The prop shaft is a 2 piece tube with a flexible joint in the center.
The front half and the rear half are mated and balanced by the manufacturer.
If you change the orientation of the front half to the rear the prop will be out of balance.
Look for a mark on the front half and try and find it on the rear half and make sure they are in line when you mate it again.
If no marks which line up and no balance the car will vibrate.
The front half and the rear half are mated and balanced by the manufacturer.
If you change the orientation of the front half to the rear the prop will be out of balance.
Look for a mark on the front half and try and find it on the rear half and make sure they are in line when you mate it again.
If no marks which line up and no balance the car will vibrate.