Can any one tell me if a rear wheel assembly for a nissan senta. is universal ? or is there a specific right or left.

Not sure of your exact vehicle as I have not had to work on one, but usually the wheel speed sensor is interchangeable from side to side, but not front to back.

Vehicle Speed Sensor (VSS) Inside automatic transmission assembly.
Wheel Speed Sensor-LF On left front wheel hub assembly.
Wheel Speed Sensor-RF On right front wheel hub assembly.
Wheel Speed Sensor (WSS) - LR Attached to left rear wheel hub.
Wheel Speed Sensor (WSS) - RR Attached right rear wheel hub

Shakes? Not very specific. It could be a loose wheel, wheel out of balance, the balance weights may have come off one or more wheel rims (check for the marks on the rims inner and outer rim where they used to be).
As 1996 model, it could also be worn out suspension bushes.
If you drive on a straight road, and you change from accelerating, to decelerating, does the car skew (turn left or right slightly), this would indicate worn suspension bushes at the rear, acceleration pushes the rear axle forward, deceleration pulls it back, if there is wear (slop) in the rubber bushes, the changing alignment of the rear axle causes the car to "throttle steer". At cruise, this could potentially set up a sort of harmonic motion, and cause a form of "shaking".

The 2002 Ford F-150 has known transmission problems, but this one is not specifically stated. See your dealer or mechanic.
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New FGTech Galletto 2
FGTech Galletto 2-Master V5.0

Go to YOU TUBE and put in replacing wheel bearing hubs for
nissan altima & watch

There is a lot to see even if on a different vehicle

I doubt you have the tools to do the job

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I'm Ben and -- hopefully -- I can provide some meaningful assistance.

Discussion

Replacing the rear wheel bearings on these vans is relatively simple pretty simple. However, the first thing that you must do is satisfy your self that it's the bearing and not something rubbing on a tire or something else back there in the rear.

Follow this steps to diagnose the problem:

1. Jack up the rear of the car
2. shake the wheel side to side and top to bottom.
3. if there is any wobble in it then it is a wheel bearing.
4. However, you cant alway tell by the shake test.
5. You can also go down the road and swerve side to side (being careful of oncoming traffic).
6. Iif you swerve to the right and the noise is loudest on the left side.
7. If you swerve to the left and its louder its on the right side.

How to remove and replace rear wheel bearings.

Before servicing the vehicle, refer to the Precautions Section of your User Manual.

Remove or disconnect the following:

1. Rear wheel
2. Brake drum or caliper
3. Wheel speed sensor, if equipped
4. Hub and bearing assembly from the rear axle

To install:

Install or connect the following:

1. Hub and bearing assembly. Tighten the bolts to 95 ft. lbs. (129 Nm).
2. Wheel speed sensor, if equipped. Tighten the bolt to 105 inch lbs. (12 Nm).
3. Brake drum or caliper
4. Rear wheel

use at your own risk. I can not confirm these.
+12V DC Battery(Constant) Yellow/green 31 15 Amp Fuse box on left front of engine compartment, near battery. Switched Accessory Purple 6 10 Amp Fuse block behind left side of dash Power Antenna NCA Green for antenna signal Illumination Red/yellow & red/blue Steering Wheel Control Wire Red/white, green, and blue If equipped, as for Mid-Line. Left Front + Blue/white Left Front - Blue/red Right Front + White/black Right Front - Blue/black Left Rear + Green/yellow Left Rear - Black/yellow Right Rear + Blue Right Rear - Red
AT SPEAKERS
Wire Function Color Note Left Front Tweeter + Blue/white Left Front Tweeter - Blue/red Right Front Tweeter + White/black Right Front Tweeter - Blue/black

remove the rear tires and the brake drums and check and see if the wheel cylinders are leaking

put on your spare doughnut tire and see if it's bent to .. if it is then you bent the axle not the rim.

Right turn - Green w/red stripe
Left turn - Green w/yellow stripe