Is VLSD in Sport Package really useful ?

felix0121 · 06-02-2017, 07:36 PM

Quote:

Originally Posted by YzGyz

Umm.. am I reading this correctly? You guys are saying that the vlsd is only as good as the vlsd oil inside. Even if you change the oil for the vlsd, it is still toasted after 60k miles? This is because the vlsd and the oil in the pumpkin is separate from the vlsd? I have open my diff cover 2x. I never seen any separate oil inside. I'm no expert or anything like that but I'm 99% sure that changing the diff fluid is all that is needed to maintain the vlsd.

YzGyz

I wonder it too.

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ChopsZ · 06-02-2017, 09:07 PM

One of many reasons why I bought a base model Z. Even when new, the VLSD is basically useless (open) after it heats up. Why pay extra for something like that?

When the time comes, I'll get the Tomei 1.5 way LSD, and upgrade to the 3.90 ring as well just for a little added "oomph".

YzGyz · 06-03-2017, 12:00 AM

Ahh, I see.

YzGyz

Z_ealot · 06-03-2017, 12:04 AM

OP you don't have to wonder, Rusty just explained it to both you and yzgyz

Jhill · 06-03-2017, 01:11 AM

Well I know the vsld doesn't engage after heat up but I'm not really sure it wears out? From my understanding (zero vlsd experience but enough corvette clutch type) the vlsd works similar to something like a AT torque converter (without a TCC luck up clutch). Really no moving/ friction parts to wear and silicon fluid can take a ton of heat cycles. I'll trust others who've experienced it fail but I was just planning to get a z1/ nismo diff cover to help keep it cooler longer (not competitive enough to buy a Gilken).

Rusty · 06-03-2017, 03:01 AM

Quote:

Originally Posted by Jhill

Well I know the vsld doesn't engage after heat up but I'm not really sure it wears out? From my understanding (zero vlsd experience but enough corvette clutch type) the vlsd works similar to something like a AT torque converter (without a TCC luck up clutch). Really no moving/ friction parts to wear and silicon fluid can take a ton of heat cycles. I'll trust others who've experienced it fail but I was just planning to get a z1/ nismo diff cover to help keep it cooler longer (not competitive enough to buy a Gilken).

When new, the silicone fluid is thick. As it heats up. It becomes thinner. That's why during a track session. People noticing it going away. After cooling off. It comes back Now after so many miles. The fluid becomes thinner as it wears. That's why you read about people noticing the change in it's action. Once it wears, it doesn't come back.

Jhill · 06-03-2017, 06:52 PM

Quote:

Originally Posted by Rusty

When new, the silicone fluid is thick. As it heats up. It becomes thinner. That's why during a track session. People noticing it going away. After cooling off. It comes back Now after so many miles. The fluid becomes thinner as it wears. That's why you read about people noticing the change in it's action. Once it wears, it doesn't come back.

I grasp the concept I'm just surprised the fluid breaks down so quick with no real debris exposure etc. not doubting it just surprising. Sucks I guess one more thing to plan on buying down the road, probably do a quaif/wavetrace type.

cloudofevil · 06-03-2017, 08:19 PM

Quote:

Originally Posted by Jhill

I grasp the concept I'm just surprised the fluid breaks down so quick with no real debris exposure etc.

It's a polymer so mechanical shearing and heat will break down the polymer chains over time.

felix0121 · 06-03-2017, 02:51 AM

Quote:

Originally Posted by Z_ealot

OP you don't have to wonder, Rusty just explained it to both you and yzgyz

I read it after my posting. Thanks.

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ScottM · 06-08-2017, 05:47 AM

and potential axle(s) on top of that price if your a base open diff.
EDIT: My bad I guess that Z1 sells it complete with them.

06-02-2017, 09:07 PM	#2 (permalink)
ChopsZ Track Member Join Date: May 2016 Location: Central Florida Age: 50 Posts: 965 Drives: 2016 370Z GM 6MT Rep Power: 2303	One of many reasons why I bought a base model Z. Even when new, the VLSD is basically useless (open) after it heats up. Why pay extra for something like that? When the time comes, I'll get the Tomei 1.5 way LSD, and upgrade to the 3.90 ring as well just for a little added "oomph". __________________ She's For Sale! PERFORMANCE: Aero Workz \| Akebono \| BC Racing \| EcuTek \| HKS \| MaxBore \| Motordyne \| Nismo \| RJM \| SPL \| StopTech \| Z1 AUDIO: Arc Audio \| Bazooka \| Helix \| Pioneer \| Stereo Integrity

06-03-2017, 12:00 AM	#3 (permalink)
YzGyz A True Z Fanatic Join Date: Jun 2013 Location: Houston Posts: 1,449 Drives: 2010 Nismo Rep Power: 64	Ahh, I see. YzGyz __________________ http://www.the370z.com/members-370z-...gyzs-turn.html YzGyz

06-03-2017, 12:04 AM	#4 (permalink)
Z_ealot A True Z Fanatic Join Date: Sep 2010 Location: Albuquerque, NM Posts: 2,045 Drives: 09 370Z Touring/Sprt Rep Power: 10092	OP you don't have to wonder, Rusty just explained it to both you and yzgyz Rusty likes this.

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06-03-2017, 01:11 AM	#5 (permalink)
Jhill Track Member Join Date: Mar 2016 Location: San jose Posts: 855 Drives: 2013 370z sport Rep Power: 3386	Well I know the vsld doesn't engage after heat up but I'm not really sure it wears out? From my understanding (zero vlsd experience but enough corvette clutch type) the vlsd works similar to something like a AT torque converter (without a TCC luck up clutch). Really no moving/ friction parts to wear and silicon fluid can take a ton of heat cycles. I'll trust others who've experienced it fail but I was just planning to get a z1/ nismo diff cover to help keep it cooler longer (not competitive enough to buy a Gilken).

06-08-2017, 05:47 AM	#10 (permalink)
ScottM Base Member Join Date: Jul 2016 Location: Iroquois Ontario Posts: 244 Drives: 2017 370z Coupe Rep Power: 42163	and potential axle(s) on top of that price if your a base open diff. EDIT: My bad I guess that Z1 sells it complete with them.