Also check the CV joint at the transfer case end of the front driveshaft. Sadly, even mechanics at dealerships skip right over that CV...
It is right under the driver's seat so its noises sound like they could be coming from the rear axle or even the front wheels. It's easy to check - have your mechanic lift it up, shine a flashlight at the transfer case end of the front driveshaft and look for torn or missing rubber boot around the joint. Most likely it's torn or missing.
If it's bad, DO NOT replace the entire driveshaft even though the mechanic will say you need to. Their suppliers typically don't sell just that CV - they sell the entire shaft. However, you can purchase the CV joint for about $60 with shipping from driveshaftparts.com. Many of us have gone this route and its been fine - I replaced mine in about 45 minutes (took a little longer cuz I painted the driveshaft black!) so your mechanic should have no problem.
If the CV joint is fine...then I just got a lot of practice typing on my phone ;-)
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2003 Renegade, Black
- 3.7L, 42RLE, 4.10's, ARB Bull Bar, Smittybilt XRC 9500lb Winch, 4X Guard Trans skid, Skid Row Engine skid, Factory T-case & Tank skids, Custom BoulderBars, JBA Front Coilovers, OME 948 rear springs, Bilstein rear shocks, JBA A-Arms, Moabs with Goodyear Duratracs 265/70-16