Rear differential bearings out...again
So here's the short story:
My dad has an '05 WK Limited HEMI just like mine. At about 100k on the clock (11 months ago), he started getting the "whoosh" sound from the rear and the dealer diagnosed the rear diff as having toasted bearings/seals, etc.
He ends up paying a bit over $2g's for the repair (wow dealer labor) and it fixes the problem...for 11 months. So my parents go to Texas and back and the noise is back. They take it to the dealer.
Lo and behold, same diagnosis. The repair came with a 12month/12,000mi warranty and thankfully they literally JUST fall into the warranty. The service advisor was SUPER surprised when my mom had her look up the repair and said she was sure that had been done about a year ago.
So the crux of the question is: what could possibly have caused the bearings/seals, etc all to fail within 12k miles/1yr?!
I'm initially thinking they did a crap job on the installation/tuning of the rear but I'm lost.
P.S. my Dad drives this Jeep daily and it sees 90+% highway driving only. He is almost never in stop/go traffic.
Any help is much appreciated!
'05 WK GC 5.7L HEMI, Goodyear Wrangler SilentArmors, Monroe Reflex Front Struts/Monroe Load Adjusting Rear Shocks, EBC Drilled/Slotted Sport Rotors, Wagner Ceramic Brake Pads, Taylor Shorties, SRT8 Stock CAI Conversion, K&N Drop-in, Block Heater, 18.5% Tint All Around, Boston SE Speakers, 12" Alpine Type-R Sub w/ sealed box w/ RF PRIME R1000-1D, ScanGauge II w/ windshield mount, BT Catch Can w/custom bracket, Swagman Fork Mount Bicycle Rack, WeatherTech front floor liners, SRT8 Pedal Covers, eBay full LED lighting kit, Custom MDS Indicator LED Light, Mega Raizin Voltage Stabilizer & Grounding Kit, Challenger IAT Sensor, Escort Passport 9500ix, Python 5706P RS/Security/KE w/ extras, SA 5 switch panel, Fumoto Oil Valve, Overland WG Steering wheel.