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Ask Chris (aka-Moose) Your Own Question
Chris (aka-Moose)
Chris (aka-Moose), Technician
Category: Jeep
Satisfied Customers: 48343
Experience:  16 years of experience
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Drive train humming between 60mph and 70mph, jeep commander

Customer Question

drive train humming between 60mph and 70mph
JA: What is the make/model/year of your car?
Customer: jeep commander 2007
JA: Are you fixing your Commander yourself? What have you tried so far?
Customer: 3.7 liter basic model, DIY replaced rear shaft propellar
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 10 months ago.
Category: Jeep
Expert:  Chris (aka-Moose) replied 10 months ago.

Welcome, I'm Chris (aka Moose), my normal schedule online is around lunch and after dinner past midnight.

When this is occurring if you swerve does this make the noise change or come and go?

Does this noise come and go based on coasting, braking, or accelerating?

Customer: replied 10 months ago.
Swerving doesnt effect it
when you coast or decelerate the humming instantly stops.
Expert:  Chris (aka-Moose) replied 10 months ago.


That symptom fits that of a rear axle pinion bearing preload no longer adequate causing the pinion to pitch up or down and its contact on the ring gear no longer correct. I recommend finding a good axle tech and have them drive the vehicle to see what they think and outline the repair and fees that is needed.


Prior to completing the mandatory rating at the top of your screen. Let me know if I have not yet provided you with ~5 STAR EXCELLENT~service. Reply and let me know in more detail what you need to be pleased with my help.

Thanks Chris

Expert:  Chris (aka-Moose) replied 10 months ago.

Hello again Chris here,

  • Sorry you were not pleased with my help.
  • What would you like to do regarding your question now.
  • This post is coming up on the 7 day mark where it times out. When a post times out, that means it's no longer on my active list (you reply and I may never know it.)

Thanks Chris