Modifying Stock VLSD

rbratton · 10-31-2009, 12:34 AM

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.

OMEGA46 · 10-31-2009, 05:43 PM

Better working VLSD = Buy aftermarket...

Z1Performance · 10-31-2009, 07:44 PM

Quote:

Originally Posted by rbratton

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.

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

vipor · 10-31-2009, 08:59 PM

kaaz/quaife

rbratton · 11-01-2009, 05:30 PM

Quote:

Originally Posted by Z1Performance

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

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.

Z1Performance · 11-02-2009, 08:27 AM

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

10-31-2009, 12:34 AM	#1 (permalink)
rbratton Base Member Join Date: Jan 2009 Location: Vine Grove, KY Posts: 89 Drives: 2009 370Z Rep Power: 16	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.

10-31-2009, 05:43 PM	#2 (permalink)
OMEGA46 Base Member Join Date: Jun 2009 Location: CT/MA Posts: 24 Drives: G37IPL Rep Power: 16	Better working VLSD = Buy aftermarket... __________________ 06MB \| AP Racing \| EiBach \| Hotchkis \| Injen \| Borla \| Cusco \| Carbon Roof \| Car PC \| HK USPc .45 \| Magnaflow X-Pipe \| Volk TE37 TA\| RAYS ENG. \| MICHELIN® Pilot® Sport PS2™\| Megan Racing \| Nismo \| Cherry Air Freshener

10-31-2009, 08:59 PM	#4 (permalink)
vipor A True Z Fanatic Join Date: Aug 2009 Location: Euless, TX [ DFW ] Age: 42 Posts: 13,531 Drives: Nismo 09-0183 QAB Rep Power: 49	kaaz/quaife __________________ 2009 NISMO # 0193 \| QAB \| Albums! \| 05.04.10 (Dynojet) 291.94hp/248.28tq Oil Cooler (DIY) \| Custom Headlights \| GTSPEC Braces \| F.I. Long Tube Headers

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11-02-2009, 08:27 AM	#6 (permalink)
Z1Performance Base Member Join Date: Aug 2009 Location: St. James, NY Posts: 237 Drives: 350Z Rep Power: 16	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