bat
Explorer
I have been having this droning /vibration noise in the front drivers side for awhile, after much research I decided it was a needle bearing in the diff on the outboard drivers side. The test which I felt was the best (internet find) was driving at 30 mph causing vibration and putting it into 4hi which would stop the vibration. The outer bearing is a needle and the inboard bearing is a cone bearing. I could be wrong on this but putting it in 4hi was causing the inner cone bearing to take the some weight of the axle of the needle bearing to stop the vibe. I decided to take my truck to Kearny Mesa Toyota to have it looked at to see what was up. After 2 days of having my truck and Toyota engineers looking they said the needle bearing was toast and putting a new diff and driver side cv axle in under warranty. My truck is a 2007 46k miles CC 4x4 lb with a lift and taking to the dealer with the stuff on it I was a bit nervous. I must say Kearny Mesa Toyota stepped up to the plate and treated me like a dealer should when someone has a problem that should not happen in that time frame.They will have my truck for 6 days so a loner car was offered for free that is great service .