Hi Team
I have a vx80 1990 4.2 manual I towed my boat off the beach the other day with the centre diff lock engaged now it has a low humming vibration under load mainly around 90 kph if you hold the throttle stable on it is a noticeable low tone vibration but doesn’t sound like it’s comeing from any certain spot .. if you take your foot off the accelerator it stops but as soon as load comes back on it starts again .. if you also jerk the accelerator theres a noticeable clunking in the drive line somewhere . I thought maybe a bearing in the front shaft to transfer case or god hopping not the big end bearing .. the ball joints seem solid and there no noticeable play then trying to move them by hand
Any help on where to begin or how to try isolate it would be amazing
No sign on any oil or leaks
Cheers
Craig
I have a vx80 1990 4.2 manual I towed my boat off the beach the other day with the centre diff lock engaged now it has a low humming vibration under load mainly around 90 kph if you hold the throttle stable on it is a noticeable low tone vibration but doesn’t sound like it’s comeing from any certain spot .. if you take your foot off the accelerator it stops but as soon as load comes back on it starts again .. if you also jerk the accelerator theres a noticeable clunking in the drive line somewhere . I thought maybe a bearing in the front shaft to transfer case or god hopping not the big end bearing .. the ball joints seem solid and there no noticeable play then trying to move them by hand
Any help on where to begin or how to try isolate it would be amazing
No sign on any oil or leaks
Cheers
Craig