Hello all,
Got an issue I can’t seem to pinpoint. I have my 03 Tahoe, all the u-joints were replaced and everything is balanced but I am experiencing a vibration under my seat at 70mph. Has 152,000 miles on it.
Possibly transfer case going bad? Any ideas?
Thanks,
Nick
Wait, so did you 40mph go away and now you have it at 70mph? Or are you dealing with multiple? Balancing tires is the easiest, after that you can try to chase it else where if it didn't go away after that.
Vibrations could be caused by anything rotating at the right frequency.
Drive shafts/Hubs/CV's/tranny/Tcase/Diffs/Bentwheels/Out of round tire/fallen weights/ I would say most of the time it ends up being tires followed by the ds that has been worked on. What kind of a vibration is it also, is it booming, or just pure vibration? Driveshafts usually have the booming effect, hard to miss as its a unique noise accompanied by vibration around the seat area, I'm also in the same boat with an E150 that I haven't had the time to check out, it vibrates around 65mph and it is smooth at around 75+ mph.
One last question, by having everything balanced did you mean tires and drive shaft, or just tires? As I've mentioned before too. Make sure the ds is in the correct phased orientation, I know I've said this several times but mine vibrated at the same speeds you describe and it boomed while deceling 70-80 range give or take.