Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Input shaft bearing noise › Reply To: Input shaft bearing noise October 29, 2020 at 10:06 pm #986895 BillyParticipant A top-quality fluid like Amsoil Severe Gear or Redline can sometimes work wonders on failing syncros, I’ve seen a miracle or two. I wouldn’t be optimistic about an input shaft bearing, but it might be worth a shot.