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615 (similar to D15 SII) final drive noise?

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Dean (West MI) View Drop Down
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Joined: 12 Sep 2009
Location: West Michigan
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dean (West MI) Quote  Post ReplyReply Direct Link To This Post Topic: 615 (similar to D15 SII) final drive noise?
    Posted: 29 Nov 2018 at 7:03pm
I have a 615 that has always had calcium chloride in the rear tires. There is a loud growling noise coming from the left rear axle.  Right now, my best guess it is coming from the final drive.  While I understand final drives can be noisy, the left side is noticeably louder than the right side.  If I remember correctly, the noise was louder in 1st gear wide open than 4th gear wide open.

Sorry, I am not giving everyone much to go on, but any idea what the noise may be?  I'll be tearing into it in a few weeks, and am looking for any suggestions to check.

Also, before the wheel weights and calcium goes back on/in, what else should I service.  Do the wheel bearings go bad?
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JohnCO View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote JohnCO Quote  Post ReplyReply Direct Link To This Post Posted: 29 Nov 2018 at 10:58pm
I would guess it's a wheel bearing or differential support bearing.  Always check the gears for wear, bearings and pinion shafts.  Flush out the housing (if gunky) and put in new oil.  Hopefully, others will have better advice.

"If at first you don't succeed, get a bigger hammer"
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orangeman View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote orangeman Quote  Post ReplyReply Direct Link To This Post Posted: 16 Dec 2018 at 9:33am
Dean- In the early 70's AC released a service bulletin on the rear final drive bearings on the 615 units. 

PM me if you need a copy. 

Orangeman
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