'09 Legacy 2.5i Special Edition EJ253 / TY758. For the last week or two I've been getting a noticeable whine that:
-does *not* vary w/ engine RPM
-does *not* vary with the clutch engaged / disengaged
-does vary with wheel speed
A couple nights ago I put four jackstands under it, got it up to 3rd gear, jammed the accelerator w/ a two-by-four and crawled under it with a stethoscope:
-When sitting in the front I can hear the whirring
-Left-hand wheels I could *not* get to stay turning
-Right-hand wheels I could get to spin; aside from some spinning noise (*whoosh*) I didn't hear anything from the bearings
-At the front of the transmission / front diff / center diff assembly it was mostly spinning noise (*whoosh*) and a hint of a whirr
-At the rear of the transmission / front diff / center diff assembly and aft mount I could clearly hear whirring
I drained the old Redline 75W90NS fluid 9000 miles early (only 21000 miles on the fluid; was dark grey in the waste container) and filled it w/ fresh Mobil 1 75W90LS fluid.* That did a little to quiet the whirr, but I can still hear it.
What are your thoughts?* Center diff bearing?* Output shaft bearing?
If I'm missing a thread where this has already been covered, kindly reply with a link. Thanks in advance.
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