehicle shaking climbing a hill, but the shaking is even worse going downhill.
- Pressing or lifting the throttle pedal a bit reduces the vibrations.
- Vehicle shaking, almost popping the dental fillings, when taking of from standstill
This vehicle Drive-Shaft Center Bearing was hanging from only the upper part of the support, and this might have caused it to react worse to -load ( going downhill ).
The Bearing assembly is located at the rear end of Tube 1 on the Drive- / Propeller- Shaft. To be able to remove it, the two tubes of the shaft needs to be separated.
The tubes are connected by the Companion Flange, which is bolted to the front end of Tube 2.
- Undo the 4 bolts to release the Flange from shaft Tube 2, and push the tube front end aside.
- Undo the Lock Nut securing the Flange to Tube 1, and pull out the Companion Flange.
Take care NOT to lose the washer behind the nut. - The Bearing assembly upper and lower brackets are mounted to the frame by 2 bolts.
- Pull the Bearing Assembly and Bearing off the shaft tube.
Thoroughly clean the shaft end.
Add a coat of grease to the end face of the Bearing and both sides of the washer.
Note that there are several different types of drive-shaft solutions on the King Cab / Hardbody.
The description relates to the type in the picture below.
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If you are inexperienced working on projects like those mentioned on this blog, especially but not limited to
electrical or mechanical projects,please remember to read all safety precautions and use safety equipment.
Also remember that during the work, it is very possible to cause more harm to the vehicle than it initially had.
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