Is VLSD in Sport Package really useful ?

felix0121 · 05-31-2017, 04:00 PM

I read an article saying that VLSD has low effect among all LSDs, and is usually used for low-HPs.

I don't know exactly what range of Horse Powers the author meant by 'low-HPs', but I just got curious about my VLSD.

So does the VLSD included in Sport Package really help for better driving, or it is actually not so useful that I cannot expect too much from using it..??

Which is a fact ??

Sent from my SM-G930V using Tapatalk

Z_ealot · 05-31-2017, 04:14 PM

Well, considering your vlsd will just be an open diff after about 60,000 miles or less they arent far off lol

felix0121 · 05-31-2017, 07:13 PM

Quote:

Originally Posted by Z_ealot

Well, considering your vlsd will just be an open diff after about 60,000 miles or less they arent far off lol

Do you mean that VLSD will be not working after driving 60,000 miles around ??

SouthArk370Z · 05-31-2017, 08:47 PM

Quote:

Originally Posted by felix0121

Do you mean that VLSD will be not working after driving 60,000 miles around ??

As the internal fluid breaks down, the limited slip effect becomes less and less. At roughly 60k miles (lots of variables, but that seems to be a good rule-of-thumb figure), you don't have much LS left.

felix0121 · 05-31-2017, 10:58 PM

Quote:

Originally Posted by SouthArk370Z

As the internal fluid breaks down, the limited slip effect becomes less and less. At roughly 60k miles (lots of variables, but that seems to be a good rule-of-thumb figure), you don't have much LS left.

Thanks for the explanation.

Until now I've done my best for all maintenances, and now hitting around 130K miles, I believe I must have gotten the VLSD fluid changed whenever needed.

Then if the fluids were changed properly, is it pretty useful for street driving? (I don't go to a track, and mostly I drive very mildly)

Z_ealot · 05-31-2017, 11:13 PM

Quote:

Originally Posted by felix0121

Thanks for the explanation.

Until now I've done my best for all maintenances, and now hitting around 130K miles, I believe I must have gotten the VLSD fluid changed whenever necessary.

Then if the fluids were changed properly, is it pretty useful for street driving? (I don't go to a track, and mostly I drive very mildly)

the fluid for the actual LSD itself is separate from the differential fluid that you drain from the differential. basically once the fluids in the LSD break down you have to get the LSD rebuilt

osbornsm · 06-01-2017, 08:38 AM

Quote:

Originally Posted by SouthArk370Z

As the internal fluid breaks down, the limited slip effect becomes less and less. At roughly 60k miles (lots of variables, but that seems to be a good rule-of-thumb figure), you don't have much LS left.

So you're sayin my VLSD @ 80,000 miles and 10 track days is prolly not LSD-ing anymore?

littlejuanito · 06-01-2017, 09:23 AM

Quote:

Originally Posted by osbornsm

So you're sayin my VLSD @ 80,000 miles and 10 track days is prolly not LSD-ing anymore?

If what the others are saying is correct, then your LSD is about done.
Vote Cusco!

Rusty · 06-01-2017, 08:29 PM

Quote:

Originally Posted by osbornsm

So you're sayin my VLSD @ 80,000 miles and 10 track days is prolly not LSD-ing anymore?

Mine goes south after about 10 to 15 minutes on the track. After it cools, it will come back.

Z_ealot · 06-01-2017, 11:26 AM

Mine has been done for a while, you can feel the on/off feeling of the vlsd when going through high g force turns

UNKNOWN_370 · 06-01-2017, 12:24 PM

I'm just gonna replace mine unless I go ahead and buy the Nismo? I'm 15,000 miles from that point.

Jsolo · 06-02-2017, 10:49 AM

I wonder if this can be a warrantied item if one has an extended warranty? Without doing a burnout where there's only one tire mark, how else does one check lsd operation?

Rusty · 06-02-2017, 10:58 AM

Quote:

Originally Posted by Jsolo

I wonder if this can be a warrantied item if one has an extended warranty? Without doing a burnout where there's only one tire mark, how else does one check lsd operation?

Good question. Wonder what the dealer does.

