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www.ericthecarguy.com/faq/diagnosing-noises-in-your-car/...

So if you suspect a noise from the transfer case, replace the fluid with the correct fluid as dictated by the service manual and recheck for the noise. If the noise goes away, call it a win and move on. If not, you might have to replace or rebuild the transfer case.

www.onallcylinders.com/2012/03/30/quick-guide-to...

Quick Guide to Diagnosing Differential & Driveline Noises Posted by David Fuller on March 30, ... (TC) transfer case to this board I experienced a sudden breakage when a loud burring grinding noise came from TC while accelerating thru first 2-3 gears under light load, avoidable by creeping slowly up to speed

www.reference.com/vehicles/symptoms-bad-transfer-case-cc...

Symptoms of a bad transfer case manifest themselves differently depending on the extent of damage within this important drive-line component. According to AAMCO, the most obvious sign of transfer case failure is the complete loss of four-wheel or all-wheel drive.

www.jeepforum.com/forum/f9/weird-noise-seems-coming...

Weird noise, seems to be coming from the transfer case. Need diagnosis! This has been going on for a couple months now off and on and now it's staying constant.

www.holmanparts.com/.../10_TransferCaseDifferentialFailureMode_v2.pdf

TRANSFER CASE AND DIFFERENTIAL FAILURE MODES AND DIAGNOSIS TECH NOTES TRANSFER CASE Transfer Cases are very sensitive to any external changes due to their integration with the rest of the powertrain control system in today’s vehicles. IN GENERAL, THE NUMBER ONE REASON FOR A TRANSFER CASE FAILURE OR CONCERN IS THE TIRES.

www.youtube.com/watch?v=Na63l673cg8

09 wrangler auto 2dr x, 2.5 bb, 33x12.5.... ~27k miles pulling out from the driveway with 4wd engaged... noise is still there but not as bad when without 4wd

www.therangerstation.com/tech_library/transfercasetroubleshooting.htm

Transfer Case Difficult To Shift Into Desired Range. Transfer Case Noisy In All Gears. Transfer Case Noisy Or Jumps Out Of 4x4 Low Range. Lubricant Leaks From Vent Or Output Shaft Seals. Troubleshooting 1995 & Newer Electric Shift Transfer Cases. Diagnosing 1994 & Older Electric Shift Transfer Cases

wranglertjforum.com/threads/need-help-diagnosing-noise...

How does the sound persisting into 4hi rule out the transfer case? Wouldn't the chain be spinning for both 4hi and 2hi? As I have had someone say it could possibly be chain slapping inside the case, but I don't know enough yet on how the TC works to say that's what it is or what that would sound like.

www.yourmechanic.com/article/symptoms-of-a-bad-or-failing...

Symptoms of a Bad or Failing Transfer Case Output Shaft Seal ... The physical part of the vehicle that activates this action is the transfer case, which has an output shaft that delivers power to the drive axle. From time to time, the seals that connect these components together can dry up, wear out, or break. ... these noises are caused by the ...

www.freeasestudyguides.com/four-wd-transfer-case-chain...

Transfer Case Diagnosis. If a pop is heard when the vehicle is placed into 4WD, it’s caused by excess slack in the chain striking the case and then snapping back into position. To test a transfer case for excessive slack, place the vehicle in park and engage the parking brake.