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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 04-20-2004, 11:20 AM   #1 (permalink)
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I just bought an 86 325 es, and when I am making slow turns like parking, I'm getting this really nasty grinding noise/vibration from the rear end. I've never dealt with a car with a lsd, so I'm not sure if this is normal, or if the lsd is giving up the ghost. Of course the car has other gremlins as well, but those aren't my biggest concern right now. Thanks for your help!
p.s by the way, I've looked in the Haynes and the BMW Enthusiast's companion, and they don't really talk about the diff too much... otherwise I'd already be working on it.
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Old 04-21-2004, 08:03 PM   #2 (permalink)
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i have the same problem too. but i dont think it is as loud as yours. i dont know if you need a new differential or not. change the oil in the differential first before you rip it out. i have an 87 325 with 189,000 i will use 75w-90 or 80w-90. both will do the job. good luck
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Old 04-21-2004, 08:11 PM   #3 (permalink)
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check the fluid level
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Old 04-22-2004, 12:25 AM   #4 (permalink)
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I also have an '86 325 es i had the problem of a grinding sound as i turned slowly yet in the front. i could not find out what it was. i found that i was the simple thing that was the solution, the wheel well. as i turned the wheels to the right the wheel on the right rubbed the wheel well because it had worked it way loose. So in a word of advice for your dilemmas i say look for the simple answer before any drastic measures are taken on your part . because a solution is most often the simple one.
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Old 04-22-2004, 06:47 AM   #5 (permalink)
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If your have and LSD, add some friction modifier from a Chrylser dealer.
bottle costs 12 canadian dollar. It will reduce noise and make your limited slip device engage better.

check this thread:
http://www.bmw-forums.com/forum/topic11456.html
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Old 04-22-2004, 07:06 AM   #6 (permalink)
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i got the same prob in my eta, i was told it is prob just the clutch in the diff, engaging and disengaging, it's not uncommon for an LSD.
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