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Old 05-13-2017, 08:29 PM   #16
Metallated
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The list seems to indicate that manual 85 318i came with lsds, is this accurate?
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Old 05-14-2017, 05:19 PM   #17
TobyB
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I pulled a 3.64 small case LSD off of an 85 once. trunk said 318i

And a 2.93 LSD out of an 87e 4 door. trunk said 325

And a 3.73 LSD out of a 91 4 door. trunk said 325i


all I know,
t
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Old 05-14-2017, 09:04 PM   #18
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Quote:
Originally Posted by TobyB View Post
I pulled a 3.64 small case LSD off of an 85 once. trunk said 318i

And a 2.93 LSD out of an 87e 4 door. trunk said 325

And a 3.73 LSD out of a 91 4 door. trunk said 325i


all I know,
t
Thanks for the info, I guess I'll just have to pull it and find out.
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Old 06-08-2019, 06:25 PM   #19
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Bringing this back up to ask a question -

Our car is an '86 ES. We had the subframe off recently so I checked the tag, which checks out as a 2.93 LS. But I don't find any "S" stamp or casting on the case. Was that a painted stamp? I saw a reference to a cast-in S on the top.

I need to refill this diff, so now I'm wondering if it's an LS or not....?

Did I scrub it off when I degreased it?

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Old 06-08-2019, 07:52 PM   #20
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It was painted. Kinda like this:

The E stands for factory reconditioned.
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Old 06-09-2019, 02:18 PM   #21
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It's unlikely it was ever off the car, and then I wire-brushed it.

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Old 06-09-2019, 02:31 PM   #22
Rev Run D
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The easiest way to check if it's an LSD is to spin the rear wheels while it's off the ground. if they spin the same direction it's an LSD. If it spins opposite it's an open.
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Old 06-09-2019, 02:44 PM   #23
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Yep. We'll have to find a dirt road - it's an auto eta remember! (oh, OFF the ground you can check)

I just don't want to put the wrong oil in it.
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Old 06-09-2019, 02:54 PM   #24
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[QUOTE=LateFan;4983714] (oh, OFF the ground you can check)

Yeah, just lift the rear end off the ground so that the wheels are in the air, release the ebrake and put the car in neutral, and spin one wheel manually, and look at the opposite wheel to see what it's doing.
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Old 06-18-2019, 12:23 PM   #25
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If it's off the car, just try to spin the axles. If you can spin them opposite each other by hand, it's open. If you can't it's limited slip.
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Old 06-21-2019, 05:00 PM   #26
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That's a casting mark. You want a stamped flat metal tag under one of the bolts.

Or a burnout.

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Old 07-13-2019, 05:50 PM   #27
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The stamp3d tag will give you the ratio with an S indicating it's an LSD.
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