dumb nub question on differential

Bill128 · 05-09-2024, 09:17 PM

I have an 2006 330 xi. AWD

do all wheel drive cars have limited slip rear diffs? I ask because I am getting a noise like a mortar and pestle...rolling and grinding...noise at low speed and sharp steering angles. I wonder if it could be an LSD problem?

Also, the manual says there are many didffferent kinds of lube. Some lubes are for LSD and some for opens. How do I figure out which one I need?

TIA

Suvorovo · 05-15-2024, 12:29 PM

Same car, 6 speed. I also have the same issue at low parking lot speeds on left turns only. Hopefully someone will chime in. Sometimes I hear it, sometimes I don't. I suspect it's something to do with parking brake/adjustment or other brake hardware. My rears are severely worn out and will be replacing them shortly and differential fluid was replaced at 90k by previous owner and 130k by me.

We do not have LSD. 75W90 will do just fine.

05-09-2024, 09:17 PM	#1
Bill128 Enlisted Member 3 Rep 31 Posts Drives: BMW 128i coupe Join Date: Jun 2018 Location: RI iTrader: (0)	dumb nub question on differential I have an 2006 330 xi. AWD do all wheel drive cars have limited slip rear diffs? I ask because I am getting a noise like a mortar and pestle...rolling and grinding...noise at low speed and sharp steering angles. I wonder if it could be an LSD problem? Also, the manual says there are many didffferent kinds of lube. Some lubes are for LSD and some for opens. How do I figure out which one I need? TIA
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05-15-2024, 12:29 PM	#2
Suvorovo Lieutenant 258 Rep 504 Posts Drives: Broken e90 330xi 6MT Join Date: Feb 2022 Location: New Jersey iTrader: (0)	Same car, 6 speed. I also have the same issue at low parking lot speeds on left turns only. Hopefully someone will chime in. Sometimes I hear it, sometimes I don't. I suspect it's something to do with parking brake/adjustment or other brake hardware. My rears are severely worn out and will be replacing them shortly and differential fluid was replaced at 90k by previous owner and 130k by me. We do not have LSD. 75W90 will do just fine.
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