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Old 04-08-2014, 06:24 PM   #1
BlackBMWs
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Question What LSD fluid do you use for your street ti?

As the title says, what LSD fluid are you using in your street ti? I was lucky enough to pick up a small case 3.45 LSD from Dan and will plan to install it this weekend. I looked through various threads, but there was no clear answer other than fluid weight. I figure our responses can help other folks with similar questions in the future.

I see 75-140w for LSDs, although a 75-110w is used by some folks to keep heat down. 75-90w seems to be the spec for non-LSDs, although some folks are using it in their LSDs without apparent issues.

Dan mentioned he used Redline, which I have used in my non-LSD diffs. Not sure if a LSD modifier needs to be added to Redline.

What do you use? Whatever you use, do you hear any difference when you are driving? I ask as I tried Royal Purple when I could not find any Redline at one point in another non-LSD BMW and I experienced a whine when underway. Not sure if was due to the fluid change or if the properties were different than the BMW fluid. I went back to BMW fluid and the whine went away. Never was really sure what went on there.

Also, can you mention if you are running a LSD or a Torsen diff and if a LSD, is it a small case 3.45 or a E30 or other variant?

Anyway, thanks for your feedback! Rich
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Old 04-08-2014, 06:42 PM   #2
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I'm using Redline 75W90 in the LSD on my '95, according to bavauto.com it has the friction modifier already in it

mine whines a bit but it hasn't ever gotten worse
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Old 04-08-2014, 06:44 PM   #3
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+1 for Redline.
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Old 04-08-2014, 06:46 PM   #4
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Quote:
Originally Posted by DaRvDrUmS View Post
+1 for Red Line.
Thanks! Are you running a LSD or a Torsen diff?
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Old 04-08-2014, 07:05 PM   #5
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Jonathan at bimmerdiffs has stated that redline "shockproof" fluid causes LSD failures. Not sure what fails but he has mentioned that in other threads.

I've mostly used Mobil 1 and amsoil both have held up well at ~20k mile oil change intervals. 75w-110 is what I've been using in the Ti with small case LSD.
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Old 04-08-2014, 07:11 PM   #6
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Hi Dave! Yes I read the same threads for Redline "shockproof" which caught my attention. I wondered about the use of 75-90w for our LSDs.

there is a speed shop in town I'll head over to later this week and they carry Redline, Royal Purple, Valvoline and a few others where I can read the labels. Old school...

I'll open up the case hopefully this evening and inspect the inside.

Thanks again for all responses thus far.
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1998 318ti Sport - "Cali" Schwartz II/Schwartz sport interior, Cali top
1998 318ti Sport - "Max" Schwartz II/Schwartz sport interior, S52
1997 318ti Sport - "Tiny" Schwartz II/Schwartz sport interior
1995 318ti Active - "Blanca" Alpineweib III/Schwartz leather interior

Other Current Bimmers: 2000 2.3L Z3 / 1997 1.9L Z3 / 1991 318ic / 1999 540it

1997 318ti Sport - "Huera" - RIP
1995 318ti Active - RIP
1995 318ti Sport - "Tiny" Sold
1994 325i Sedan - "Jade" - Sold
1985 635csi sold
1984 533i "Max" Sold
1984 318i sold

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Old 04-11-2014, 01:06 AM   #7
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For those of you who mentioned you were using Redline for your duffs, were you using the GL-5 gear oil, or the Heavy Shockproof gear oil?

Thanks! 😎
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1998 318ti Sport - "Cali" Schwartz II/Schwartz sport interior, Cali top
1998 318ti Sport - "Max" Schwartz II/Schwartz sport interior, S52
1997 318ti Sport - "Tiny" Schwartz II/Schwartz sport interior
1995 318ti Active - "Blanca" Alpineweib III/Schwartz leather interior

Other Current Bimmers: 2000 2.3L Z3 / 1997 1.9L Z3 / 1991 318ic / 1999 540it

1997 318ti Sport - "Huera" - RIP
1995 318ti Active - RIP
1995 318ti Sport - "Tiny" Sold
1994 325i Sedan - "Jade" - Sold
1985 635csi sold
1984 533i "Max" Sold
1984 318i sold

BMWCCA #160411

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Old 04-12-2014, 02:25 AM   #8
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motul gear comp 75W140 ( blue color) for my 188( medium ) 3.73 LSD from a e30
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