Modifying Stock VLSD
 

Has anyone toyed with modifying the stock VSLD to lock up better. I've heard about changing shims, but understand this effects gear mesh. Are there other methods that are effective? I'd like to have a good working diff for the road course.

Better working VLSD = Buy aftermarket...

there is no way to upgrade a stock viscous - it is what it is

gear mesh and shimming have nothing to do with how the lsd works

kaaz/quaife

I would think improper gear mesh would have horrible effects on your drivetrain in general with increased friction and wear. I understand that gear mesh has nothing to do with diff action, but was curious if anyone has modified the viscous coupling in the stock diff. Apparently this diff is used in several models and has been around for a long time....

Anyway, I'm thinking I'll upgrade to OS Giken or the Cusco RS. Any comments on either of these diffs? I'm looking for a well mannered diff that doesn't require special fluid or maintenance every other weekend.

gear mesh would yes, but that has nothing to do with how the diff works though. The Viscous works by virtue of the fluid inside it, which is different from the normal rear end fluid, heating up. The viscous is a sealed unit

I did a post a few weeks back outlining the various diff options. Cusco and OS are both great choices. We run an OS in one of our Z's, and I've been running the Cusco in mine for about 5 years now. Biggest issue with the Cusco is you just can't get your hands on it right now without paying extra to air it in, or waiting a significant amount of time (few months). Demand has slowed down, so we're not bringing in the normal stocking orders we used to