Please help me. Greetings from Slovakia. What can cause this loud knock sound ? it goes somewhere from transmission or driveshaft. i already changed second transmission,driveshaft,differential. (maybe I replaced the defective piece with a defective one too, but i dont think so) it knocks while i am driving on the road and it doesnt matter if i have it it neutral while going 50km/h or i have it in 1/2/3/4/5 gear. if the car is on the jackstands it DOESNT KNOCKING. VIDEO:
Sounds like the propshaft is out of balance. As said above centre bearing/Bush could be gone or fitted incorrectly.
ill look forward to that noise then when my cars back on the road. I forgot to mark my propshaft before I separated it.