Diahatsu 1999 Terios shudder

Car shudders badly at 40 to 50kph. shudder then lessens but remains. Have checked tailshaft wheel balance etc. Continues to shudder with engine turned off and in neutral at same speeds. have had on ramp with wheels and shaft off and still shuders/vibrates at same speed. Any help

Try these ........

1.Worn universal joint on prop shaft.
2.An engine mount is weak or broken.
3.Check steering linkages for wear.
4.Top and bottom ball joints.


Bolt torque is 43.4 - 57.9 ft/lb.