viscous slip differential
 

is it worth getting sports package on the car due to the viscous slip differential it comes with? is it a big improvement or what u guys think?

The LSD was a factor in my choice. So to me....yes.

the sport package offers big wheels, brakes, sycrorev, and an lsd. Try getting all that for less that what the sport package upgrade costs. Personally, yes I think it's better, I've had cars without it and I hated when only one wheel spun out.

the Viscous LSD, no, everything else, great value. Viscous LSD's are garbage, overheat quickly and lose effectiveness, there have been alot of problems with the stock LSD, check out the track threads.

And Quote:
"Viscous LSDs are less efficient than mechanical types, that is, they "lose" some power. They do not stand up well to abuse. In particular, any sustained load which overheats the silicone results in sudden permanent loss of the differential effect.[5] They do have the virtue of failing gracefully, reverting to semi-open differential behaviour. Typically a visco-differential that has covered 60,000 miles (97,000 km) or more will be functioning largely as an open differential; this is a known weakness of the original Mazda MX-5 (a.k.a. Miata) sports car. The silicone oil is factory sealed in a separate chamber from the gear oil surrounding the rest of the differential. This is not serviceable and when the differential's behaviour deteriorates, the VLSD centre is replaced."

In closing, dont buy it for the LSD, buy it for Synchro Rev Match/Wheels, etc.
Best LSD's in my opinion are the 1.5 way Carbonetics.

For normal street use, the LSD is fine. If you want a track car, then the diff is one of many required upgrades.

I don't think the guy is tracking his car. For the street, the viscous LSD is a fantastic item. The whole sport pkg is a steal, imo.

Where's yours???? :stirthepot:

:shakes head:

House closing today at 10am. Barring any unforeseen issues, I should have $$$$ in my bank account later today or tom'w.

Buying or selling? Good luck!

Sold a house in Brooklyn, got the asking price in cash. Hence the new car.

:driving:

:driving: indeed.


What's the average house go for in Brooklyn? About 800k?

Woof, we derailed this thread. Well in this neighborhood, the average is at least that. It's become like Little Russia...huge influx of Orthodox Hasidim, you know, the guys who wear black hats and have lots of curls...and they have the $$$$$$$$$$$$$. AND, they have to walk to the temples on Saturday, they can't drive, and this house is like 2 blocks away from their temple :icon17:

Back to topic :ugh2:

I guess one way to find out if your VLSD has worn out, would be to dump the clutch and do a burnout (6MT), or stomp the gas (7AT), and observe if you have 1 wheel or 2 wheels leaving rubber...

And if your LSD isn't burned out already mebbe you'll do the deed! Sorry Kann, couldn't resist. :tiphat:

so all in all, the sports package is worth it? also what if i decide the 7at? then the syncro rev match wouldnt matter right? or does it affect 7at still? im just worried if i get 6mt i wont be able to drive it to the ful potential cuz i dont have alot of mt experience ><

The 7AT has synchro rev and works flawlessly. I used to have a 6 man and was worried I would't like it. Boy was I wrong.

The sports mode synchro-rev is for the 6MT only, all the 7AT get rev-match even the base. There is definite value in the sport package for street driving, the LSD does respectably well, the brakes hold up.

i was wondering same about the lsd, but does any one kno if any aftermarket lsd will fit in a 370z without the sport package

yes, thats why its called an "Aftermarket" lsd :tup:

try one of these.

CARBON CLUTCH - CARBONETIC - ACROSS Official Website

oook thanks a lot

Assuming they all have the same bell housing, which I would imagine is the case as I don't think that has changed since the 350.

Here are the Carbonetic part numbers for the carbon clutch diff core.
1.5 way: ACNRB109130
2 Way: ACNRA109130

THMotorsports is running a sale on them starting Friday, although I'm sure they'll take your order now at the same price.

I have noticed my LSD gets warm and looses it "snap" after a few mins of hard driving. It really pisses me off as I am used to mechanical types like on GTR's, S15, etc.

Maybe a simple question...

Without replacing the viscous type with a decent mechanical 1.5way centre, is it possible to change the fluid to make the diff stiffer and more resilient to overheating, slipping?

It's a sealed unit, as far as I know. The diff oil is seperate from the silicone stuff they use in the diff. You could use a cooler to knock out some of the heat build up though.

how would that work for a 7at? u dont have a clutch to push down for it to signal ur about to upshift or downshift.

On the auto there is a slight delay on manually selected gear changes, but it always synchronizes the engine to the next gear.

so syncro rev actually makes a difference? lol

Thats a problem with VLSD's in general, once they heat up, it becomes an open diff. Which is why time attackers and drifters use gear LSD's, I've heard nothing but great things about the carbonetic ones, which is the one I plan on adding once I get my tax return :) You can change the silicone all day long and it wont make a difference, for every day driving, the VLSD is ok, but for sustained abuse, switch it out.

Why would Nissan put a useless viscous LSD in the Z range when nearly all previous models have had mechanical LSD's? S13, RPS13, S14, S15, R32, R33, R34, R35 ...

3 reasons.

Viscous units have better street manors because the slip ratio is high and they are silent.

Viscous units don't wear out with street driving, gear and clutch units eventually require a rebuild.

Viscous units are cheaper, an important point when your building a car for a $30K price point.

All modern automatic transmissions have this. Both the transmission and engine are computer controlled, by synchronizing the 2 the torque converter can be put into lock up mode more quickly making the car feel more responsive/connected.

The concept is simply new to a manual transmission.

Is this true?

Okay, maybe not all, but lets say most. Every new vehicle I've driven in the last 2 years from Ford, Chevy, Nissan and Toyota that has a manumatic mode has had this. Some work better than others but they all seem to have it in one form or another.

What he said. Basically its Nissans way of adding an LSD without driving the cost up and keeping the ride comfortable.

The 350Z had an VLSD.

ok so the sports package is worth it lol, would it be worth changing the flywheel to a lighter one on a automatic? lol

An LSD is all about performance, not quietness and comfort. This is meant to be a sports car not a sofa on wheels.

Viscous units do wear out and become totally useless open diffs. Mechanical units perform at spec for much longer and particularly don't suffer immediate failure at high temps.

Totally disagree about the cost angle. I think it's becuase the Z is NA and not turbo like a Silvia.


That's why it's not on my list of models that had a mechanical LSD.


Apologies for the rant...I just can't understand why Nissan only put real LSD’s in the turbo models and not the NA ones.

Apparently it needs an extra "kit" to add the side shafts, but other than that it will fit.

i have a base without it and i have never had just one wheel spin even with 2 people in the car .I think all have limited slip the sport package is just a little beefier setup.

??????? Dont think so, if all had it they would market it that way as it would sound better.

What I would like to kow is: if I put in a LSD like quaife, will I feel a harshnes in its driving and noise from it? And would it help times for 0 60 and 1/4 mile?

The vlsd is no good for the track (track with turns!)... it craps out and becomes effectively an open diff after a few intense laps... IMO you won't need an LSD for 1/4 mile unless you are driving on a crap track with unequal traction for left/right tires

OP, get the sport package if you want the SRM option

I have the Carbonetic clutch-type LSD installed and it is the exact same part used in the more recent 350z and the G37... my guess is that therefore the 370z sport model rear is similar to 350z's, g37's, and of course non-sport 370z's and therefore a sport VLSD could be swapped into a non-sport.... but I have not verified

I have my VLSD up for sale after ~2K miles and a couple track events... again, not sure if it will fit in the pumpkin of a non-sport Z, but if anyone wants to try it drop me a PM