1989 Mazda b2200

Drive Train Axles Bearings problem
1989 Mazda b2200 4 cyl Two Wheel Drive Manual 112000 miles

At 22mph and up the vehicle shakes whether the vehcile is in gear or out, motor is on or off. I have changed driveline, rear axle and springs/shocks, all wheels and tires (all balanced), checked alignment. Prior to getting a new driveline I was told it was out of balance, now I'm being told the drive line is binding. Is this possible and what causes it? Can I fix it at home? The shaking is slightly better when I have a hundred lbs or so in the bed, but it's still there. Thanks!
March 9, 2009.

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