09-23-2012, 09:33 AM
Join Date: Mar 2009
Location: Georgetown, Guyana
You really need to be a little more informative - what vehicle, what's been done to the vehicle/transfer case, when does it whine.
First - some degree of noise is normal, and is masked by insulation over the transmission tunnel and under the carpet, so if this insulation (along with the carpet) normal noise will be more audible - the same thing will happen if the rubber boots etc that seal the shift levers to the tunnel are missing.
Abnormal noises can be caused by worn bearings and/or gears, low lubricants levels and even some replacement gear sets, if lower gears have been installed, and I believe I have seen some after market transfer case mount manufacturers advocating the use of "solid" mounts, which will certainly transfer noide to a greater degree.
If you're getting a whine from a stock transfer case on a stock vehicle, it'll most likely be worn bearings.
98 - 1.8 Mitsubishi Pajero iO
98 - 2.0 Suzuki Grand Vitara - SQ420
05 - 2.0 Suzuki Grand Vitara - JB420
15 - 2.4 Kia Sportage