'73 240z....Ok this may be a long shot but can somebody help me out here? About a week ago, my car developed some serious vibrating at speeds higher than about 30mph. This all happened gradually, but within about one day (i drive 40 miles/day).
The symptoms:
-entire car shakes as speeds increase, but seems to fall in and out of harmonics where it shakes less or more....
-the shaking is bad when in gear, but doesnt completely go away when coasting in neutral...
-engine doesn't shake at idle and revs freey as ever when car is stationary...
-no thumps or supension creaks, just shaking and mild humming...
-i had the car up on jackstands this weekend looking over the suspension, nothing wiggles or seems to be loose. didnt check tranny or motor mounts (maybe they sheared?)
-wheel bearings are fine, no play and spin freely when i checked this weekend.
-steering wheel shakes a bit, shifter is sturdy as always
-clutch grips fine
-Ujoints are fine
I've been bashing my head in trying to figure this one out. Obviously im not looking for a solution but rather any ideas you guys may have. Could the engine cause this? (it seems to run fine in neutral but lost some pull sinse all this started--i dont know if its an engine problem or just the vibrations killing horsepower). Ever seen a driveshaft get out of balance for some reason? Seems to me the vibations are from somewhere in the drivetrain (my tranny has been leaking oil). Any and I mean any ideas are appreciated.
Thanks,
Alex
The symptoms:
-entire car shakes as speeds increase, but seems to fall in and out of harmonics where it shakes less or more....
-the shaking is bad when in gear, but doesnt completely go away when coasting in neutral...
-engine doesn't shake at idle and revs freey as ever when car is stationary...
-no thumps or supension creaks, just shaking and mild humming...
-i had the car up on jackstands this weekend looking over the suspension, nothing wiggles or seems to be loose. didnt check tranny or motor mounts (maybe they sheared?)
-wheel bearings are fine, no play and spin freely when i checked this weekend.
-steering wheel shakes a bit, shifter is sturdy as always
-clutch grips fine
-Ujoints are fine
I've been bashing my head in trying to figure this one out. Obviously im not looking for a solution but rather any ideas you guys may have. Could the engine cause this? (it seems to run fine in neutral but lost some pull sinse all this started--i dont know if its an engine problem or just the vibrations killing horsepower). Ever seen a driveshaft get out of balance for some reason? Seems to me the vibations are from somewhere in the drivetrain (my tranny has been leaking oil). Any and I mean any ideas are appreciated.
Thanks,
Alex