i just got my jeep last month and been wondering what's the whining noise when accelerating at 100kph and its gets louder until i reach 140kph it stops. it sound like i have a TC or SC. and when i let off my foot on gas pedal, i didn't hear any whining noise and when i let my foot on the gas pedal again, i can hear that noise again.
can anybody heard this noise too?
btw, just replaced differential gear oil with lucas 75w-140 and added friction modifier but i still hear that whining noise. i took off the cover and drain the oil, and found some metal shavings on the oil.
were your diff's making noise before you changed the oil?
yeah, it making the same noise before i changed my diff oil.
in addition to that, i feel some vibration (wwrrr... wwrrrr..) in the floor and in the seat as the noise faded when i reached 140kph and when i gas it up until 160kph the noise and vibration totally gone...
Had the same thing with my 2005 Grand Cherokee it ended being the cv joint that connects the front drive shaft to the transfer case. The boot was torn and it caused it to wear out because of dirt and lack of grease. Just replaced it yesterday and the noise during acceleration is gone. It was a pretty easy job I used a Dorman replacement part which was only about $80 and it was a perfect match, the only thing was that the new mounting bolts were a little too short so I used the old ones. Took about 4 hrs start to finish.