Miata Mailing List: May 1997, Message #198
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From: 	"M. Roadster Performance" <percy@mroadster.com>

Subject: Re: Viscous LSD Identification and repair

Date: 	Fri, 2 May 1997 10:36:02 -0500



=46LETCH:



There's been a rash of busted diff's. This one's been dear to my heart

after I thought I was done "fixing" LTLVPR for fast times and my diff went

south. My bill came to $1400. I was given the option for an LSD at $2200.



Though some say there aren't any identifying marks on the LSD, I find that

a Miata at open throttle in a right or left turn from a dead stop will

determine this.



The standard diff will spin and slip when doing this.

The LSD should power right through it.



My 2=A2.





>Its been asked before, but I've never seen a definitive answer...

>

>A friend has a spare diff, not in a car, that he thinks is the viscose

>LSD from a '90.

>Does it have any identifying part number, or feature (i.e.. twist this,

>watch that) that will confirm this easily.

>

>Do these items have a common failure. It was removed from his car by the

>dealer and replaced with a new one, before sale, because it made a noise.

>Is it totally shagged, or can I expect to replace a couple of bearings

>and have an LSD in my car?

>

>I know the torsen is the way to go, but surely a viscous is better than

>open right?  I've been doing gymkhanas on grass and loving it. I expect

>this should help get my times down a bit eh?  (mucho wheelspin)

>

>Thanks for any advice...

>

>Fletch,

>

>Red '90

>fletcher.blades@newzealand.ncr.com





Percy & LTLVPR

Owner Guy



M. Roadster Performance

San Ramon, CA



http://www.mroadster.com



"Less clients, more personal attention"  -Jerry Maguire



1991 A-pkg, Super "M" Spec-123,000 miles