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Registered User
Join Date: Aug 2010
Location: Rotherham England
Posts: 6
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Noist rear differential
Hi All
I am a newcomer to this forum and am in the UK, and I would like to ask a question. I have just got a 1988 318i saloon, with 120K miles. It has a noisy rear diff, and I wondered about putting a thicker oil in to quieten it down? Any other useful suggestions (other than change the diff......) gratefully accepted. Many thanks Mark |
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09-16-2010, 06:55 AM
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Registered User
Join Date: Sep 2010
Posts: 180
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Have you checked the oil already? Level and quality? Try doing an oil change on it first. I guess these things are pretty hard wearing and when they start making a noise it can only be due to wear or damage. You should be able to find one in a scrapper or breaker and its not too hard to change over, just a bit messy and a good time to do the drive shaft boots too!
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09-17-2010, 05:45 AM
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Registered
Join Date: Oct 2005
Location: Florida
Posts: 668
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Are you sur it is diff? If the dif has oil they rarely fail.
It has a drive shaft center support bearing. Also wheel bearings make a rumbling sound when they go bad. You may try jacking it up on jack stands and run it. For safety sake, I usually take the rear wheels off, god forbid it falling off the stands, but if so, it wouldn't take off like a top fuel dragster.
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74 911 targa blk on blk, Carrera fend., tires & whls. gone, missed 85 325e bought new, totaled after 20 years & 465K miles, trouble free service. 01 Ford Ranger 4dr stpsd 4wd. I drive,here 88 325i convert. only 98k miles,gone, sold 93 325i.here, 98 Z-3 roadster. gone, 08 128 cabro gone |
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09-17-2010, 09:45 AM
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Registered User
Join Date: Sep 2010
Posts: 1
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These diffs whine all the time. You can use the redline 75w140 synthetic gear oil and it will help to some degree reduce noise. You will need 2 quarts. Change it no matter what, at 120k its more than due. Make sure you check out the driveling and wheel bearings as mentioned above. the handbrake is also a common noise maker.
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09-22-2010, 03:37 PM
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