YzGyz · 06-02-2017, 04:01 PM

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

Rusty · 06-02-2017, 04:36 PM

The VLSD fluid is silicone based. It it inside the ring gear carrier. Which is a sealed unit. There for separate from the gear lube. Changing the gear lube will have no effect on the silicone fluid in the ring gear carrier. The only way to change the silicone fluid is to get the whole ring gear carrier, because it is a factory sealed unit. So if you are going to do that. You should just go with an aftermarket LSD which is cheaper. Unless you find a factory VLSD on flea-bay. Most of these are toast to begin with. What happens is the silicone fluid breaks down over a period of time. Trackdays SPEED up the process. If you are into

. It will break down quicker then say normal sane DD.

05-31-2017, 04:00 PM	#1 (permalink)
felix0121 Enthusiast Member Join Date: May 2012 Location: California Posts: 477 Drives: 2010 370Z Sport 7AT Rep Power: 67	Is VLSD in Sport Package really useful ? I read an article saying that VLSD has low effect among all LSDs, and is usually used for low-HPs. I don't know exactly what range of Horse Powers the author meant by 'low-HPs', but I just got curious about my VLSD. So does the VLSD included in Sport Package really help for better driving, or it is actually not so useful that I cannot expect too much from using it..?? Which is a fact ?? Sent from my SM-G930V using Tapatalk

06-01-2017, 12:24 PM	#11 (permalink)
UNKNOWN_370 A True Z Fanatic Join Date: Jul 2009 Location: ny'r livn in tx Posts: 8,687 Drives: well over 130m.p.h. Rep Power: 14858	I'm just gonna replace mine unless I go ahead and buy the Nismo? I'm 15,000 miles from that point. __________________ Favorite Quote. "I'm not gonna kill you... I'm just gonna Bash Your Face In" Jack Nicholson-"The Shining". 1980

06-02-2017, 10:49 AM	#12 (permalink)
Jsolo Track Member Join Date: Dec 2011 Location: chicago Posts: 783 Drives: '12 G37 6MT Rep Power: 15	I wonder if this can be a warrantied item if one has an extended warranty? Without doing a burnout where there's only one tire mark, how else does one check lsd operation? __________________ G37S Sedan 6MT, Eibach swaybars, Invidia Exhaust, Weaker Clutch Pedal Spring For sale links

06-02-2017, 04:01 PM	#14 (permalink)
YzGyz A True Z Fanatic Join Date: Jun 2013 Location: Houston Posts: 1,449 Drives: 2010 Nismo Rep Power: 63	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 __________________ http://www.the370z.com/members-370z-...gyzs-turn.html YzGyz

06-02-2017, 04:36 PM	#15 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 69 Posts: 35,379 Drives: 2011 Nismo GM 6M Rep Power: 2684438	The VLSD fluid is silicone based. It it inside the ring gear carrier. Which is a sealed unit. There for separate from the gear lube. Changing the gear lube will have no effect on the silicone fluid in the ring gear carrier. The only way to change the silicone fluid is to get the whole ring gear carrier, because it is a factory sealed unit. So if you are going to do that. You should just go with an aftermarket LSD which is cheaper. Unless you find a factory VLSD on flea-bay. Most of these are toast to begin with. What happens is the silicone fluid breaks down over a period of time. Trackdays SPEED up the process. If you are into . It will break down quicker then say normal sane DD. Z_ealot likes this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

05-31-2017, 04:14 PM	#2 (permalink)
Z_ealot A True Z Fanatic Join Date: Sep 2010 Location: Albuquerque, NM Posts: 2,045 Drives: 09 370Z Touring/Sprt Rep Power: 10091	Well, considering your vlsd will just be an open diff after about 60,000 miles or less they arent far off lol

06-01-2017, 11:26 AM	#10 (permalink)
Z_ealot A True Z Fanatic Join Date: Sep 2010 Location: Albuquerque, NM Posts: 2,045 Drives: 09 370Z Touring/Sprt Rep Power: 10091	Mine has been done for a while, you can feel the on/off feeling of the vlsd when going through high g force turns

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