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gomi_otaku
gomi_otaku, Technician
Category: Jeep
Satisfied Customers: 3378
Experience:  Dodge/Jeep/Chrysler dealership technician
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Noise in front diff.. whinning, 05 grand Cherokee 5.7,

Customer Question

noise in front diff.. whinning
JA: What is the model/year of your Jeep?
Customer: 05 grand Cherokee 5.7
JA: Are you fixing your Grand Cherokee yourself? What have you tried so far?
Customer: buying from car lot. they are trying to have fixed.. have installed all new diff bearing
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 2 months ago.
Category: Jeep
Expert:  gomi_otaku replied 2 months ago.

When they replaced the differential bearings, did they replace the crush bushing for the pinion shaft? Or how did they set the pinion shaft preload? It's possible that the preload is set wrong, and the bevel gears are engaging too high or too low on their contact area.