LSD drain plug - metal filings

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Jan 30, 2012 | 09:54 PM

#31

Bill Ball

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From: Buckeye, AZ

I drained the diff fluid again today after another 100 miles and it looked clearer and there were no more metal filings on the drain plug magnet. I replaced the Redline 75/90NS with Mobil 1 LS. IMMEDIATELY the shuddering was gone. I don't know for sure if that is a good thing, but it no longer shudders on parking lot maneuvers. If I had a little more horsepower, I'd do a burnout and see if I get 2 stripes.

Jan 30, 2012 | 10:07 PM

#32

sgschroeder

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From: Ft. Collins Colorado

My 2 cent's worth-
Redline 75/90 NS is NOT the proper choice for an LSD!!! Either use 75/90(NO NS) or add Redline friction modifier. 75/90 NS has additives to enhance old LSD's friction Co-Ef and/or help older synchros. It is typically used in open-diff transaxles that share the same lubricant.

Apr 19, 2012 | 02:15 AM

#33

Bill Ball

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From: Buckeye, AZ

Quote:

Originally Posted by sgschroeder

You are quite right. So, the Redline response to James was incorrect. It's even clear from the bottle label information that we should be using 75/90 without the NS designation.

Apr 19, 2012 | 02:29 AM

#34

NoVector

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From: K-town, Germany

Quote:

Originally Posted by Bill Ball

You are quite right. So, the Redline response to James was incorrect. It's even clear from the bottle label information that we should be using 75/90 without the NS designation.

Would the same be true for systems with a PSD?

Apr 25, 2012 | 05:02 PM

#35

SteveG

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Quote:

Originally Posted by NoVector

Would the same be true for systems with a PSD?

This was never answered. I will PM Gregg just to be sure.
[Later] Gregg says he knows of no other "requirements" for the PSD, so his earlier recommendation stands.

Last edited by SteveG; Apr 26, 2012 at 04:15 PM. Reason: from Gregg

Apr 25, 2012 | 05:17 PM

#36

Bill Ball

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From: Buckeye, AZ

Quote:

Originally Posted by NoVector

Would the same be true for systems with a PSD?

I would think so. Redline 75/90 or Mobil 1 LS seem to work, and I would not use Redline 75/90 NS, at least in an automatic. I think the variable that may alter this is whether you are talking manual or automatic. As I recall Greg really likes Mobil 1 LS whether auto or stick, and didn't have a lot good to say about Redline. I have M1 in now and everything seems pretty good. ' should check the magnetic drain soon and see if there is any new metal.